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train/4300 | What is the capital of Colorado? | [
"Concord",
"Boulder",
"Colorado Springs",
"Denver"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/4301 | Select the bird below. | [
"sea otter",
"turkey vulture"
] | 1 | Birds have feathers, two wings, and a beak. An ostrich 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 turkey vulture is a bird. It has feathers, two wings, and a beak.
Vultures do not usually hunt live animals. They eat animals that are already dead! This behavior is called scavenging.
A sea otter is a mammal. It has fur and feeds its young milk.
Sea otters have very thick fur. Their fur keeps them warm in cold water... |
train/4302 | Identify the question that Kathleen's experiment can best answer. | [
"Do slugs eat more from tomato leaves or broccoli leaves?",
"Do slugs weigh more after eating tomato leaves or broccoli leaves?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Kathleen cut tomato and broccoli plant leaves into one-inch squares. In each of 12 containers, she placed six leaf squares: three tomato-leaf squares and three broccoli-leaf squares. She put one slug from her garden int... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4303 | What is the name of the colony shown? | [
"Iowa",
"Massachusetts",
"Rhode Island",
"Michigan"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Massachusetts.
The Massachusetts Colony included land that would later become the state of Maine. Maine was never its own colony. | ||
train/4304 | What is the probability that a cucumber plant produced by this cross will be heterozygous for the fruit sheen gene? | [
"4/4",
"1/4",
"3/4",
"0/4",
"2/4"
] | 3 | In a group of cucumber plants, some individuals have dull fruit and others have glossy fruit. In this group, the gene for the fruit sheen trait has two alleles. The allele for dull fruit (F) is dominant over the allele for glossy fruit (f).
This Punnett square shows a cross between two cucumber plants. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | |
train/4305 | What is the capital of Iowa? | [
"Des Moines",
"Jefferson City",
"Minneapolis",
"Davenport"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Des Moines is the capital of Iowa. | ||
train/4306 | Which statement describes the Sahara Desert ecosystem? | [
"It has a small amount of rain.",
"It has only a few types of organisms."
] | 0 | 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 | grade6 | 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, and many different types of organisms. So, the following statements describe the Sahara Desert ecosystem: a small amount of rain, dry, thin soil, and many different types of organisms. It has a small am... |
train/4307 | Which country is highlighted? | [
"Tuvalu",
"Nauru",
"Kiribati",
"the Marshall Islands"
] | 2 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | ||
train/4308 | Which property matches this object? | [
"smooth",
"stretchy"
] | 0 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. | Look at the object.
Think about each property.
A stretchy object gets longer when you pull on it. The bowling ball is not stretchy.
A smooth object is not scratchy or rough. The bowling ball is smooth. |
train/4309 | Which of these states is farthest north? | [
"Oklahoma",
"Illinois",
"South Carolina",
"Arizona"
] | 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 north arrow is pointing. Illinois is farthest north. | |
train/4310 | Which of the following was an independent variable in this experiment? | [
"the number of ripe bananas",
"the number of ripe avocados"
] | 0 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Katy liked to make guacamole, but she could often find only unripe at the grocery store. In biology class, Katy learned that ripe fruits produce a gas called ethylene that can cause other fruits to ripen. Kat... | 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/4311 | 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 2.",
"The magnetic force is weaker 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. | 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/4312 | What is the capital of Montana? | [
"Helena",
"Missoula",
"Philadelphia",
"Billings"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Helena is the capital of Montana. | ||
train/4313 | Select the organism in the same genus as the plains zebra. | [
"Camelus bactrianus",
"Equus grevyi",
"Cervus canadensis"
] | 1 | This organism is a plains zebra. Its scientific name is Equus quagga. | 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 plains zebra's scientific name is Equus quagga. The first word of its scientific name is Equus.
Camelus bactrianus is in the genus Camelus. The first word of its scientific name is Camelus. So, Camelus bactrianus and Equus quagga are not in the same genus.
Equus grevyi is in the genus Equus. The first word of its sci... |
train/4314 | Which solution has a higher concentration of green particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each green 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 green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/4315 | What is the capital of New York? | [
"Trenton",
"Albany",
"Harrisburg",
"Sacramento"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Albany is the capital of New York. | ||
train/4316 | Which of the following best describes a population on an island in the Bahamas? | [
"the rocky soil and the small trees",
"the brown anole lizards",
"the Bahamian boa constrictors and the curly-tailed lizards"
] | 1 | Read the passage. Then answer the question below.
The Bahamas is an archipelago made up of over 700 islands. The islands are mostly flat, with sandy beaches, rocky soil, and small trees.
Most of the Bahamas islands are home to brown anole lizards. This species of lizard eats small insects such as crickets, ants, and g... | closed choice | grade7 | natural science | biology | Ecosystems | Describe populations, communities, and ecosystems | In an environment, organisms interact with each other and with their nonliving surroundings. To help describe these interactions, ecologists use specific terms for different types of groups.
A single organism is an individual. Individuals of the same species that live in the same place are part of a population.
Multipl... | |
train/4317 | Select the bird below. | [
"helmeted iguana",
"flamingo"
] | 1 | Birds have feathers, two wings, and a beak. A keel-billed toucan is an example of a bird. | 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 flamingo is a bird. It has feathers, two wings, and a beak.
A helmeted iguana is a reptile. It has scaly, waterproof skin. |
train/4318 | Which bird's beak is also adapted to catch insects? | [
"European nightjar",
"Australian pelican"
] | 0 | s eat insects and other small invertebrates. The shape of the 's beak is adapted to catch insects.
Figure: European robin. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the European robin.
A short, thin beak is light and easy to move. The European robin uses its beak to grab fast-moving insects while flying.
Now look at each bird. Figure out which bird has a similar adaptation.
The European nightjar has a short, thin beak. Its beak is adapted to catch insects.
T... |
train/4319 | Which property do these two objects have in common? | [
"slippery",
"bouncy"
] | 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 slippery object is hard to hold onto or stand on. The tennis ball is not slippery.
A bouncy object will bounce back from the floor if you drop it. Both objects are bouncy.
The property that both objects have in common is bouncy. |
train/4320 | What is the capital of Rhode Island? | [
"Trenton",
"Montpelier",
"Providence",
"Newport"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Providence is the capital of Rhode Island. | ||
train/4321 | Which continent is highlighted? | [
"South America",
"Antarctica",
"Europe",
"Africa"
] | 1 | closed choice | grade8 | 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 Antarctica. | |
train/4322 | What is the name of the colony shown? | [
"Rhode Island",
"Massachusetts",
"Connecticut",
"South Carolina"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Massachusetts.
The Massachusetts Colony included land that would later become the state of Maine. Maine was never its own colony. | ||
train/4323 | Which better describes the Steigerwald Forest ecosystem? | [
"It has warm, dry summers. It also has many different types of trees.",
"It has warm, wet summers. 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 | 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, the Steigerwald Forest has warm, wet summers. It also has only a few types of trees. |
train/4324 | Which property do these two objects have in common? | [
"slippery",
"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 slippery object is hard to hold onto or stand on. Neither of the objects are slippery.
A bendable object can be bent without breaking. Both objects are bendable.
The property that both objects have in common is bendable. |
train/4325 | Is the following statement about our solar system true or false?
The smallest planet is made mainly of rock. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade7 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that the smallest planet is Mercury and that Mercury is made mainly of rock. So, the smallest planet is made mainly of rock. |
train/4326 | Which of these continents does the prime meridian intersect? | [
"Australia",
"Europe",
"South America"
] | 1 | closed choice | grade4 | 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 prime meridian is the line at 0° longitude. It intersects Europe. It does not intersect South America or Australia. | |
train/4327 | Which state is highlighted? | [
"Alaska",
"Nevada",
"Colorado",
"Washington"
] | 2 | closed choice | grade5 | social science | geography | States | Identify the 50 states | This state is Colorado. | ||
train/4328 | Which animal's skin is better adapted to hurt an attacking predator? | [
"thorny devil",
"lesser bushbaby"
] | 0 | Hedgehogs have sharp spines covering much of their skin. These spines are called quills. The skin of the is adapted to hurt an attacking predator.
Figure: hedgehog. | 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 hedgehog.
The hedgehog has sharp spines on its skin. Its skin is adapted to hurt an attacking predator. The spines can harm a predator that tries to bite the hedgehog.
Now look at each animal. Figure out which animal has a similar adaptation.
The thorny devil has sharp spines on its skin. Its... |
train/4329 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 2.",
"The magnetic force is stronger in Pair 1.",
"The strength of the magnetic force is the same in both pairs."
] | 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. | 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 closer together, the magnetic force between them is stronger.
The magnets in Pair 1 are closer together than the magnets in Pair 2. So, the magnetic force is stronger in Pair 1 than in Pair 2. |
train/4330 | Identify the question that Ellen and Lamar's experiment can best answer. | [
"Does Ellen's snowboard slide down a hill in less time when it has a layer of wax or when it does not have a layer of wax?",
"Does Ellen's snowboard slide down a hill in less time when it has a thin layer of wax or a thick layer of wax?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Ellen applied a thin layer of wax to the underside of her snowboard and rode the board straight down a hill. Then, she removed the wax and rode the snowboard straight down the hill again. She repeated the rides four mor... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4331 | Is Pleopeltis polypodioides made up of many cells? | [
"yes",
"no"
] | 0 | This organism is Pleopeltis polypodioides. It is a member of the plant kingdom.
Pleopeltis polypodioides can survive without water for a long time. Because of this, it can grow in very dry places. In the image, you can see P. polypodioides growing on a cooled black lava flow. | 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... | Pleopeltis polypodioides is a plant. Plants are made up of many cells. |
train/4332 | Is Hevea brasiliensis made up of one cell? | [
"yes",
"no"
] | 1 | This organism is Hevea brasiliensis. It is a member of the plant kingdom.
Hevea brasiliensis is commonly called a rubber tree. Rubber trees make a white liquid called latex. Rubber trees use latex for protection. Latex has a bad taste and can be poisonous to some animals. So, the latex helps to stop animals from eating... | 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... | Hevea brasiliensis is a plant. Plants are made up of many cells. |
train/4333 | Which specific humidity level was measured within the outlined area shown? | [
"13 grams of water vapor per kilogram of air",
"9 grams of water vapor per kilogram of air",
"19 grams of water vapor per kilogram of air"
] | 2 | The map below shows humidity in the lower atmosphere on October 28, 2013. The map shows specific humidity, a measurement of the amount of water vapor in the air. The outlined area shows an air mass that influenced weather in Asia on that day.
Look at the map. Then, answer the question below.
Data source: United States ... | closed choice | grade7 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show specific humidity, a measurement of the amount of water vapor in the air.
The map's legend tells you the specific humidity level that each color represents. Colors on the left in th... | Look at the colors shown within the outlined area. Then, use the legend to determine which specific humidity levels those colors represent.
The legend tells you that this air mass contained air with specific humidity levels between 18 and 24 grams of water vapor per kilogram of air.
19 grams of water vapor per kilogram... |
train/4334 | In this food chain, the midge larva is a primary consumer. Why? | [
"It eats a secondary consumer.",
"It eats a producer.",
"It eats a primary consumer."
] | 1 | This diagram shows a food chain from the River Frome, a freshwater ecosystem in England. | 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 midge larva is a primary consumer because it eats a producer. The producer in this food chain is the diatom. |
train/4335 | Is quartzite a mineral or a rock? | [
"mineral",
"rock"
] | 1 | Quartzite has the following properties:
made mostly of quartz
not made by living things
no fixed crystal structure
very hard
found in nature
solid | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | The properties of quartzite match the properties of a rock. So, quartzite is a rock. |
train/4336 | Which of the following could Erica's test show? | [
"how much the new turbine would weigh",
"whether the new turbine could produce 10% more electricity",
"if the new turbine could turn easily"
] | 1 | 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 | grade7 | 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/4337 | What can Ernest and Zane trade to each get what they want? | [
"Zane can trade his broccoli for Ernest's oranges.",
"Ernest can trade his tomatoes for Zane's broccoli.",
"Zane can trade his almonds for Ernest's tomatoes.",
"Ernest can trade his tomatoes for Zane's carrots."
] | 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.
Ernest and Zane open their lunch boxes in the school cafeteria. Neither Ernest nor Zane got everything that they wanted. The tabl... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Ernest wants broccoli. Zane 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/4338 | Is a plate a solid, a liquid, or a gas? | [
"a gas",
"a solid",
"a liquid"
] | 1 | closed choice | grade2 | natural science | physics | States of matter | Classify matter as solid, liquid, or gas | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a shape of its own.
Some solids can be bent or broken easily. Others are hard to bend or break.
A glass cup is a solid. A sock is also a solid.
When matter i... | A plate is a solid. If someone drops a plate, it may break into pieces. But each piece will still have a size and shape of its own. | |
train/4339 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 2.",
"The magnetic force is weaker in Pair 1.",
"The strength 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 | 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/4340 | Which of the following best describes a community in a small lake in Wisconsin? | [
"the insects, the water milfoil, and the nutrients",
"a school of bluegill fish",
"the water milfoil, the American lotus, and the water purslane"
] | 2 | Read the passage. Then answer the question below.
In a small lake in Wisconsin, aquatic plants such as water milfoil, American lotus, and water purslane grow along the shoreline. These plants help to keep the lake clean by absorbing substances that can pollute the water. The plants also provide oxygen to aquatic anima... | closed choice | grade7 | natural science | biology | Ecosystems | Describe populations, communities, and ecosystems | In an environment, organisms interact with each other and with their nonliving surroundings. To help describe these interactions, ecologists use specific terms for different types of groups.
A single organism is an individual. Individuals of the same species that live in the same place are part of a population.
Multipl... | |
train/4341 | What is the capital of Delaware? | [
"Wilmington",
"Augusta",
"Dover",
"Boston"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/4342 | What is the capital of Louisiana? | [
"Baton Rouge",
"New Orleans",
"Charlotte",
"Little Rock"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Baton Rouge is the capital of Louisiana. | ||
train/4343 | Which solution has a higher concentration of blue particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each blue 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 blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/4344 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 1.",
"The magnetic force is weaker in Pair 2.",
"The strength of the magnetic force is the same in both pairs."
] | 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. | 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/4345 | Select the organism in the same genus as the European nightjar. | [
"Larus michahellis",
"Caprimulgus macrurus",
"Goura scheepmakeri"
] | 1 | This organism is a European nightjar. Its scientific name is Caprimulgus europaeus. | 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 European nightjar's scientific name is Caprimulgus europaeus. The first word of its scientific name is Caprimulgus.
Larus michahellis is in the genus Larus. The first word of its scientific name is Larus. So, Larus michahellis and Caprimulgus europaeus are not in the same genus.
Caprimulgus macrurus is in the genus C... |
train/4346 | Which solution has a higher concentration of blue particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each blue ball represents one particle of solute. | closed choice | grade8 | 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 blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/4347 | Is the following statement about our solar system true or false?
Earth's volume is more than ten times as great as Mars's volume. | [
"false",
"true"
] | 0 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of ten times the volume of Mars.
Then compare the result to the volume of Earth. The volume of Earth is 1.08 x 10^12 km^3, which is less than 1.63 x 10^12 km^3. So, Earth's volume is less than ten times as great as Mars's volume. |
train/4348 | What is the capital of Delaware? | [
"Trenton",
"Georgetown",
"Dover",
"Tallahassee"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/4349 | Which animal's skin is also adapted for survival in cold places? | [
"armadillo lizard",
"snowy owl"
] | 1 | es live in the cold Arctic tundra. The 's skin is adapted to help the animal survive in cold places.
Figure: Arctic fox. | 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 Arctic fox.
The Arctic fox has thick fur covering its skin. Its skin is adapted for survival in cold places. The Arctic fox uses its fur to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
The snowy owl has a thick coat of feathers covering... |
train/4350 | What is the capital of New York? | [
"Albany",
"Jefferson City",
"New York City",
"Augusta"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Albany is the capital of New York. | ||
train/4351 | Select the organism in the same species as the blue jay. | [
"Cyanocitta stelleri",
"Cyanocitta cristata",
"Ardea goliath"
] | 1 | This organism is a blue jay. Its scientific name is Cyanocitta 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 blue jay's scientific name is Cyanocitta cristata.
Ardea goliath does not have the same scientific name as a blue jay. So, Cyanocitta cristata and Ardea goliath are not in the same species.
Cyanocitta cristata is in the same genus as Cyanocitta stelleri, but they are not in the same species.
Organisms in the same spe... |
train/4352 | Select the reptile below. | [
"cane toad",
"box turtle"
] | 1 | Reptiles have scaly, waterproof skin. Most reptiles live on land. A western rattlesnake is an example of a reptile. | 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 box turtle is a reptile. It has scaly, waterproof skin.
Box turtles can live to be over 100 years old!
A cane toad is an amphibian. It has moist skin and begins its life in water.
Toads do not have teeth! They swallow their food whole. |
train/4353 | Which solution has a higher concentration of pink particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | grade8 | 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/4354 | 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. | 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 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/4355 | Which air temperature was measured within the outlined area shown? | [
"-13°C",
"-1°C",
"-4°C"
] | 0 | The map below shows air temperatures in the lower atmosphere on October 28, 2016. The outlined area shows an air mass that influenced weather in Asia on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Laboratory... | closed choice | grade6 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show air temperatures.
The map's legend tells you the temperature that each color represents. Colors on the left in the legend represent lower temperatures than colors on the right. For ... | Look at the colors shown within the outlined area. Then, use the legend to determine which air temperatures those colors represent.
10°C.
-13°C is within this range.
-4°C and -1°C are outside of this range. |
train/4356 | Which property do these four objects have in common? | [
"flexible",
"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 rough object feels scratchy when you touch it. All four objects are rough.
A flexible object can be folded or bent without breaking easily. The sandpaper is flexible, but the sidewalk and the rock are not.
Potato chips have a salty taste. The pinea... |
train/4357 | What is the capital of Pennsylvania? | [
"Montpelier",
"Frankfort",
"Harrisburg",
"Louisville"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Harrisburg is the capital of Pennsylvania. | ||
train/4358 | Which property do these four objects have in common? | [
"sticky",
"salty",
"stretchy"
] | 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.
A stretchy object gets longer when you pull on it. The melted marshmallow is stretchy, but the ice cream sundae is not.
Potato chips have a salty taste. The ice cream sundae, the jam, and the melted marshmallow are not salty.
A sticky object can atta... |
train/4359 | Why might feeding offspring during mouthbrooding increase the reproductive success of a female blunthead cichlid? Complete the claim below that answers this question and is best supported by the passage.
Feeding offspring during mouthbrooding increases the chances that (). | [
"the female will become weak and unhealthy",
"the female's offspring will survive",
"the female will hold more offspring in her mouth"
] | 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.
Blunthead cichlids (SIK-lids) are fish that live in Lake Tanganyika in Eastern Africa. After a female blunthead cichlid lays eggs, she holds the egg... | 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 feeding offspring during mouthbrooding. Use this information to determine why this behavior can increase the reproductive success of the female blunthead cichlid.
Choice "Blunthead cichlids (SIK-lids) are fish that live in Lake Tanganyika in Eastern Africa. ... |
train/4360 | Which air temperature was measured within the outlined area shown? | [
"-4°C",
"5°C",
"-20°C"
] | 0 | The map below shows air temperatures in the lower atmosphere on November 12, 2015. The outlined area shows an air mass that influenced weather in Europe on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Laborat... | closed choice | grade6 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show air temperatures.
The map's legend tells you the temperature that each color represents. Colors on the left in the legend represent lower temperatures than colors on the right. For ... | Look at the colors shown within the outlined area. Then, use the legend to determine which air temperatures those colors represent.
15°C and 0°C.
-4°C is within this range.
-20°C and 5°C are outside of this range. |
train/4361 | What is the capital of Virginia? | [
"Austin",
"Oklahoma City",
"Arlington",
"Richmond"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Richmond is the capital of Virginia. | ||
train/4362 | Which of the following could Jenny's test show? | [
"how much the drone weighed with the blade guards",
"if adding the blade guards made the drone fly poorly",
"if the blade guards would break in a crash"
] | 1 | 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/4363 | Select the organism in the same genus as the agile wallaby. | [
"Macropus rufus",
"Ovis aries",
"Castor fiber"
] | 0 | This organism is an agile wallaby. Its scientific name is Macropus agilis. | 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... | An agile wallaby's scientific name is Macropus agilis. The first word of its scientific name is Macropus.
Ovis aries is in the genus Ovis. The first word of its scientific name is Ovis. So, Ovis aries and Macropus agilis are not in the same genus.
Macropus rufus is in the genus Macropus. The first word of its scientifi... |
train/4364 | What is the capital of Wyoming? | [
"Concord",
"Phoenix",
"Denver",
"Cheyenne"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/4365 | Which better describes the Great Victoria Desert ecosystem? | [
"It has a small amount of rain. It also has dry, thin soil.",
"It has mostly small plants. It also has only a few types of organisms."
] | 0 | Figure: Great Victoria Desert.
The Great Victoria Desert is a hot desert ecosystem located in Western Australia and South Australia. | 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 hot desert is a type of ecosystem. Hot deserts have the following features: a small amount of rain, dry, thin soil, and many different types of organisms. So, the Great Victoria Desert has a small amount of rain. It also has dry, thin soil. |
train/4366 | 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."
] | 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 | 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 2 than in Pair 1. So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1. |
train/4367 | Is the air from a leaf blower a solid, a liquid, or a gas? | [
"a solid",
"a liquid",
"a gas"
] | 2 | closed choice | grade4 | natural science | physics | States of matter | Identify and sort solids, liquids, and gases | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a... | The air from a leaf blower is a gas. A gas expands to fill a space.
A leaf blower uses a fan to blow air out. When the air leaves the leaf blower, the air expands to fill a much larger space. | |
train/4368 | Based on the Venn diagram, which animal has fins and breathes air? | [
"a whale",
"a fish"
] | 0 | This Venn diagram shows information about some sea animals. | closed choice | grade5 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | In a Venn diagram, each circle shows things that are true for a particular topic. The middle, where the two circles overlap, shows things that are true for both topics. This Venn diagram shows information about some sea animals.
The detail whale appears in the has fins circle and in the breathes air circle. This tells ... |
train/4369 | What is the probability that an American curl cat produced by this cross will be heterozygous for the ear type gene? | [
"0/4",
"3/4",
"2/4",
"4/4",
"1/4"
] | 2 | In a group of American curl cats, some individuals have curled ears and others have straight ears. In this group, the gene for the ear type trait has two alleles. The allele for straight ears (e) is recessive to the allele for curled ears (E).
This Punnett square shows a cross between two American curl cats. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | |
train/4370 | Which animal's feet are also adapted for sticking to smooth surfaces? | [
"domestic cat",
"slender-legged tree frog"
] | 1 | House geckos are found in most warm places around the world. Many s live inside people's houses. They are good at climbing walls and ceilings. The feet of the are adapted for sticking to smooth surfaces.
Figure: house gecko. | closed choice | grade3 | 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 house gecko.
The house gecko has wide, sticky toes. Its feet are adapted for sticking to smooth surfaces. The house gecko uses its toes to walk on the smooth surfaces of leaves without slipping.
Now look at each animal. Figure out which animal has a similar adaptation.
The slender-legged tree... |
train/4371 | Based on the timeline, which statement is true? | [
"The Declaration of Independence was signed before the Revolutionary War began.",
"The Declaration of Independence was signed after the Revolutionary War ended.",
"The Second Continental Congress was established after the Revolutionary War began."
] | 2 | Look at the timeline of events from the Revolutionary War. Then answer the question below. | closed choice | grade8 | social science | us-history | The American Revolution | The Revolutionary War: struggle for independence | ||
train/4372 | What is the probability that a rainbow trout produced by this cross will be homozygous dominant for the body color gene? | [
"1/4",
"0/4",
"2/4",
"4/4",
"3/4"
] | 1 | In a group of rainbow trout, some individuals have a greenish-brown body and others have a blue body. In this group, the gene for the body color trait has two alleles. The allele for a greenish-brown body (B) is dominant over the allele for a blue body (b).
This Punnett square shows a cross between two rainbow trout. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | |
train/4373 | What is the capital of Nebraska? | [
"Omaha",
"Lincoln",
"Jefferson City",
"Lansing"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Lincoln is the capital of Nebraska. | ||
train/4374 | Which statement describes the Serengeti National Park ecosystem? | [
"It has soil that is poor in nutrients.",
"It has cool summers and long, cold winters."
] | 0 | Figure: Serengeti National Park.
Serengeti National Park is a savanna grassland ecosystem in Tanzania, a country in eastern Africa. Many types of animals migrate through the park each year. | closed choice | grade7 | 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 savanna grassland is a type of ecosystem. Savanna grasslands have the following features: warm summers and warm winters, a rainy season and a dry season, and soil that is poor in nutrients. So, the following statements describe the Serengeti National Park ecosystem: warm summers and warm winters, a rainy season and a... |
train/4375 | Identify the question that Mateo's experiment can best answer. | [
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?",
"Can pennies hold more drops of pure water or water mixed with hand soap?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Mateo used a dropper to put equal-sized drops of pure water, one at a time, onto a penny. The drops stayed together and formed a dome on the penny's surface. Mateo recorded the number of drops he could add before the wa... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4376 | Which property do these four objects have in common? | [
"opaque",
"sweet",
"translucent"
] | 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 translucent object lets light through. But you cannot see clearly through a translucent object. All four objects are translucent.
An opaque object does not let light through. None of the objects are opaque.
Sugar has a sweet taste. The honey is swe... |
train/4377 | Which solution has a higher concentration of blue particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 0 | The diagram below is a model of two solutions. Each blue 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 blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/4378 | What is the name of the colony shown? | [
"Virginia",
"Michigan",
"Kentucky",
"Maryland"
] | 0 | closed choice | grade7 | social science | us-history | Colonial 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/4379 | What is the capital of New Mexico? | [
"Olympia",
"Salem",
"Denver",
"Santa Fe"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Santa Fe is the capital of New Mexico. | ||
train/4380 | What is the capital of Colorado? | [
"Sacramento",
"Phoenix",
"Cheyenne",
"Denver"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Denver is the capital of Colorado. | ||
train/4381 | What is the name of the colony shown? | [
"Ohio",
"Virginia",
"Pennsylvania",
"South Carolina"
] | 2 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Pennsylvania. | ||
train/4382 | Which is this organism's scientific name? | [
"frilled lizard",
"Chlamydosaurus kingii"
] | 1 | This organism is a frilled lizard. It is also called Chlamydosaurus kingii. | closed choice | grade8 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Chlamydosaurus kingii is written in italics. The first word is capitalized, and the second word is not.
So, Chlamydosaurus kingii is the scientific name. |
train/4383 | 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."
] | 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 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 2 than in Pair 1. So, the magnitud... |
train/4384 | Which solution has a higher concentration of yellow particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 1 | The diagram below is a model of two solutions. Each yellow 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 yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... |
train/4385 | What evidence of a volcanic eruption does this picture show? | [
"There is snow on the volcano.",
"There is smoke coming out of the volcano."
] | 1 | This picture was taken during a volcanic eruption. A volcanic eruption happens when melted rock comes out from under the ground. | closed choice | grade2 | natural science | earth-science | Earth events | Find evidence of changes to Earth's surface | Evidence is information that tells you something happened.
How do you look for evidence of a change to Earth's surface?
There are many ways to find evidence of a change to Earth's surface. One way is to look at a picture that was taken after the change.
Here are some examples of what the evidence for different changes ... | |
train/4386 | What is the capital of Connecticut? | [
"Hartford",
"Providence",
"Bridgeport",
"Cedar Rapids"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Hartford is the capital of Connecticut. | ||
train/4387 | Which bird's beak is also adapted to catch insects? | [
"military macaw",
"common swift"
] | 1 | Superb fairywrens eat insects and other small invertebrates. The shape of the 's beak is adapted to catch insects.
Figure: superb fairywren. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the superb fairywren.
A short, thin beak is light and easy to move. The superb fairywren uses its beak to grab fast-moving insects while flying.
Now look at each bird. Figure out which bird has a similar adaptation.
The common swift has a short, thin beak. Its beak is adapted to catch insects.
Th... |
train/4388 | Which animal's legs are also adapted for wading? | [
"kookaburra",
"painted stork"
] | 1 | Flamingos live near marshes, rivers, and oceans. They eat small crustaceans that live in shallow water. Flamingos get their food by walking through water, or wading.
The 's legs are adapted for wading. They are lightweight and keep the bird's body above the water.
Figure: flamingo. | closed choice | grade4 | 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 flamingo.
Long legs help the flamingo keep its body above the surface of the water while wading. Thin legs are easier to move through the water.
Now look at each animal. Figure out which animal has a similar adaptation.
The painted stork has long, thin legs. Its legs are adapted for wading.
T... |
train/4389 | Identify the question that Florence's experiment can best answer. | [
"Does the amount of water in a glass affect whether eggs sink or float in the water?",
"Are eggs more likely to float in fresh water or salty water?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Florence poured four ounces of water into each of six glasses. Florence dissolved one tablespoon of salt in each of three glasses, and did not add salt to the other three. Then, Florence placed an egg in one glass and o... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4390 | Which property do these two objects have in common? | [
"smooth",
"slippery"
] | 0 | 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 slippery object is hard to hold onto or stand on. The bowling ball is slippery, but the wooden ruler is not.
A smooth object is not scratchy or rough. Both objects are smooth.
The property that both objects have in common is smooth. |
train/4391 | Which state is highlighted? | [
"Michigan",
"Iowa",
"Illinois",
"Ohio"
] | 1 | closed choice | grade5 | social science | geography | States | Identify states of the Midwest | This state is Iowa. | ||
train/4392 | Which ocean is highlighted? | [
"the Pacific Ocean",
"the Southern Ocean",
"the Indian Ocean",
"the Atlantic Ocean"
] | 2 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Indian Ocean. | |
train/4393 | Identify the question that Greg's experiment can best answer. | [
"Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?",
"Does temperature affect how much bacteria can grow in liquid?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Greg mixed bacteria into a nutrient-rich liquid where the bacteria could grow. He poured four ounces of the mixture into each of ten glass flasks. In five of the ten flasks, he also added one teaspoon of cinnamon. He al... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4394 | Which material is this jar made of? | [
"glass",
"rock"
] | 0 | closed choice | grade2 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the jar.
The jar is made of two different materials. The lid is made of metal. The rest of the jar is made of glass. | |
train/4395 | Is the following statement about our solar system true or false?
Earth is the largest planet that is made mainly of rock. | [
"false",
"true"
] | 1 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that Mercury, Venus, Earth, and Mars are the planets made mainly of rock. Of these planets, Earth is the largest. So, Earth is the largest planet that is made mainly of rock. |
train/4396 | Which of these continents does the equator intersect? | [
"Asia",
"Australia",
"Antarctica"
] | 0 | 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 Asia. It does not intersect Australia or Antarctica. | |
train/4397 | What is the capital of Florida? | [
"Tallahassee",
"Orlando",
"Baton Rouge",
"Tampa"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Tallahassee is the capital of Florida. | ||
train/4398 | Which solution has a higher concentration of yellow particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 0 | The diagram below is a model of two solutions. Each yellow 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 yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... |
train/4399 | Which country is highlighted? | [
"Vanuatu",
"Tuvalu",
"Fiji",
"Solomon Islands"
] | 2 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Fiji. |
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