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train/400 | What is the capital of Colorado? | [
"Saint Paul",
"Colorado Springs",
"Denver",
"Juneau"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/401 | The United States has a federal system. Based on these definitions, which of these statements would most likely be made by a person who lives under a federal system? | [
"My national government officials decide most issues that come up.",
"Both my state and national government officials have power over important issues.",
"I only pay attention to state politics since the national government has almost no power."
] | 1 | Think about the name of the United States of America. As the name shows, the country has both a united national government and a collection of state governments. In the following questions, you will learn about the relationship between the national government and state governments. You will also learn about how state a... | closed choice | grade6 | social science | civics | Government | State and local government | ||
train/402 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the right than to the left",
"to the left than to the right"
] | 0 | The diagram below shows a solution with one solute. Each solute particle is represented by a purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 6 solute particles on the left side of the membrane and 2 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/403 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample B",
"sample A"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in sample A has more mass than each particle in sample B. The particles in sample A also have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average ... |
train/404 | What is the capital of Iowa? | [
"Cedar Rapids",
"Frankfort",
"Des Moines",
"Davenport"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Des Moines is the capital of Iowa. | ||
train/405 | What is the capital of California? | [
"Helena",
"Sacramento",
"San Francisco",
"Carson City"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Sacramento is the capital of California. | ||
train/406 | Which of the following could Aisha and Lily'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/407 | Identify the question that Lola'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.
Lola 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 into ea... | 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/408 | Which better describes the Mojave Desert ecosystem? | [
"It has dry, thin soil. It also has many different types of organisms.",
"It has a small amount of rain. It also has only a few types of organisms."
] | 0 | Figure: Mojave Desert.
The Mojave Desert is a desert ecosystem located mostly in Southern California. | 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 desert is a type of ecosystem. Deserts have the following features: a small amount of rain, dry, thin soil, and many different types of organisms. So, the Mojave Desert has dry, thin soil. It also has many different types of organisms. |
train/409 | What is the capital of Illinois? | [
"Indianapolis",
"Chicago",
"Springfield",
"Olympia"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Springfield is the capital of Illinois. | ||
train/410 | Select the fish below. | [
"salmon",
"kangaroo"
] | 0 | Fish live underwater. They have fins, not limbs. A catfish is an example of a fish. | 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 salmon is a fish. It lives underwater. It has fins, not limbs.
A kangaroo is a mammal. It has fur and feeds its young milk. |
train/411 | 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 | grade5 | natural science | physics | Magnets | 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/412 | Which solution has a higher concentration of pink particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 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/413 | Select the organism in the same species as the plains zebra. | [
"Macropus rufus",
"Equus quagga",
"Cervus canadensis"
] | 1 | This organism is a plains zebra. Its scientific name is Equus quagga. | 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 plains zebra's scientific name is Equus quagga.
Cervus canadensis does not have the same scientific name as a plains zebra. So, Equus quagga and Cervus canadensis are not in the same species.
Equus quagga has the same scientific name as a plains zebra. So, these organisms are in the same species.
Macropus rufus does ... |
train/414 | Which solution has a higher concentration of blue particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 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/415 | Select the organism in the same genus as the bighorn sheep. | [
"Macropus agilis",
"Hystrix cristata",
"Ovis dalli"
] | 2 | This organism is a bighorn sheep. Its scientific name is Ovis canadensis. | 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 bighorn sheep's scientific name is Ovis canadensis. The first word of its scientific name is Ovis.
Ovis dalli is in the genus Ovis. The first word of its scientific name is Ovis. So, Ovis dalli and Ovis canadensis are in the same genus.
Hystrix cristata is in the genus Hystrix. The first word of its scientific name i... |
train/416 | Which property do these four objects have in common? | [
"flexible",
"smooth",
"opaque"
] | 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.
An opaque object does not let light through. The baseball bat and the ceramic mug are opaque, but the water pitcher is not.
A smooth object is not scratchy or rough. All four objects are smooth.
A flexible object can be folded or bent without breakin... |
train/417 | Which country is highlighted? | [
"Saint Vincent and the Grenadines",
"Barbados",
"Haiti",
"Grenada"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Vincent and the Grenadines. | ||
train/418 | What is the capital of Michigan? | [
"Lansing",
"Detroit",
"Billings",
"Grand Rapids"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Lansing is the capital of Michigan. | ||
train/419 | Which of the following could Pablo's test show? | [
"the amount of bacteria in the water before it was filtered",
"whether the filter was clogged",
"whether an inexpensive filter would become clogged more often"
] | 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/420 | Select the organism in the same species as the bighorn sheep. | [
"Ovis canadensis",
"Alouatta palliata",
"Alouatta caraya"
] | 0 | This organism is a bighorn sheep. Its scientific name is Ovis 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 bighorn sheep's scientific name is Ovis canadensis.
Alouatta caraya does not have the same scientific name as a bighorn sheep. So, Ovis canadensis and Alouatta caraya are not in the same species.
Ovis canadensis has the same scientific name as a bighorn sheep. So, these organisms are in the same species.
Alouatta pal... |
train/421 | Which country is highlighted? | [
"Fiji",
"Tonga",
"Papua New Guinea",
"Tuvalu"
] | 0 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Fiji. | ||
train/422 | Which animal is also adapted to be camouflaged in the snow? | [
"Arctic fox",
"screech owl"
] | 0 | Polar bears live in and around the cold Arctic Ocean. The is adapted to be camouflaged in the snow.
Figure: polar bear. | 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 polar bear.
The polar bear has white fur covering its body. It is adapted to be camouflaged in the snow. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
During the winter, the Arctic fox has white fur covering its body. It is a... |
train/423 | Which animal's feet are also adapted for grabbing prey? | [
"African crowned eagle",
"Malayan tapir"
] | 0 | Golden eagles eat fish, mammals, and other birds. The 's feet are adapted to grab prey.
Figure: golden eagle. | 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 golden eagle.
The golden eagle has long toes with sharp claws. Its feet are adapted for grabbing prey. The sharp claws can help the golden eagle attack and kill its prey. The long toes can help it hold on to its prey.
Now look at each animal. Figure out which animal has a similar adaptation.
... |
train/424 | 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 1.",
"The magnitude of the magnetic force is smaller 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, but some of them are different sizes and 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.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/425 | Which country is highlighted? | [
"the Dominican Republic",
"Haiti",
"Dominica",
"Cuba"
] | 0 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is the Dominican Republic.
Why does the Dominican Republic share its island with another country?
The Dominican Republic and Haiti share the island of Hispaniola. It is home to the earliest European settlements in the Americas. Christopher Columbus founded the first European settlement on the island in 149... | ||
train/426 | Is a fork a solid, a liquid, or a gas? | [
"a liquid",
"a solid",
"a gas"
] | 1 | closed choice | grade3 | 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 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... | A fork is a solid. You can bend a fork. But it will still have a size and shape of its own. | |
train/427 | What is the expected ratio of offspring with green peas to offspring with yellow peas? Choose the most likely ratio. | [
"0:4",
"3:1",
"2:2",
"1:3",
"4:0"
] | 2 | In a group of pea plants, some individuals have yellow peas and others have green peas. In this group, the gene for the pea color trait has two alleles. The allele for green peas (e) is recessive to the allele for yellow peas (E).
This Punnett square shows a cross between two pea plants. | 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 green peas or yellow peas, consider whether each phenotype is the dominant or recessive allele's version of the pea color trait. The question tells you that the e allele, which is for green peas, is recessive to the E allele, which is for yellow... |
train/428 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Yemen.
Yemen, a country in the Middle East, is located in the desert. It was humid in the southern part of the country on November 30 last year.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Yemen, a country in the Middle East, is located in the desert. It was humid in the southern part of the country on November 30 last year.
The underlined part of the passage tells you about the humidity in Yemen on a specific day last year. This passage describes the atmosphere at a certain p... |
train/429 | What is the capital of New Mexico? | [
"Cambridge",
"Salem",
"Santa Fe",
"Albuquerque"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Santa Fe is the capital of New Mexico. | ||
train/430 | Which statement describes the Mount Rainier National Park ecosystem? | [
"It has mostly small plants.",
"It has long, cold winters and short, cool summers.",
"It has soil that is rich in nutrients."
] | 1 | Figure: Mount Rainier National Park.
Mount Rainier National Park is a taiga ecosystem in Washington State. The park is named after a volcano called Mount Rainier, which is covered in glaciers. | closed choice | grade8 | 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 taiga is a type of ecosystem. Taigas have the following features: long, cold winters and short, cool summers, many evergreen trees, and soil that is poor in nutrients. So, the following statement describes the Mount Rainier National Park ecosystem: long, cold winters and short, cool summers, many evergreen trees, and... |
train/431 | Select the fish below. | [
"cane toad",
"salmon",
"water buffalo",
"harbor seal"
] | 1 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A hammerhead shark is an example of a fish. | 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. | A salmon is a fish. It lives underwater. It has fins, not limbs.
Unlike most other fish, salmon can live in both fresh water and salt water.
A harbor seal is a mammal. It has fur and feeds its young milk.
Seals have flippers instead of arms! They use their flippers to swim underwater or to crawl on the beach.
A water b... |
train/432 | Look at the models of molecules below. Select the elementary substance. | [
"chlorine",
"propane",
"silane"
] | 0 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/433 | Which bird's beak is also adapted to get nectar out of long flowers? | [
"violet sabrewing",
"common shelduck"
] | 0 | Rufous hummingbirds live in the woodlands and meadows of western North America. The shape of the 's beak is adapted to get nectar out of long flowers.
Figure: rufous hummingbird. | 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 rufous hummingbird.
The rufous hummingbird has a long, thin beak. Its beak is adapted to get nectar out of long flowers. The rufous hummingbird's long, thin beak can reach deep into the flowers.
Now look at each bird. Figure out which bird has a similar adaptation.
The violet sabrewing has a ... |
train/434 | Which country is highlighted? | [
"the Federated States of Micronesia",
"Tonga",
"Kiribati",
"Palau"
] | 3 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Palau. | ||
train/435 | What is the capital of Vermont? | [
"Burlington",
"Minneapolis",
"Augusta",
"Montpelier"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Montpelier is the capital of Vermont. | ||
train/436 | Complete the sentence.
The African elephant is the () land animal in the world. | [
"smallest",
"largest"
] | 1 | This picture shows an African elephant. | closed choice | grade2 | natural science | literacy-in-science | Animals | Seed disperser: African elephant | African elephants are the largest living land animals. A fully grown male African elephant can weigh up to 14,000 pounds. That's about as much as four small cars! | |
train/437 | Which animal's skin is better adapted as a warning sign to ward off predators? | [
"lechwe",
"flamboyant cuttlefish"
] | 1 | Golden dart frogs have poisonous glands in their brightly colored skin. The bright color serves as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: golden dart frog. | 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 golden dart frog.
The golden dart 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 golden dart frog is poisonous.
Now look at each animal. Figure out which animal has a similar adaptation.
The... |
train/438 | What is the expected ratio of offspring that have coat graying to offspring that do not have coat graying? Choose the most likely ratio. | [
"3:1",
"0:4",
"2:2",
"4:0",
"1:3"
] | 3 | This passage describes the coat graying trait in horses:
Your hair may turn gray or white as you grow older. Some horses go through a similar process called coat graying as they age. These horses are usually a darker color, such as brown or black, when they are born. Over time, the hairs of their coats lose their origi... | 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 coat graying, consider whether each phenotype is the dominant or recessive allele's version of the coat graying trait. The question tells you that the G allele, which is for having a graying coat, is dominant over the g allele,... |
train/439 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sample B mus... |
train/440 | What type of rock is conglomerate? | [
"metamorphic",
"sedimentary"
] | 1 | Conglomerate is a type of rock. It is made up of grains of many different sizes, such as sand, mud, and pebbles. Conglomerate forms when layers of these sediments are pressed together to form rock. | closed choice | grade3 | natural science | earth-science | Rocks and minerals | Classify rocks as igneous, sedimentary, or metamorphic | Igneous rock is formed when melted rock cools and hardens into solid rock. This type of change can occur at Earth's surface or below it.
Sedimentary rock is formed when layers of sediment are pressed together to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when a rock is chang... | Conglomerate is a sedimentary rock. Like other sedimentary rocks, it forms from layers of sediment.
Sand, mud, and pebbles are all types of sediment. They are deposited in places like riverbeds. Sediments like sand and mud usually build up in layers. Over time, the top layers press down on the bottom layers. Sedimentar... |
train/441 | Which country is highlighted? | [
"Australia",
"New Zealand",
"Solomon Islands",
"Papua New Guinea"
] | 0 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Australia.
Is Australia a country or a continent?
Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead. | ||
train/442 | Which country is highlighted? | [
"the Marshall Islands",
"Solomon Islands",
"Australia",
"New Zealand"
] | 1 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Solomon Islands. | ||
train/443 | What is the name of the colony shown? | [
"Michigan",
"Massachusetts",
"Rhode Island",
"Connecticut"
] | 3 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Connecticut. | ||
train/444 | Which bird's beak is also adapted to get nectar out of long flowers? | [
"malachite sunbird",
"snowy owl"
] | 0 | Purple honeycreepers live in the forests of South America. The shape of the 's beak is adapted to get nectar out of long flowers.
Figure: purple honeycreeper. | 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 purple honeycreeper.
The purple honeycreeper has a long, thin beak. Its beak is adapted to get nectar out of long flowers. The purple honeycreeper's long, thin beak can reach deep into the flowers.
Now look at each bird. Figure out which bird has a similar adaptation.
The malachite sunbird ha... |
train/445 | 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."
] | 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 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,... | 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.
Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are... |
train/446 | What is the capital of Indiana? | [
"Indianapolis",
"Des Moines",
"Fort Wayne",
"Jefferson City"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Indianapolis is the capital of Indiana. | ||
train/447 | Which of the following could Hansen's test show? | [
"how much athletes would sweat in the fabric",
"how long it would take the sample fabric to dry after it absorbed one drop of water",
"if the sample fabric would absorb one drop of water in less than one second"
] | 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/448 | Which property do these four objects have in common? | [
"opaque",
"flexible",
"shiny"
] | 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.
An opaque object does not let light through. All four objects are opaque.
A flexible object can be folded or bent without breaking easily. The tin foil is flexible, but the bowling ball and the metal nail are not.
A shiny object reflects a lot of lig... |
train/449 | Which property matches this object? | [
"shiny",
"bumpy"
] | 1 | 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 bumpy object is covered in lumps and bumps. The log is bumpy.
A shiny object reflects a lot of light. The log is not shiny. |
train/450 | Which ocean is highlighted? | [
"the Atlantic Ocean",
"the Pacific Ocean",
"the Southern Ocean",
"the Arctic Ocean"
] | 0 | closed choice | grade7 | 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 Atlantic Ocean. | |
train/451 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 0 | 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 north pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/452 | 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 1.",
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude 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, 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/453 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 1 | Figure: Nassau.
Nassau, a city in the Bahamas, has many tourists each winter. Because the city is in the tropics, the air is usually humid.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Nassau, a city in the Bahamas, has many tourists each winter. Because the city is in the tropics, the air is usually humid.
The underlined part of the passage tells you about the usual pattern of humidity in Nassau. This passage does not describe what the weather is like on a particular day.... |
train/454 | Which animal is also adapted to be camouflaged among dead leaves? | [
"fantastic leaf-tailed gecko",
"Arctic wolf"
] | 0 | Leaf-mimic grasshoppers live in tropical forests around the world. This grasshopper is adapted to be camouflaged among dead leaves.
Figure: leaf-mimic grasshopper. | 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 leaf-mimic grasshopper.
The leaf-mimic grasshopper has a reddish-brown body. 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 has a similar adaptation.
The f... |
train/455 | What is the capital of Nebraska? | [
"Topeka",
"Lincoln",
"Omaha",
"Pierre"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Lincoln is the capital of Nebraska. | ||
train/456 | Select the organism in the same species as the garden hyacinth. | [
"Hyacinthus orientalis",
"Ovis orientalis",
"Nerodia cyclopion"
] | 0 | This organism is a garden hyacinth. Its scientific name is Hyacinthus orientalis. | 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 garden hyacinth's scientific name is Hyacinthus orientalis.
Nerodia cyclopion does not have the same scientific name as a garden hyacinth. So, Hyacinthus orientalis and Nerodia cyclopion are not in the same species.
Hyacinthus orientalis has the same scientific name as a garden hyacinth. So, these organisms are in th... |
train/457 | Which property do these four objects have in common? | [
"slippery",
"smooth",
"hard"
] | 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 hard object does not change shape when pressed or squeezed. The wet ice cube, the magnifying glass, and the silver ring are hard, but the balloon is not.
A smooth object is not scratchy or rough. All four objects are smooth.
A slippery object is ha... |
train/458 | What is the name of the colony shown? | [
"Florida",
"Indiana",
"Connecticut",
"New Jersey"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Jersey. | ||
train/459 | Which property matches this object? | [
"scratchy",
"shiny"
] | 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 scratchy object is rough and itchy against your skin. The velcro is scratchy.
A shiny object reflects a lot of light. The velcro is not shiny. |
train/460 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sample B mus... |
train/461 | Identify the question that Simon's experiment can best answer. | [
"Does temperature affect how much bacteria can grow in liquid?",
"Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Simon 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 a... | 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/462 | Why might raising cubs with other lionesses in a pride increase an African lioness's reproductive success? Complete the claim below that answers this question and is best supported by the passage.
Raising cubs with other lionesses in a pride increases the chances that (). | [
"the lioness's cubs will be around other cubs",
"the lioness's cubs will survive attacks",
"the lioness will feed the cubs of other lionesses"
] | 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.
African lions live in groups called prides. In a pride, female lions, or lionesses, may give birth to cubs around the same time. When this happens, ... | 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 raising cubs with other lionesses in a pride. Use this information to determine why this behavior can increase the African lioness's reproductive success.
Choice "African lions live in groups called prides. In a pride, female lions, or lionesses, may give bi... |
train/463 | Identify the question that Erin'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.
Erin 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 into ea... | 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/464 | Identify the question that Brittany's experiment can best answer. | [
"Does the humidity level where tomato seeds are planted affect the number of tomato seedlings that grow?",
"Do more tomato seedlings grow when they are planted in soil with fertilizer compared to soil without fertilizer?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Brittany planted 25 tomato seeds one-half inch below the soil surface in each of six pots. Brittany added an equal amount of fertilizer to three of the six pots. She placed the pots in a plant growth chamber where all t... | 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/465 | What can Connor and Vicky trade to each get what they want? | [
"Connor can trade his tomatoes for Vicky's sandwich.",
"Vicky can trade her broccoli for Connor's oranges.",
"Vicky can trade her almonds for Connor's tomatoes.",
"Connor can trade his tomatoes for Vicky'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.
Connor and Vicky open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Connor wanted ... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Connor wanted broccoli in his lunch and Vicky was hoping for tomatoes. Look at the labeled part of the images.
Connor has tomatoes. Vicky 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/466 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, and the particles in both samples have the same average speed. So, the particles in both samples have the same average kinetic energy.
Because the particles in both samples have the same average kinetic energy, the samples must have the same temperature. |
train/467 | Which three months have the same average precipitation? | [
"December, January, and February",
"September, October, and November",
"June, July, and August"
] | 1 | 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 Chicago, look at the graph.
Choice "Jan" is incorrect.
Choice "Feb" is incorrect.
Choice "Jun" is incorrect.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
Choice "Dec" is incorrect.
C... |
train/468 | 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 | 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/469 | Which of these oceans does the prime meridian intersect? | [
"the Arctic Ocean",
"the Pacific Ocean",
"the Indian Ocean"
] | 0 | 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 the Arctic Ocean. It does not intersect the Indian Ocean or the Pacific Ocean. | |
train/470 | Is grape juice a solid, a liquid, or a gas? | [
"a gas",
"a liquid",
"a solid"
] | 1 | closed choice | grade3 | 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 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... | Grape juice is a liquid. A liquid takes the shape of any container it is in.
If you pour grape juice into a different container, the grape juice will take the shape of that container. But the grape juice will still take up the same amount of space. | |
train/471 | Select the organism in the same species as the blue jay. | [
"Pelecanus occidentalis",
"Cyanocitta stelleri",
"Cyanocitta cristata"
] | 2 | This organism is a blue jay. Its scientific name is Cyanocitta cristata. | 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 blue jay's scientific name is Cyanocitta cristata.
Cyanocitta cristata is in the same genus as Cyanocitta stelleri, but they are not in the same species.
Organisms in the same species have the same scientific names. Cyanocitta cristata and Cyanocitta stelleri are different species within the same genus.
Pelecanus occ... |
train/472 | What is the name of the colony shown? | [
"Ohio",
"Michigan",
"West Virginia",
"New Hampshire"
] | 3 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Hampshire.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | ||
train/473 | What can Mackenzie and Zane trade to each get what they want? | [
"Mackenzie can trade her tomatoes for Zane's broccoli.",
"Zane can trade his broccoli for Mackenzie's oranges.",
"Zane can trade his almonds for Mackenzie's tomatoes.",
"Mackenzie can trade her tomatoes for Zane's sandwich."
] | 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.
Mackenzie and Zane open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Mackenzie wa... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Mackenzie wanted broccoli in her lunch and Zane was hoping for tomatoes. Look at the labeled part of the images.
Mackenzie has tomatoes. Zane 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/474 | Which of these continents does the equator intersect? | [
"Europe",
"Asia",
"North America"
] | 1 | 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 North America or Europe. | |
train/475 | Which of these states is farthest south? | [
"Nebraska",
"Minnesota",
"Idaho",
"New Hampshire"
] | 0 | closed choice | grade2 | 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 south arrow is pointing. Nebraska is farthest south. | |
train/476 | Identify the question that Patty's experiment can best answer. | [
"Do more tomato seedlings grow when they are planted in soil with fertilizer compared to soil without fertilizer?",
"Does the humidity level where tomato seeds are planted affect the number of tomato seedlings that grow?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Patty planted 25 tomato seeds one-half inch below the soil surface in each of six pots. Patty added an equal amount of fertilizer to three of the six pots. She placed the pots in a plant growth chamber where all the see... | 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/477 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in sample A has more mass than each particle in sample B. The particles in sample A also have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average ... |
train/478 | Is rubber a mineral? | [
"yes",
"no"
] | 1 | Rubber has the following properties:
human-made
not a pure substance
solid
no fixed crystal structure | yes or no | grade5 | 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... | Rubber does not have all the properties of a mineral. So, rubber is not a mineral. |
train/479 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Taj Mahal.
The Taj Mahal receives over two million visitors each year. It is located in northern India, where monsoon rains fall each year between June and September.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
The Taj Mahal receives over two million visitors each year. It is located in northern India, where monsoon rains fall each year between June and September.
The underlined part of the passage tells you about the usual pattern of precipitation at the Taj Mahal. This passage does not describe w... |
train/480 | What is the capital of Delaware? | [
"Dover",
"Birmingham",
"Augusta",
"Chicago"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/481 | Which month has the lowest average temperature in Amsterdam? | [
"December",
"January",
"February"
] | 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 | To describe the average temperature trends in Amsterdam, look at the graph.
Choice "Feb" is incorrect.
Choice "Dec" is incorrect.
Choice "Jan" is incorrect.
The average temperature in February is around 2°C. This is the lowest average temperature of all of the months. | |
train/482 | Which ocean is highlighted? | [
"the Arctic Ocean",
"the Southern Ocean",
"the Pacific Ocean",
"the Atlantic Ocean"
] | 3 | closed choice | grade7 | 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 Atlantic Ocean. | |
train/483 | Is potassium feldspar a mineral or a rock? | [
"mineral",
"rock"
] | 0 | Potassium feldspar has the following properties:
glassy luster
pure substance
not made by organisms
naturally occurring
fixed crystal structure
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... | Potassium feldspar has all the properties of a mineral. So, potassium feldspar is a mineral. |
train/484 | Which property do these three objects have in common? | [
"yellow",
"slippery",
"fuzzy"
] | 1 | Select the best answer. | closed choice | grade3 | 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. | Look at each object.
For each object, decide if it has that property.
Yellow is a color.
This color is yellow. The jello and the yogurt are not yellow.
A fuzzy object is covered in soft hair. The jello and the icy sidewalk are not fuzzy.
A slippery object is hard to hold onto or stand on. All three objects are slippery... |
train/485 | Which of these states is farthest west? | [
"Arkansas",
"New Mexico",
"Florida",
"Virginia"
] | 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 west arrow is pointing. New Mexico is farthest west. | |
train/486 | Which property matches this object? | [
"breakable",
"soft"
] | 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 soft object changes shape when you squeeze it. The ceramic plate is not soft.
A breakable object will break into pieces if you drop it. The ceramic plate is breakable. |
train/487 | 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 | 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.
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/488 | What is the capital of Tennessee? | [
"Phoenix",
"Trenton",
"Topeka",
"Nashville"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Nashville is the capital of Tennessee. | ||
train/489 | What is the name of the colony shown? | [
"Delaware",
"New Jersey",
"South Carolina",
"North Carolina"
] | 0 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/490 | During this time, thermal energy was transferred from () to (). | [
"each aquarium . . . the surroundings",
"the surroundings . . . each aquarium"
] | 0 | Two identical aquariums were next to an open window. One aquarium had a plastic cover on it, and the other was uncovered. This table shows how the temperature of each aquarium changed over 1.5hours. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each aquarium decreased, which means that the thermal energy of each aquarium decreased. So, thermal energy was transferred from each aquarium to the surroundings. |
train/491 | Which animal's mouth is also adapted for bottom feeding? | [
"banded butterflyfish",
"bat ray"
] | 1 | Leopard sharks eat organisms such as crabs, shrimp, and fish. They are bottom feeders. Bottom feeders find their food at the bottom of rivers, lakes, and the ocean.
The 's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding.
Figure: leopard shark. | 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 an animal's mouth is one example of an adaptation. Animals' mouths can be adapted in different ways. For example, a large mouth with sharp teeth might help an animal tear ... | Look at the picture of the leopard shark.
The leopard shark's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding. The leopard shark uses its mouth to find food hidden in the sediment of the ocean floor.
Now look at each animal. Figure out which animal has a simila... |
train/492 | During this time, thermal energy was transferred from () to (). | [
"each bottle . . . the surroundings",
"the surroundings . . . each bottle"
] | 1 | Two bottles of soda were sitting on a porch on a hot day. The two bottles were identical, except that one bottle was made of brown glass and one bottle was made of clear glass. This table shows how the temperature of each bottle changed over 25minutes. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each bottle increased, which means that the thermal energy of each bottle increased. So, thermal energy was transferred from the surroundings to each bottle. |
train/493 | In this experiment, which were part of an experimental group? | [
"the kites with tails",
"the kites without tails"
] | 0 | The passage below describes an experiment.
Cameron and his friend Elizabeth flew nylon kites on the beach. They wondered if putting a tail on a kite would affect how well the kite flew.
Cameron flew a kite that did not have a tail for five minutes. Then, he attached a four-foot-long tail and flew the kite for five mor... | 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, Cameron and Elizabeth investigated whether tails affect how well kites fly. So, the kites with tails were part of an experimental group.
There were no tails on the kites without tails. So, they were not part of an experimental group. |
train/494 | Which is the main persuasive appeal used in this ad? | [
"pathos (emotion)",
"logos (reason)",
"ethos (character)"
] | 1 | closed choice | grade7 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals:
Appeals to ethos, or character, show that the writer or speaker is trustworthy or is an authority on a subject. An ad that appeals to ethos might do one... | The ad appeals to logos, or reason. It uses a graph to display information and uses specific figures (2 x longer). | |
train/495 | What is the capital of Arkansas? | [
"Fayetteville",
"Austin",
"Little Rock",
"Baton Rouge"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Little Rock is the capital of Arkansas. | ||
train/496 | Select the organism in the same species as the common sheep. | [
"Castor fiber",
"Ovis aries",
"Alouatta caraya"
] | 1 | This organism is a common sheep. Its scientific name is Ovis aries. | 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 common sheep's scientific name is Ovis aries.
Alouatta caraya does not have the same scientific name as a common sheep. So, Ovis aries and Alouatta caraya are not in the same species.
Ovis aries has the same scientific name as a common sheep. So, these organisms are in the same species.
Castor fiber does not have the... |
train/497 | Which continent is highlighted? | [
"Antarctica",
"Asia",
"Australia",
"Europe"
] | 2 | 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 Australia. | |
train/498 | Is chalcopyrite a mineral? | [
"no",
"yes"
] | 1 | Chalcopyrite has the following properties:
not made by living things
solid
found in nature
pure substance
fixed crystal structure | 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... | Chalcopyrite has all the properties of a mineral. So, chalcopyrite is a mineral. |
train/499 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | 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: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
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