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train/5000 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is smaller in Pair 2 than in Pair 1. |
train/5001 | Which type of relationship is formed when a Julia butterfly drinks a spectacled caiman's tears? | [
"mutualistic",
"parasitic",
"commensal"
] | 2 | Read the passage. Then answer the question.
Julia butterflies get most of their nutrients by eating nectar from flowers. But a Julia butterfly cannot get enough salt from nectar to survive. The butterfly finds some of the salt it needs in the tears of a reptile called a spectacled caiman.
To get the salt, the butterfl... | closed choice | grade7 | natural science | biology | Ecological interactions | Classify symbiotic relationships | When two organisms of different species interact in a way that affects one or both organisms, they form a symbiotic relationship. The word symbiosis comes from a Greek word that means living together. Scientists define types of symbiotic relationships based on how each organism is affected.
This table lists three commo... | When a Julia butterfly drinks a spectacled caiman's tears, the butterfly gets the salt it needs to survive. So, the butterfly benefits from its relationship with the caiman.
The caiman is not helped or harmed, so the caiman is not significantly affected by its relationship with the butterfly.
Since the butterfly benefi... |
train/5002 | Is sandstone a mineral? | [
"no",
"yes"
] | 0 | Sandstone has the following properties:
not a pure substance
naturally occurring
solid
no fixed crystal structure
not made by organisms | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Sandstone does not have all the properties of a mineral. So, sandstone is not a mineral. |
train/5003 | Select the mammal below. | [
"rabbit",
"box turtle"
] | 0 | Mammals have hair or fur and feed their young milk. A giraffe is an example of a mammal. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A rabbit is a mammal. It has fur and feeds its young milk.
A box turtle is a reptile. It has scaly, waterproof skin. |
train/5004 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 2.",
"The magnetic force is stronger in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other. | Distance affects the strength of the magnetic force. But the distance between the magnets in Pair 1 and in Pair 2 is the same.
So, the strength of the magnetic force is the same in both pairs. |
train/5005 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are... |
train/5006 | Which month is the warmest in Mexico City? | [
"April and May",
"October and November",
"August and September"
] | 0 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Temperature is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average temperature for each month. The average temperature can be used to describe the climate of a location.
A line graph can be used t... | To describe the average temperature trends in Mexico City, look at the graph.
Choice "Apr" is incorrect.
Choice "May" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
The average temperatures in April and May are around 18°C. These months have the... |
train/5007 | Select the organism in the same species as the European wildcat. | [
"Felis silvestris",
"Lynx rufus",
"Lynx canadensis"
] | 0 | This organism is a European wildcat. Its scientific name is Felis silvestris. | closed choice | grade4 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A European wildcat's scientific name is Felis silvestris.
Lynx rufus does not have the same scientific name as a European wildcat. So, Felis silvestris and Lynx rufus are not in the same species.
Felis silvestris has the same scientific name as a European wildcat. So, these organisms are in the same species.
Lynx canad... |
train/5008 | Which of these states is farthest east? | [
"Colorado",
"Arkansas",
"South Carolina",
"Illinois"
] | 2 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. South Carolina is farthest east. | |
train/5009 | What is the capital of Maryland? | [
"Annapolis",
"Montpelier",
"Dover",
"Providence"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | ||
train/5010 | Select the organism in the same genus as the snowy owl. | [
"Bubo scandiacus",
"Haliaeetus pelagicus",
"Tyto alba"
] | 0 | This organism is a snowy owl. Its scientific name is Bubo scandiacus. | closed choice | grade8 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A snowy owl's scientific name is Bubo scandiacus. The first word of its scientific name is Bubo.
Tyto alba is in the genus Tyto. The first word of its scientific name is Tyto. So, Tyto alba and Bubo scandiacus are not in the same genus.
Haliaeetus pelagicus is in the genus Haliaeetus. The first word of its scientific n... |
train/5011 | Which of the following could Josie's test show? | [
"whether the new turbine could produce 10% more electricity",
"how much the new turbine would weigh",
"if the new turbine could turn easily"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade8 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/5012 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The larger the magnets, the greater the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is larger in Pair 1 than in Pair 2. So, the magnitud... |
train/5013 | Which animal's body is better adapted for protection against a predator with sharp teeth? | [
"giant clam",
"hyrax"
] | 0 | Painted turtles are adapted to protect themselves from a predator with sharp teeth. They have hard outer shells covering their bodies. A can pull its head and legs into its shell when attacked.
Figure: painted turtle. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the painted turtle.
The painted turtle has a hard outer shell. Its body is adapted for protection against a predator with sharp teeth. The hard shell makes it difficult for predators to hurt or kill the painted turtle.
Now look at each animal. Figure out which animal has a similar adaptation.
The... |
train/5014 | What is the capital of Minnesota? | [
"Saint Paul",
"Minneapolis",
"Montgomery",
"New York City"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | ||
train/5015 | Which of the following was an independent variable in this experiment? | [
"the amount of time that the tea sat on the desk",
"the number of bacteria in a drop of tea"
] | 0 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Every day at work, Colleen poured a large cup of tea that she drank throughout the morning. She wondered how much bacteria might be growing in her cup of tea as the morning went on.
To find out, Colleen filled... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify independent and dependent variables | Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato... | |
train/5016 | What is the expected ratio of offspring that have agouti fur to offspring that do not have agouti fur? Choose the most likely ratio. | [
"3:1",
"2:2",
"1:3",
"0:4",
"4:0"
] | 4 | This passage describes the agouti fur trait in cats:
Agouti is a fur pattern that is found in many mammals, including cats. When a cat has agouti fur, each of its hairs has bands of different colors. These bands give the cat's coat a striped or swirled pattern. When a cat does not have agouti fur, each of its hairs is ... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring that do or do not have agouti fur, consider whether each phenotype is the dominant or recessive allele's version of the agouti fur trait. The question tells you that the a allele, which is for not having agouti fur, is recessive to the A allele, whic... |
train/5017 | Which of these states is farthest south? | [
"North Dakota",
"Maine",
"Washington",
"New York"
] | 3 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. New York is farthest south. | |
train/5018 | Select the amphibian below. | [
"cane toad",
"tiger shark"
] | 0 | Amphibians have moist skin and begin their lives in water. A red-eyed tree frog is an example of an amphibian. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A tiger shark is a fish. It lives underwater. It has fins, not limbs.
A cane toad is an amphibian. It has moist skin and begins its life in water. |
train/5019 | Is Leopardus wiedii made up of one cell? | [
"no",
"yes"
] | 0 | This organism is Leopardus wiedii. It is a member of the animal kingdom.
Leopardus wiedii is commonly called a margay. Margays live in the forest in Central and South America. Margays are nocturnal. A nocturnal animal sleeps most of the day and is awake at night. | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Leopardus wiedii is an animal. Animals are made up of many cells. |
train/5020 | Which property do these two objects have in common? | [
"hard",
"bendable"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A bendable object can be bent without breaking. Both objects are bendable.
A hard object keeps its shape when you squeeze it. The track suit is not hard.
The property that both objects have in common is bendable. |
train/5021 | What is the name of the colony shown? | [
"West Virginia",
"Kentucky",
"Rhode Island",
"Virginia"
] | 3 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Virginia.
The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony. | ||
train/5022 | Which better describes the Catoctin Mountain Park ecosystem? | [
"It has cold, wet winters. It also has soil that is poor in nutrients.",
"It has cold, wet winters. It also has soil that is rich in nutrients."
] | 1 | Figure: Catoctin Mountain Park.
Catoctin Mountain Park is a temperate deciduous forest ecosystem in Maryland. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, Catoctin Mountain Park has cold, wet winters. It also has soil that is rich in nutrients. |
train/5023 | What is the capital of Nevada? | [
"Las Vegas",
"Carson City",
"Des Moines",
"Reno"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Carson City is the capital of Nevada. | ||
train/5024 | Which animal is also adapted to be camouflaged in a sandy desert? | [
"polar bear",
"camel"
] | 1 | Thorny devils are lizards that live in the deserts of Australia. The is adapted to be camouflaged in a sandy desert.
Figure: thorny devil. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the thorny devil.
The thorny devil has a yellow-and-brown body. It is adapted to be camouflaged in a sandy desert. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The camel has sand-colored fur covering its skin. It is adapted to b... |
train/5025 | What can Belle and Kate trade to each get what they want? | [
"Belle can trade her tomatoes for Kate's sandwich.",
"Kate can trade her almonds for Belle's tomatoes.",
"Belle can trade her tomatoes for Kate's broccoli.",
"Kate can trade her broccoli for Belle's oranges."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Belle and Kate open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Belle wanted bro... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Belle wanted broccoli in her lunch and Kate was hoping for tomatoes. Look at the labeled part of the images.
Belle has tomatoes. Kate has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | |
train/5026 | What is the capital of Montana? | [
"Helena",
"Salem",
"Missoula",
"Austin"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Helena is the capital of Montana. | ||
train/5027 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker in Pair 1.",
"The magnetic force is weaker in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 2 are farther apart than the magnets in Pair 1. So, the magnetic force is weaker in Pair 2 than in Pair 1. |
train/5028 | What is the capital of Nevada? | [
"Madison",
"Montpelier",
"Carson City",
"Cheyenne"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Carson City is the capital of Nevada. | ||
train/5029 | Select the organism in the same species as the western crowned pigeon. | [
"Cyanocitta stelleri",
"Sturnus vulgaris",
"Goura cristata"
] | 2 | This organism is a western crowned pigeon. Its scientific name is Goura cristata. | closed choice | grade8 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A western crowned pigeon's scientific name is Goura cristata.
Sturnus vulgaris does not have the same scientific name as a western crowned pigeon. So, Goura cristata and Sturnus vulgaris are not in the same species.
Goura cristata has the same scientific name as a western crowned pigeon. So, these organisms are in the ... |
train/5030 | Select the organism in the same species as the Canada lynx. | [
"Felis chaus",
"Felis margarita",
"Lynx canadensis"
] | 2 | This organism is a Canada lynx. Its scientific name is Lynx canadensis. | closed choice | grade5 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A Canada lynx's scientific name is Lynx canadensis.
Felis margarita does not have the same scientific name as a Canada lynx. So, Lynx canadensis and Felis margarita are not in the same species.
Lynx canadensis has the same scientific name as a Canada lynx. So, these organisms are in the same species.
Felis chaus does n... |
train/5031 | Why are kangaroos called boxers? | [
"because of how they use their arms to fight",
"because they lick their arms before fighting",
"because they have strong back legs"
] | 0 | Read the text about kangaroos.
Kangaroos are unusual-looking animals. But their funny-looking bodies help them survive in the wild. Thanks to their strong back legs, kangaroos can jump up to thirty feet high. They also pound their long feet and big tails on the ground to warn other kangaroos of danger.
Kangaroos use th... | closed choice | grade3 | language science | reading-comprehension | Informational texts: level 1 | Read passages about animals | Look at the text in bold below. It tells you why kangaroos are called boxers.
Kangaroos use their short arms to defend against each other or dangerous animals, such as wild dogs. Some people call kangaroos boxers because of the way they hold their arms when they fight. Kangaroos sometimes lick their arms on hot days. T... | |
train/5032 | In this experiment, which were part of a control group? | [
"the loaves of bread in bins covered with dark paper",
"the loaves of bread in bins with no covering"
] | 1 | The passage below describes an experiment.
Ava baked bread for a bakery. She stored her bread in clear bins in the back of the bakery, but she sometimes found mold growing on the bread. Ava wondered if less mold would grow if she stored her bread in dark bins.
Ava covered half of the clear bins in dark paper. She left... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify control and experimental groups | Experiments have variables, or parts that change. You can design an experiment to investigate whether changing a variable between different groups has a specific outcome.
For example, imagine you want to find out whether adding fertilizer to soil affects the height of pea plants. You could investigate this question wit... | In this experiment, Ava investigated whether storing bread in dark bins affects mold growth. The loaves of bread in bins with no covering were not stored in dark bins. So, they were part of a control group. |
train/5033 | What can Braden and Evelyn trade to each get what they want? | [
"Evelyn can trade her broccoli for Braden's oranges.",
"Braden can trade his tomatoes for Evelyn's carrots.",
"Evelyn can trade her almonds for Braden's tomatoes.",
"Braden can trade his tomatoes for Evelyn's broccoli."
] | 3 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Braden and Evelyn open their lunch boxes in the school cafeteria. Neither Braden nor Evelyn got everything that they wanted. The ... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Braden wants broccoli. Evelyn wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | |
train/5034 | Which of these colonies was Southern Colonies? | [
"Pennsylvania",
"Maryland"
] | 1 | In the following questions, you will learn about the origin of the Southern Colonies. The Southern Colonies made up the southern part of the Thirteen Colonies, which were ruled by Great Britain in the 1600s and 1700s. The population of the Southern Colonies included enslaved and free people of African descent, Native A... | closed choice | grade7 | social science | us-history | Colonial America | Southern Colonies: founding and government | Look at the legend on the map.
All of the colonies are shaded by region. The Southern Colonies included five colonies:
The rest of the Thirteen Colonies were part of the Middle Colonies or New England. | |
train/5035 | In this food chain, the seagrass is a producer. Why? | [
"It eats a consumer.",
"It makes its own food.",
"It eats another organism."
] | 1 | This diagram shows a food chain from Chesapeake Bay, an estuary ecosystem in Maryland and Virginia. | closed choice | grade5 | natural science | biology | Ecosystems | Identify roles in food chains | Every organism needs food to stay alive. Organisms get their food in different ways. A food chain shows how organisms in an ecosystem get their food.
The food chain begins with the producer. A producer can change matter that is not food into food. Many producers use carbon dioxide, water, and sunlight to make sugar. Ca... | In this food chain, the seagrass is a producer because it makes its own food. The seagrass uses carbon dioxide, water, and sunlight to make its own food. |
train/5036 | Why might removing broken eggshells from the nest increase the reproductive success of a black-headed gull? Complete the claim below that answers this question and is best supported by the passage.
Removing broken eggshells from the nest increases the chances that (). | [
"the gull's chicks will get food",
"the gull's offspring will survive",
"the gull will be away from its offspring at a given time"
] | 1 | Animals often behave in certain ways that can increase their reproductive success. Read the passage about a specific animal behavior. Then, follow the instructions below.
Black-headed gulls build their nests on the ground. The gulls' eggs, chicks, and nests are brown, so they blend in with the sand, twigs, and dry gra... | closed choice | grade8 | natural science | literacy-in-science | Adaptations and natural selection | How can animal behaviors affect reproductive success? Identify evidence to support a claim | Animals increase their reproductive success when they have offspring that survive to reproduce.
Animals can increase their chances of having offspring by behaving in ways that help them get partners to mate and reproduce with. These partners are called mates. For example, animals may make special sounds, perform specif... | Look for the part of the passage that describes the effect of removing broken eggshells from the nest. Use this information to determine why this behavior can increase the reproductive success of the black-headed gull.
Choice "Black-headed gulls build their nests on the ground. The gulls' eggs, chicks, and nests are br... |
train/5037 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/5038 | Which animal's skin is better adapted as a warning sign to ward off predators? | [
"hawk moth",
"lionfish"
] | 1 | Strawberry poison frogs have poisonous glands in their brightly colored skin. The bright colors serve as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: strawberry poison frog. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the strawberry poison frog.
The strawberry poison frog has poisonous glands in its brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the strawberry poison frog is poisonous.
Now look at each animal. Figure out which animal has a simil... |
train/5039 | Which property do these three objects have in common? | [
"sweet",
"rough",
"translucent"
] | 1 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
Sugar has a sweet taste. The rock are not sweet.
A translucent object lets light through. But you cannot see clearly through a translucent object. The tree bark is not translucent.
A rough object feels scratchy when you touch it. All three objects ar... |
train/5040 | Which of these states is farthest east? | [
"Arkansas",
"Indiana",
"Kansas",
"Montana"
] | 1 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Indiana is farthest east. | |
train/5041 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 2.",
"The magnetic force is stronger in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other. | Distance affects the strength of the magnetic force. But the distance between the magnets in Pair 1 and in Pair 2 is the same.
So, the strength of the magnetic force is the same in both pairs. |
train/5042 | Which country is highlighted? | [
"Grenada",
"Haiti",
"Jamaica",
"Cuba"
] | 3 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Cuba.
Does Cuba have any territorial disputes?
Cuba claims to own Guantanamo Bay Naval Base, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
The United States controls the area and uses it as a military base and prison. A treaty... | ||
train/5043 | What is the capital of New York? | [
"New York City",
"Provo",
"Albany",
"Indianapolis"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Albany is the capital of New York. | ||
train/5044 | In this food web, which organism contains matter that eventually moves to the bolete fungus? | [
"black racer",
"black bear"
] | 0 | Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade8 | natural science | biology | Ecological interactions | Interpret food webs II | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows to the bolete fungus.There is one path matter can take from the black racer to the bolete fungus: black racer->bolete fungus. There are three paths matter can take from the pine vole to the bolete fungu... |
train/5045 | What is the name of the colony shown? | [
"New Hampshire",
"Washington, D.C.",
"North Carolina",
"Maryland"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/5046 | Which state is highlighted? | [
"Alaska",
"California",
"Nevada",
"Colorado"
] | 0 | closed choice | grade5 | social science | geography | States | Identify the 50 states | This state is Alaska. | ||
train/5047 | Which two months have the lowest average precipitation in Salt Lake City? | [
"November and December",
"September and October",
"July and August"
] | 2 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average precipitation for each month. The average precipitation can be used to describe the climate of a location.
A... | To describe the average precipitation trends in Salt Lake City, look at the graph.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
Choice "Dec" is incorrect.
July and August each have an average precipitation of less than 1 inch. All... |
train/5048 | What is the capital of Montana? | [
"Dover",
"Missoula",
"Billings",
"Helena"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Helena is the capital of Montana. | ||
train/5049 | What can Marcy and Jayla trade to each get what they want? | [
"Jayla can trade her broccoli for Marcy's oranges.",
"Jayla can trade her almonds for Marcy's tomatoes.",
"Marcy can trade her tomatoes for Jayla's broccoli.",
"Marcy can trade her tomatoes for Jayla's carrots."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Marcy and Jayla open their lunch boxes in the school cafeteria. Neither Marcy nor Jayla got everything that they wanted. The tabl... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Marcy wants broccoli. Jayla wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | |
train/5050 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater.
There is a smaller distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2. |
train/5051 | Based on the wind speeds measured this day, which area was more likely to be an air mass source region? | [
"Area B",
"Area A"
] | 1 | Air masses influence weather everywhere on Earth. But air masses can form only over certain places. These places are known as air mass source regions.
Source regions are places that have low wind speeds for days or weeks at a time. When wind speeds are low, air above the source region remains in place. When air remains... | closed choice | grade6 | natural science | earth-science | Weather and climate | How do air masses form? | Source regions are places that have low wind speeds. Use the map to decide which outlined area has lower wind speeds.
On the map, low wind speeds are shown in white, and high wind speeds are shown in blue. Area A is mostly white, which means that wind speeds there were low. Area B is mostly blue, which means that wind ... | |
train/5052 | Which term matches the picture? | [
"obsidian",
"granite"
] | 1 | Read the text.
Igneous rock forms when melted rock, like magma or lava, cools and hardens. The faster the rock cools, the finer its grain. That's because there isn't as much time for crystals to form. A rock like obsidian cools quickly and creates a smooth and glassy black rock. Obsidian can be chipped down into a fine... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | Granite is a type of rock that has visible patterns. It can come in lots of different colors and looks speckled, or spotted. | |
train/5053 | Which statement describes the Sahara Desert ecosystem? | [
"It has thick, moist soil",
"It has dry, thin soil.",
"It has only a few types of organisms."
] | 1 | Figure: Sahara Desert.
The Sahara Desert in northern Africa is the largest hot desert in the world. Less than one-fifth of this desert is covered in sand dunes. Most of the Sahara Desert is covered by bare rock, gravel, and pebbles! | closed choice | grade5 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A hot desert is a type of ecosystem. Hot deserts have the following features: a small amount of rain, dry, thin soil, many different types of organisms, and It has thick, moist soil. So, the following statement describes the Sahara Desert ecosystem: a small amount of rain, dry, thin soil, many different types of organi... |
train/5054 | Select the organism in the same genus as the tawny owl. | [
"Larus livens",
"Cyanocitta stelleri",
"Strix nebulosa"
] | 2 | This organism is a tawny owl. Its scientific name is Strix aluco. | closed choice | grade8 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A tawny owl's scientific name is Strix aluco. The first word of its scientific name is Strix.
Larus livens is in the genus Larus. The first word of its scientific name is Larus. So, Larus livens and Strix aluco are not in the same genus.
Strix nebulosa is in the genus Strix. The first word of its scientific name is Str... |
train/5055 | Which of these states is farthest west? | [
"Arkansas",
"New York",
"Kentucky",
"Georgia"
] | 0 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Arkansas is farthest west. | |
train/5056 | What can Gabrielle and Patty trade to each get what they want? | [
"Gabrielle can trade her tomatoes for Patty's carrots.",
"Patty can trade her almonds for Gabrielle's tomatoes.",
"Gabrielle can trade her tomatoes for Patty's broccoli.",
"Patty can trade her broccoli for Gabrielle's oranges."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Gabrielle and Patty open their lunch boxes in the school cafeteria. Neither Gabrielle nor Patty got everything that they wanted. ... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Gabrielle wants broccoli. Patty wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | |
train/5057 | Select the bird below. | [
"poison dart frog",
"woodpecker"
] | 1 | Birds have feathers, two wings, and a beak. A painted stork is an example of a bird. | closed choice | grade3 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A woodpecker is a bird. It has feathers, two wings, and a beak.
Woodpeckers have strong beaks. They use their beaks to drill into wood to hunt for food.
A poison dart frog is an amphibian. It has moist skin and begins its life in water.
Poison dart frogs come in many bright colors. Their bright color warns other animal... |
train/5058 | What is the capital of Utah? | [
"Madison",
"Sacramento",
"New York City",
"Salt Lake City"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | ||
train/5059 | Which of the following was an independent variable in this experiment? | [
"the temperature of the soda",
"the size of the ice pieces"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Lucy's brother thought that crushed ice would keep his soda cooler than whole ice cubes.
To test this idea, Lucy divided a large bottle of soda equally among six glasses. Lucy added five whole ice cubes to eac... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify independent and dependent variables | Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato... | |
train/5060 | Which of the following could Isabelle and Maddie's test show? | [
"if a new batch of concrete was firm enough to use",
"if the concrete from each batch took the same amount of time to dry"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade6 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/5061 | Which animal's feet are also adapted for digging? | [
"tokay gecko",
"meerkat"
] | 1 | s are found in many parts of Europe. They dig and live in burrows. These moles eat earthworms and nuts, which they find in the soil. The feet of the are adapted for digging.
Figure: European mole. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with thick fur m... | Look at the picture of the European mole.
The European mole has long, straight claws. Its feet are adapted for digging. The European mole uses its claws to break up soil and move it out of the way.
Now look at each animal. Figure out which animal has a similar adaptation.
The meerkat has long, straight claws. Its feet ... |
train/5062 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/5063 | Which animal's limbs are also adapted for climbing trees? | [
"red-necked wallaby",
"lar gibbon"
] | 1 | s live in the rain forests of Indonesia and Malaysia. Their limbs are adapted for climbing trees.
Figure: Sumatran orangutan. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the Sumatran orangutan.
The Sumatran orangutan uses its long limbs to reach branches while climbing. It uses its fingers and toes to grab the branches.
Now look at each animal. Figure out which animal has a similar adaptation.
The lar gibbon has long limbs with fingers and toes. Its limbs are ada... |
train/5064 | What is the name of the colony shown? | [
"Pennsylvania",
"Delaware",
"New Hampshire",
"Wisconsin"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/5065 | Is Drosophila melanogaster made up of many cells? | [
"yes",
"no"
] | 0 | This organism is Drosophila melanogaster. It is a member of the animal kingdom.
Drosophila melanogaster is commonly called a fruit fly. Many scientists study fruit flies to learn about how animals grow and live. | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | Drosophila melanogaster is an animal. Animals are made up of many cells. | |
train/5066 | Which i in column 2? | [
"the theater",
"the gas station",
"the park",
"the fire department"
] | 3 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The fire department is in column 2. | |
train/5067 | Select the organism in the same species as the European hedgehog. | [
"Erinaceus europaeus",
"Lepus americanus",
"Sciurus vulgaris"
] | 0 | This organism is a European hedgehog. Its scientific name is Erinaceus europaeus. | closed choice | grade6 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A European hedgehog's scientific name is Erinaceus europaeus.
Erinaceus europaeus has the same scientific name as a European hedgehog. So, these organisms are in the same species.
Sciurus vulgaris does not have the same scientific name as a European hedgehog. So, Erinaceus europaeus and Sciurus vulgaris are not in the ... |
train/5068 | Which of the following could Eli's test show? | [
"if the weather station would work when the temperature was 50°C",
"how well the weather station would work when it was windy"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade6 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/5069 | Which of the following statements is true about gas particles? | [
"Gas particles are tightly packed together.",
"Gas particles rarely collide with each other.",
"Gas particles are always moving."
] | 2 | All substances are made up of small particles of matter that are constantly moving. In a gas, these particles can move freely and tend to be far from one another. In fact, the space a gas takes up is mostly empty!
Gas particles move quickly and randomly. They travel in straight lines, changing direction whenever they c... | closed choice | grade6 | natural science | physics | Particle motion and energy | How does particle motion affect gas pressure? | ||
train/5070 | Which property do these four objects have in common? | [
"transparent",
"hard",
"sweet"
] | 2 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
You can see clearly through a transparent object. The candy sprinkles, the ice pop, and the ice cream sundae are not transparent.
A hard object does not change shape when pressed or squeezed. The ice pop is hard, but the ice cream sundae and the jell... |
train/5071 | Which animal is also adapted to be camouflaged among dead leaves? | [
"fire salamander",
"orange oakleaf butterfly"
] | 1 | Fantastic leaf-tailed geckos live in tropical forests around the world. The is adapted to be camouflaged among dead leaves.
Figure: fantastic leaf-tailed gecko. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the fantastic leaf-tailed gecko.
The fantastic leaf-tailed gecko has reddish-brown skin and a leaf-shaped tail. It is adapted to be camouflaged among dead leaves, which often have a reddish or brownish color. The word camouflage means to blend in.
Now look at each animal. Figure out which animal ... |
train/5072 | Which country is highlighted? | [
"the Marshall Islands",
"Vanuatu",
"Tonga",
"Solomon Islands"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Solomon Islands. | ||
train/5073 | Which of these continents does the equator intersect? | [
"Antarctica",
"Europe",
"South America"
] | 2 | closed choice | grade5 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The equator is the line at 0° latitude. It intersects South America. It does not intersect Antarctica or Europe. | |
train/5074 | Which statement best describes the average monthly precipitation in Atlanta? | [
"Precipitation does not change much from month to month in Atlanta.",
"Atlanta has a rainy season and a dry season.",
"October has the highest average precipitation."
] | 0 | Use the graph to answer the question below. | closed choice | grade3 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data.
A bar graph can be used to show the average amount of precipitation each month. Months with taller bars have more precipitation on average. | To describe the average precipitation trends in Atlanta, look at the graph.
Choice "Oct" is incorrect.
Choice "October has the highest average precipitation." is incorrect.
Most other months have a slightly higher average precipitation than October.
Choice "Precipitation does not change much from month to month in Atla... |
train/5075 | Which solution has a higher concentration of purple particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 2 | The diagram below is a model of two solutions. Each purple ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... |
train/5076 | Which of these states is farthest east? | [
"New Hampshire",
"Louisiana",
"New Jersey",
"North Carolina"
] | 0 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. New Hampshire is farthest east. | |
train/5077 | Which continent is highlighted? | [
"South America",
"Australia",
"Europe",
"Asia"
] | 2 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Europe. | |
train/5078 | Which better describes the Oglala National Grassland ecosystem? | [
"It has hot summers and cool winters. It also has soil that is rich in nutrients.",
"It has a small amount of rain. It also has dry, thin soil."
] | 0 | Figure: Oglala National Grassland.
Oglala National Grassland is a prairie grassland ecosystem in northwestern Nebraska. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A prairie grassland is a type of ecosystem. Prairie grasslands have the following features: hot summers and cool winters, a medium amount of rain, and soil that is rich in nutrients. So, Oglala National Grassland has hot summers and cool winters. It also has soil that is rich in nutrients. |
train/5079 | Which solution has a higher concentration of pink particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container.
Use the concentration formula to find the number of pink particles per milliliter.
... |
train/5080 | What can Sharon and Devin trade to each get what they want? | [
"Sharon can trade her tomatoes for Devin's sandwich.",
"Sharon can trade her tomatoes for Devin's broccoli.",
"Devin can trade his almonds for Sharon's tomatoes.",
"Devin can trade his broccoli for Sharon's oranges."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Sharon and Devin open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Sharon wanted ... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Sharon wanted broccoli in her lunch and Devin was hoping for tomatoes. Look at the labeled part of the images.
Sharon has tomatoes. Devin has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | |
train/5081 | Which property do these four objects have in common? | [
"soft",
"salty",
"rough"
] | 2 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A soft object changes shape when pressed or squeezed. The sidewalk is not soft.
Potato chips have a salty taste. The pineapple is not salty.
A rough object feels scratchy when you touch it. All four objects are rough.
The property that all four objec... |
train/5082 | Which better describes the Steigerwald Forest ecosystem? | [
"It has cold, wet winters. It also has soil that is poor in nutrients.",
"It has soil that is rich in nutrients. It also has only a few types of trees."
] | 1 | Figure: Steigerwald Forest.
The Steigerwald Forest is a temperate deciduous forest ecosystem in Bavaria, a state in southern Germany. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, the Steigerwald Forest has soil that is rich in nutrients. It also has only a few types of trees. |
train/5083 | Select the amphibian below. | [
"emu",
"piranha",
"great crested newt",
"Madagascar day gecko"
] | 2 | Amphibians have moist skin and begin their lives in water.
Amphibians are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
An arroyo toad is an example of an amphibian. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | An emu is a bird. It has feathers, two wings, and a beak.
Emus cannot fly, but they can run very fast. They run to avoid predators.
A Madagascar day gecko is a reptile. It has scaly, waterproof skin.
Many geckos have special pads on their toes. The pads help them climb up plants and rocks.
A piranha is a fish. It lives... |
train/5084 | Which property do these four objects have in common? | [
"sweet",
"sour",
"soft"
] | 1 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A soft object changes shape when pressed or squeezed. The lime, the dill pickles, and the lemon are soft, but the green apple is not.
A lemon has a sour taste. All four objects are sour.
Sugar has a sweet taste. The dill pickles are not sweet.
The pr... |
train/5085 | What is the expected ratio of offspring with a woolly fleece to offspring with a hairy fleece? Choose the most likely ratio. | [
"1:3",
"3:1",
"0:4",
"4:0",
"2:2"
] | 0 | This passage describes the fleece type trait in sheep:
The fleece, or outer coat, of a sheep is often cut off and used to make yarn for fabrics and other textiles. Woolly fleeces, which have shorter hairs, are usually used for clothing and blankets. Hairy fleeces, which have longer hairs, are usually used for carpets.
... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring with a woolly fleece or a hairy fleece, consider whether each phenotype is the dominant or recessive allele's version of the fleece type trait. The question tells you that the F allele, which is for a hairy fleece, is dominant over the f allele, whic... |
train/5086 | What can Marshall and Emilio trade to each get what they want? | [
"Emilio can trade his almonds for Marshall's tomatoes.",
"Marshall can trade his tomatoes for Emilio's carrots.",
"Marshall can trade his tomatoes for Emilio's broccoli.",
"Emilio can trade his broccoli for Marshall's oranges."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Marshall and Emilio open their lunch boxes in the school cafeteria. Neither Marshall nor Emilio got everything that they wanted. ... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Marshall wants broccoli. Emilio wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | |
train/5087 | What is the capital of Arkansas? | [
"Raleigh",
"Pierre",
"Little Rock",
"Fayetteville"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Little Rock is the capital of Arkansas. | ||
train/5088 | What is the name of the colony shown? | [
"Virginia",
"Maryland",
"Washington, D.C.",
"Maine"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/5089 | Select the organism in the same genus as the purple heron. | [
"Sarracenia purpurea",
"Crocodylus moreletii",
"Ardea cinerea"
] | 2 | This organism is a purple heron. Its scientific name is Ardea purpurea. | closed choice | grade6 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A purple heron's scientific name is Ardea purpurea. The first word of its scientific name is Ardea.
Crocodylus moreletii is in the genus Crocodylus. The first word of its scientific name is Crocodylus. So, Crocodylus moreletii and Ardea purpurea are not in the same genus.
Ardea cinerea is in the genus Ardea. The first ... |
train/5090 | Which better describes the Tibetan Plateau ecosystem? | [
"It has short, cold summers. It also has mostly small plants.",
"It has long, cold winters. It also has many evergreen trees."
] | 0 | Figure: Tibetan Plateau.
The Tibetan Plateau is a tundra ecosystem located in Tibet, western China, and northern India. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A tundra is a type of ecosystem. Tundras have the following features: long, cold winters and short, cold summers, soil that is frozen year-round, and mostly small plants. So, the Tibetan Plateau has short, cold summers. It also has mostly small plants. |
train/5091 | Which continent is highlighted? | [
"Asia",
"Europe",
"North America",
"Australia"
] | 2 | closed choice | grade7 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is North America. | |
train/5092 | What is the capital of Alaska? | [
"Little Rock",
"Anchorage",
"Fairbanks",
"Juneau"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/5093 | What is the capital of Arizona? | [
"Salt Lake City",
"Helena",
"Tucson",
"Phoenix"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Phoenix is the capital of Arizona. | ||
train/5094 | What can Samuel and Edwin trade to each get what they want? | [
"Samuel can trade his tomatoes for Edwin's broccoli.",
"Samuel can trade his tomatoes for Edwin's carrots.",
"Edwin can trade his broccoli for Samuel's oranges.",
"Edwin can trade his almonds for Samuel's tomatoes."
] | 0 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Samuel and Edwin open their lunch boxes in the school cafeteria. Neither Samuel nor Edwin got everything that they wanted. The ta... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Samuel wants broccoli. Edwin wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | |
train/5095 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/5096 | Which of the following organisms is the producer in this food web? | [
"golden algae",
"bacteria",
"black crappie"
] | 0 | Below is a food web from Little Rock Lake, a freshwater lake ecosystem in Wisconsin.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade5 | natural science | biology | Ecosystems | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Producers do not eat other organisms. So, in a food web, producers do not have arrows pointing to them from other organisms.
The bacteria have arrows pointing to them, so they are not producers.
The black crappie has arrows pointing to it, so it is not a producer.
The golden algae does not have any arrows pointing to i... |
train/5097 | Which country is highlighted? | [
"Saint Lucia",
"Haiti",
"Saint Vincent and the Grenadines",
"Barbados"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Haiti.
Does Haiti have any territorial disputes?
Haiti claims to own Navassa Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
Navassa Island is also claimed by the United States. The United States claimed the island in 18... | ||
train/5098 | Which property do these four objects have in common? | [
"salty",
"smooth",
"fuzzy"
] | 0 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
Potato chips have a salty taste. All four objects are salty.
A fuzzy object is covered in soft hair. The cracker is not fuzzy.
A smooth object is not scratchy or rough. The fries, the potato chips, and the cracker are not smooth.
The property that al... |
train/5099 | Which better describes the tide pool ecosystems in Montaña De Oro State Park? | [
"It has daily flooding and draining of seawater. It also has many different types of organisms.",
"It has no sunlight. It also has daily flooding and draining of seawater."
] | 0 | Figure: Montaña De Oro State Park.
Montaña De Oro State Park is in California. The park is on the coast of the Pacific Ocean. It has many tide pool ecosystems. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A tide pool is a type of ecosystem. Tide pool ecosystems have the following features: daily flooding and draining of seawater, water that is rich in nutrients, and many different types of organisms. So, the tide pool ecosystems in Montaña De Oro State Park have daily flooding and draining of seawater. They also have ma... |
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