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train/2400 | What is the name of the colony shown? | [
"New Hampshire",
"Connecticut",
"New York",
"Rhode Island"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Rhode Island. | ||
train/2401 | What is the capital of Missouri? | [
"Jefferson City",
"Bismarck",
"Springfield",
"Fayetteville"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Jefferson City is the capital of Missouri. | ||
train/2402 | Select the organism in the same genus as the spot-billed pelican. | [
"Falco novaeseelandiae",
"Strix uralensis",
"Pelecanus crispus"
] | 2 | This organism is a spot-billed pelican. Its scientific name is Pelecanus philippensis. | 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 spot-billed pelican's scientific name is Pelecanus philippensis. The first word of its scientific name is Pelecanus.
Pelecanus crispus is in the genus Pelecanus. The first word of its scientific name is Pelecanus. So, Pelecanus crispus and Pelecanus philippensis are in the same genus.
Falco novaeseelandiae is in the ... |
train/2403 | Which of the following could Caleb's test show? | [
"how well the weather station would work when it was windy",
"if the weather station would work when the temperature was 50°C"
] | 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 | 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/2404 | Which of these continents does the equator intersect? | [
"Africa",
"Australia",
"Europe"
] | 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 Africa. It does not intersect Europe or Australia. | |
train/2405 | What is this pterosaur's scientific name? | [
"Pterodactylus antiquus",
"Vectidraco daisymorrisae"
] | 1 | This illustration shows the outline of a pterosaur, an ancient flying reptile. No pterosaurs are alive today—they are extinct. Daisy Morris, a four-year-old girl, discovered this pterosaur's fossil! The illustration shows which bone Daisy found. The pterosaur's scientific name refers to Daisy Morris. | closed choice | grade4 | natural science | biology | Scientific names | Origins of scientific names | When a scientist identifies a new organism, he or she chooses its scientific name.
Sometimes, an organism is named after the place where it was first found. Other times, an organism is named after the scientist who first identified it. Or, the scientific name might describe the organism's physical traits.
Many of the w... | This organism's scientific name refers to Daisy Morris.
The word daisymorrisae refers to Daisy Morris. So, this pterosaur's scientific name is Vectidraco daisymorrisae. |
train/2406 | Which animal is also adapted for flight? | [
"sea turtle",
"great blue heron"
] | 1 | Flamingos fly long distances every year in search of food and places to nest. They have wings instead of arms. Flamingos are adapted for flight.
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.
The flamingo has large, powerful wings. It is adapted for flight. Long, powerful wings help the flamingo travel long distances by air.
Now look at each animal. Figure out which animal has a similar adaptation.
The great blue heron has large, powerful wings. It is adapted for flight.... |
train/2407 | Which better describes the Lost City ecosystem? | [
"It has water at the bottom of the ocean. It also has no sunlight.",
"It has bright sunlight. It also has organisms that crawl or stick to the ground."
] | 0 | Figure: Lost City.
Lost City is a deep sea ecosystem in the mid-Atlantic Ocean. | 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 | The deep sea is a type of ecosystem. Deep sea ecosystems have the following features: water at the bottom of the ocean, no sunlight, and organisms that crawl or stick to the ground. So, Lost City has water at the bottom of the ocean. It also has no sunlight. |
train/2408 | Which better describes the Gran Sabana ecosystem? | [
"It has a rainy season and a dry season. It also has warm summers.",
"It has a rainy season and a dry season. It also has long, cold winters."
] | 0 | Figure: Gran Sabana.
The Gran Sabana is a savanna grassland ecosystem in southeastern Venezuela. | 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 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 Gran Sabana has a rainy season and a dry season. It also has warm summers. |
train/2409 | Which air temperature was measured within the outlined area shown? | [
"-2°C",
"5°C",
"12°C"
] | 1 | The map below shows air temperatures in the lower atmosphere on June 12, 2013. The outlined area shows an air mass that influenced weather in South America on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Labo... | 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.
The legend tells you that this air mass contained air with temperatures between 0°C and 10°C.
5°C is within this range.
-2°C and 12°C are outside of this range. |
train/2410 | Identify the question that Edgar's experiment can best answer. | [
"Can pennies hold more drops of pure water or water mixed with hand soap?",
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Edgar 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. Edgar 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/2411 | What is the capital of Oregon? | [
"Olympia",
"Salem",
"Denver",
"Boise"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Salem is the capital of Oregon. | ||
train/2412 | What is the capital of Hawaii? | [
"Olympia",
"Portland",
"Santa Fe",
"Honolulu"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Honolulu is the capital of Hawaii. | ||
train/2413 | As Coco pulls on the toy, what is the direction of the opposing force? | [
"toward Coco",
"away from Coco"
] | 1 | The text below describes a pair of opposing forces. Opposing forces act on an object in opposite directions. Read the text. Then answer the question below.
Two dogs, Rusty and Coco, play with a toy. Think about two of the forces that act on the toy:
Coco pulls toward herself.
Rusty pulls away from Coco. | closed choice | grade3 | natural science | physics | Force and motion | How do balanced and unbalanced forces affect motion? | A force is a push or a pull that acts on an object. Each force acts on an object in a certain direction. If two forces act on an object in opposite directions, they are called opposing forces. | Find the direction Coco pulls on the toy.
Two dogs, Rusty and Coco, play with a toy. Think about two of the forces that act on the toy:
Coco pulls toward herself.
Rusty pulls away from Coco.
The text tells you that Coco pulls toward herself. The opposite direction is away from Coco. So, the direction of the opposing fo... |
train/2414 | Which state is highlighted? | [
"Oklahoma",
"Mississippi",
"Tennessee",
"West Virginia"
] | 2 | closed choice | grade5 | social science | geography | States | Identify states of the Southeast | This state is Tennessee. | ||
train/2415 | Which of the following statements is true? | [
"Eye color is an example of a gene.",
"Genes affect traits."
] | 1 | Look at the image and read the text. Then, answer the question.
variation in the human eye color trait
All organisms inherit certain traits from their parents. Information about these inherited traits is found in genes. Genes are pieces of hereditary material that are passed from parents to offspring. An organism's gen... | closed choice | grade7 | natural science | biology | Genes to traits | Genes, proteins, and traits: understanding the genetic code | Genes affect traits.
Genes contain information about inherited traits.
All organisms have genes.
All organisms have genes that contain information about their inherited traits.
Eye color is an example of a gene.
An organism's eye color is affected by its genes. But eye color is not a gene. Eye color is a trait, which i... | |
train/2416 | Which better describes the Eastern Siberian Taiga ecosystem? | [
"It has short, cool summers. It also has many evergreen trees.",
"It has short, cool summers. It also has soil that is rich in nutrients."
] | 0 | Figure: East Siberian Taiga.
The Eastern Siberian Taiga is a taiga ecosystem in Russia. | 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 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 Eastern Siberian Taiga has short, cool summers. It also has many evergreen trees. |
train/2417 | Which solution has a higher concentration of purple particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 1 | The diagram below is a model of two solutions. Each purple 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 purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... |
train/2418 | Select the organism in the same species as the Steller's jay. | [
"Cyanocitta stelleri",
"Goura victoria",
"Larus occidentalis"
] | 0 | This organism is a Steller's jay. Its scientific name is Cyanocitta stelleri. | 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 Steller's jay's scientific name is Cyanocitta stelleri.
Cyanocitta stelleri has the same scientific name as a Steller's jay. So, these organisms are in the same species.
Goura victoria does not have the same scientific name as a Steller's jay. So, Cyanocitta stelleri and Goura victoria are not in the same species.
La... |
train/2419 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each aquarium",
"each aquarium . . . the surroundings"
] | 1 | 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/2420 | Which state is highlighted? | [
"Louisiana",
"Texas",
"Mississippi",
"Alabama"
] | 0 | closed choice | grade5 | social science | geography | States | Identify states of the Southeast | This state is Louisiana. | ||
train/2421 | Which specific humidity level was measured within the outlined area shown? | [
"12 grams of water vapor per kilogram of air",
"11 grams of water vapor per kilogram of air",
"4 grams of water vapor per kilogram of air"
] | 2 | The map below shows humidity in the lower atmosphere on September 12, 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 Australia on that day.
Look at the map. Then, answer the question below.
Data source: United ... | 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 2 and 8 grams of water vapor per kilogram of air.
4 grams of water vapor per kilogram of... |
train/2422 | Identify the question that Kurt'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.
Kurt 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 | 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/2423 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | 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,... | 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/2424 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | 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,... | 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.
Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni... |
train/2425 | What is the capital of Delaware? | [
"Montpelier",
"Birmingham",
"Wilmington",
"Dover"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/2426 | Select the organism in the same species as the Eurasian beaver. | [
"Lontra canadensis",
"Castor fiber",
"Hystrix cristata"
] | 1 | This organism is a Eurasian beaver. Its scientific name is Castor fiber. | 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 Eurasian beaver's scientific name is Castor fiber.
Hystrix cristata does not have the same scientific name as a Eurasian beaver. So, Castor fiber and Hystrix cristata are not in the same species.
Castor fiber has the same scientific name as a Eurasian beaver. So, these organisms are in the same species.
Lontra canade... |
train/2427 | What is the name of the colony shown? | [
"South Carolina",
"Indiana",
"Rhode Island",
"Georgia"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Georgia. | ||
train/2428 | Which property matches this object? | [
"bendable",
"hard"
] | 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 hard object keeps its shape when you squeeze it. The rainbow sucker is hard.
A bendable object can be bent without breaking. The rainbow sucker is not bendable. |
train/2429 | What can Reba and Johnny trade to each get what they want? | [
"Reba can trade her tomatoes for Johnny's carrots.",
"Johnny can trade his broccoli for Reba's oranges.",
"Johnny can trade his almonds for Reba's tomatoes.",
"Reba can trade her tomatoes for Johnny'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.
Reba and Johnny open their lunch boxes in the school cafeteria. Neither Reba nor Johnny 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.
Reba wants broccoli. Johnny 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/2430 | Is the following statement about our solar system true or false?
The volume of Uranus is less than one-tenth of the volume of Saturn. | [
"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. | To determine if this statement is true, calculate the value of one-tenth the volume of Saturn.
Then compare the result to the volume of Uranus. The volume of Uranus is 68,300 billion km^3, which is less than 82,713 billion km^3. So, the volume of Uranus is less than one-tenth the volume of Saturn. |
train/2431 | Is wet paint a solid or a liquid? | [
"a solid",
"a liquid"
] | 1 | closed choice | grade2 | natural science | physics | States of matter | Classify matter as solid or liquid | Solid and liquid 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 is a li... | Wet paint is a liquid. A liquid takes the shape of any container it is in.
If you pour wet paint out of a can, the paint will change shape. But the wet paint will still take up the same amount of space. | |
train/2432 | What can Owen and William trade to each get what they want? | [
"Owen can trade his tomatoes for William's broccoli.",
"William can trade his broccoli for Owen's oranges.",
"Owen can trade his tomatoes for William's carrots.",
"William can trade his almonds for Owen's tomatoes."
] | 0 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Owen and William open their lunch boxes in the school cafeteria. Neither Owen nor William got everything that they wanted. The ta... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Owen wants broccoli. William 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/2433 | In this food chain, the mudminnow is a consumer. Why? | [
"It makes its own food.",
"It eats another living thing."
] | 1 | This diagram shows a food chain from Lake Superior, a freshwater ecosystem on the border of the United States and Canada. | closed choice | grade3 | natural science | biology | Ecosystems | Identify roles in food chains | Every living thing needs food to stay alive. Living things get their food in different ways. A food chain shows how living things in an ecosystem get their food.
Producers make their own food. Many producers use carbon dioxide, water, and sunlight to make sugar. This sugar is food for the producer.
Consumers eat other ... | In this food chain, the mudminnow is a consumer because it eats another living thing. The mudminnow in this food chain eats the amphipod. |
train/2434 | Which of these states is farthest north? | [
"Maryland",
"North Carolina",
"New Mexico",
"Florida"
] | 0 | 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. Maryland is farthest north. | |
train/2435 | Which term matches the picture? | [
"endotherms",
"ectotherms"
] | 0 | Read the text.
Most animals need to maintain a body temperature within a narrow range. Endotherms, such as humans and other mammals, can regulate their temperatures internally. When the temperature of their surrounding environments changes, endotherms may shiver or sweat to keep their body temperatures within a normal ... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | Endotherms regulate their temperature internally. Horses and other mammals are endotherms. On a hot day, horses can sweat to regulate their body temperature. | |
train/2436 | What is the capital of Idaho? | [
"Birmingham",
"Kansas City",
"Boise",
"Nampa"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Boise is the capital of Idaho. | ||
train/2437 | Which property do these three objects have in common? | [
"flexible",
"translucent",
"rough"
] | 1 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A translucent object lets light through. But you cannot see clearly through a translucent object. All three objects are translucent.
A rough object feels scratchy when you touch it. None of the objects are rough.
A flexible object can be folded or be... |
train/2438 | What is the name of the colony shown? | [
"Vermont",
"New York",
"Iowa",
"New Jersey"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New York.
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/2439 | Which of these states is farthest south? | [
"Missouri",
"Georgia",
"California",
"North Dakota"
] | 1 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. Georgia is farthest south. | |
train/2440 | Which of these continents does the equator intersect? | [
"Australia",
"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 Australia or North America. | |
train/2441 | What is the name of the colony shown? | [
"Maryland",
"Georgia",
"New Jersey",
"North Carolina"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Georgia. | ||
train/2442 | Which of the following organisms is the primary consumer in this food web? | [
"bolete fungus",
"silver maple",
"swallowtail caterpillar",
"black racer"
] | 2 | Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade7 | natural science | biology | Ecological interactions | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Primary consumers eat producers. So, in a food web, primary consumers have arrows pointing to them from producers.
The bolete fungus has arrows pointing to it from the black racer, the gray fox, and the bobcat. None of these organisms is a producer, so the bolete fungus is not a primary consumer.
The black racer has an... |
train/2443 | What is the capital of New Mexico? | [
"Memphis",
"Albuquerque",
"Santa Fe",
"Olympia"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Santa Fe is the capital of New Mexico. | ||
train/2444 | What is the African bush elephant's scientific name? | [
"Loxodonta cyclotis",
"Loxodonta africana"
] | 1 | Both the African bush elephant and the African forest elephant live in Africa. But only the African bush elephant's scientific name refers to Africa! | closed choice | grade4 | natural science | biology | Scientific names | Origins of scientific names | When a scientist identifies a new organism, he or she chooses its scientific name.
Sometimes, an organism is named after the place where it was first found. Other times, an organism is named after the scientist who first identified it. Or, the scientific name might describe the organism's physical traits.
Many of the w... | This organism's scientific name refers to Africa.
The word africana refers to Africa. So, the African bush elephant's scientific name is Loxodonta africana. |
train/2445 | Which property matches this object? | [
"rough",
"colorful"
] | 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 rough object feels scratchy when you touch it. The log is rough.
A colorful object has one or more bright colors. The log is not colorful. |
train/2446 | 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"
] | 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 B has more mass than each particle in sample A. The particles in sample B also have a higher average speed than the particles 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 ... |
train/2447 | Which of the following organisms is the secondary consumer in this food web? | [
"green algae",
"shiner",
"golden algae"
] | 1 | Below is a food web from Little Rock Lake, a freshwater lake ecosystem in Wisconsin.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade5 | natural science | biology | Ecosystems | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Secondary consumers eat primary consumers, and primary consumers eat producers. So, in a food web, secondary consumers have arrows pointing to them from primary consumers. Primary consumers have arrows pointing to them from producers.
The green algae does not have any arrows pointing to it, so it is not a secondary con... |
train/2448 | What is the capital of West Virginia? | [
"Biloxi",
"Little Rock",
"Charleston",
"Huntington"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Charleston is the capital of West Virginia. | ||
train/2449 | Which statement is supported by these pictures? | [
"The sponge brittle star has red skin, and so did Paleocoma.",
"The sponge brittle star has five arms, and so did Paleocoma."
] | 1 | Look at the two pictures below. The sponge brittle star is a modern organism, and Paleocoma is an extinct one. The sponge brittle star has many of the traits that Paleocoma had. | closed choice | grade4 | natural science | earth-science | Fossils | Compare ancient and modern organisms: use observations to support a hypothesis | Fossils are the remains of organisms that lived long ago. Scientists look at fossils to learn about the traits of ancient organisms. Often, scientists compare fossils to modern organisms.
Some ancient organisms had many traits in common with modern organisms. Other ancient organisms were very different from any organis... | The sponge brittle star has five arms and red skin.
This fossil shows the remains of five arms. So, Paleocoma had five arms.
The fossil does not preserve the color of the animal's skin. So, you cannot tell from the fossil whether Paleocoma had red skin.
Choice "The sponge brittle star has red skin, and so did Paleocoma... |
train/2450 | Which animal is also adapted for flight? | [
"great blue heron",
"European mole"
] | 0 | Flying foxes live in the forests of Southeast Asia and Australia. The has wings. It is adapted for flight.
Figure: flying fox. | 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.
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 flying fox.
The flying fox has large, powerful wings. It is adapted for flight. Long, powerful wings help the flying fox travel long distances by air.
Now look at each animal. Figure out which animal has a similar adaptation.
The great blue heron has large, powerful wings. It is adapted for f... |
train/2451 | Select the organism in the same genus as the southern crowned pigeon. | [
"Larus michahellis",
"Strix nebulosa",
"Goura cristata"
] | 2 | This organism is a southern crowned pigeon. Its scientific name is Goura scheepmakeri. | 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 southern crowned pigeon's scientific name is Goura scheepmakeri. The first word of its scientific name is Goura.
Larus michahellis is in the genus Larus. The first word of its scientific name is Larus. So, Larus michahellis and Goura scheepmakeri are not in the same genus.
Goura cristata is in the genus Goura. The fi... |
train/2452 | 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 1.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 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 | 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,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/2453 | What is the probability that a Labrador retriever produced by this cross will be homozygous dominant for the fur color gene? | [
"1/4",
"0/4",
"4/4",
"2/4",
"3/4"
] | 1 | In a group of Labrador retrievers, some individuals have black fur and others have brown fur. In this group, the gene for the fur color trait has two alleles. The allele for brown fur (f) is recessive to the allele for black fur (F).
This Punnett square shows a cross between two Labrador retrievers. | 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/2454 | Which type of force from the driver's foot presses the gas pedal down? | [
"push",
"pull"
] | 0 | A driver presses the gas pedal with her foot. Her foot applies a force to the pedal, and the pedal moves down. | closed choice | grade3 | natural science | physics | Force and motion | Identify pushes and pulls | A force is a push or a pull that one object applies to a second object.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The driver's foot applies a force to the gas pedal. This force presses the pedal down. The direction of this force is away from the driver's foot. This force is a push. |
train/2455 | Which of these states is farthest south? | [
"Oklahoma",
"New York",
"Ohio",
"Maine"
] | 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. Oklahoma is farthest south. | |
train/2456 | What is the capital of Vermont? | [
"Montpelier",
"Concord",
"Louisville",
"Burlington"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Montpelier is the capital of Vermont. | ||
train/2457 | Which is the main persuasive appeal used in this ad? | [
"pathos (emotion)",
"logos (reason)",
"ethos (character)"
] | 0 | 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 pathos, or emotion. It links the product to feelings of belonging and family love. | |
train/2458 | 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 1.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 2."
] | 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 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/2459 | Select the organism in the same species as the barred owl. | [
"Strix varia",
"Ardea alba",
"Tigrisoma mexicanum"
] | 0 | This organism is a barred owl. Its scientific name is Strix varia. | 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 barred owl's scientific name is Strix varia.
Strix varia has the same scientific name as a barred owl. So, these organisms are in the same species.
Ardea alba does not have the same scientific name as a barred owl. So, Strix varia and Ardea alba are not in the same species.
Tigrisoma mexicanum does not have the same ... |
train/2460 | Which part of the orange tree do we usually eat? | [
"the fruit",
"the stem",
"the leaves"
] | 0 | People use orange trees for food. We usually eat the part of this plant that contains the seeds. It grows from a pollinated flower. | closed choice | grade4 | natural science | biology | Plants | Classify fruits and vegetables as plant parts | The fruits and vegetables we eat are parts of plants! Plants are made up of different structures. The different structures carry out important functions.
The roots take in water and nutrients from the soil. They also hold the plant in place in the soil.
The stem supports the plant. It carries food, water, and nutrients... | The part of the orange tree we usually eat is the fruit. It contains the seeds. |
train/2461 | Is the following statement about our solar system true or false?
Neptune's volume is more than 100 times as large as Earth's. | [
"true",
"false"
] | 1 | 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 100 times the volume of Earth.
Then compare the result to the volume of Neptune. The volume of Neptune is 6.25 x 10^13 km^3, which is less than 1.08 x 10^14 km^3. So, Neptune's volume is less than 100 times as large as Earth's. |
train/2462 | Is a tissue a solid, a liquid, or a gas? | [
"a solid",
"a liquid",
"a gas"
] | 0 | 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... | A tissue is a solid that can be folded or torn. But if you fold a tissue, it will still have a size and shape of its own. If you tear a tissue into pieces, each piece will still have a size and shape of its own. | |
train/2463 | What is this pachycephalosaur's scientific name? | [
"Dracorex spinifer",
"Dracorex hogwartsia"
] | 1 | This pachycephalosaur's fossil was discovered in South Dakota. The scientists who named this dinosaur thought it looked like a fairy-tale dragon! This pachycephalosaur's scientific name refers to the Hogwarts School of Witchcraft and Wizardry from J. K. Rowling's Harry Potter book series. | closed choice | grade4 | natural science | biology | Scientific names | Origins of scientific names | When a scientist identifies a new organism, he or she chooses its scientific name.
Sometimes, an organism is named after the place where it was first found. Other times, an organism is named after the scientist who first identified it. Or, the scientific name might describe the organism's physical traits.
Many of the w... | This organism's scientific name refers to Hogwarts.
The word hogwartsia refers to Hogwarts. So, this pachycephalosaur's scientific name is Dracorex hogwartsia. |
train/2464 | Which of these continents does the prime meridian intersect? | [
"Australia",
"Africa",
"North 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 Africa. It does not intersect North America or Australia. | |
train/2465 | Identify the question that Deion's experiment can best answer. | [
"Does apple juice expand more or less than water when it freezes?",
"Does water freeze more quickly than apple juice?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Deion poured 30 milliliters of water into each of six measuring cups. He poured the same volume of apple juice into another six measuring cups. He kept the measuring cups in a freezer for 48 hours. Deion then observed t... | 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/2466 | Which of these states is farthest east? | [
"Vermont",
"Florida",
"California",
"Indiana"
] | 0 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Vermont is farthest east. | |
train/2467 | Which continent is highlighted? | [
"Europe",
"North America",
"Australia",
"South America"
] | 1 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is North America. | |
train/2468 | What is the capital of Michigan? | [
"Lansing",
"Lincoln",
"Columbia",
"Grand Rapids"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Lansing is the capital of Michigan. | ||
train/2469 | Which of the following organisms is the primary consumer in this food web? | [
"bacteria",
"rotifer",
"black crappie"
] | 1 | Below is a food web from Little Rock Lake, a freshwater lake ecosystem in Wisconsin.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade5 | natural science | biology | Ecosystems | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Primary consumers eat producers. So, in a food web, primary consumers have arrows pointing to them from producers.
The rotifer has an arrow pointing to it from the green algae. The green algae is a producer, so the rotifer is a primary consumer.
The bacteria have arrows pointing to them from the copepod and the shiner.... |
train/2470 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each vial",
"each vial . . . the surroundings"
] | 0 | Scientists in a laboratory were working with insulin, a protein often used to treat diabetes. They left two identical vials of insulin in different places. This table shows how the temperature of each vial changed over 15minutes. | 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 vial increased, which means that the thermal energy of each vial increased. So, thermal energy was transferred from the surroundings to each vial. |
train/2471 | Which country is highlighted? | [
"Antigua and Barbuda",
"Dominica",
"Saint Lucia",
"Barbados"
] | 2 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Lucia. | ||
train/2472 | Which country is highlighted? | [
"Kiribati",
"Nauru",
"Papua New Guinea",
"Vanuatu"
] | 1 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Nauru. | ||
train/2473 | What is the capital of Maryland? | [
"Annapolis",
"Montpelier",
"Cambridge",
"Dover"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | ||
train/2474 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | 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 smaller distance between magnets, the magnitude of the magnetic force between them is greater.
There is a smaller distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2. |
train/2475 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/2476 | In this food chain, the algae is a producer. Why? | [
"It eats a consumer.",
"It eats another organism.",
"It makes its own food."
] | 2 | This diagram shows a food chain from Lake Superior, a freshwater ecosystem on the border of the United States and Canada. | 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 algae is a producer because it makes its own food. The algae uses carbon dioxide, water, and sunlight to make its own food. |
train/2477 | What type of rock is gabbro? | [
"sedimentary",
"igneous",
"metamorphic"
] | 1 | This is a piece of gabbro. It formed through the cooling of melted rock below the earth's surface, called magma.
As the magma cooled, mineral grains began to form. Gabbro is made of minerals such as olivine and feldspar. The mineral grains in gabbro are large. This is because the magma cooled slowly. | closed choice | grade7 | 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, or compacted, to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when ... | Gabbro is an igneous rock. Like other igneous rocks, it forms when melted rock cools and hardens.
Melted rock below the earth's surface is called magma. Gabbro forms from a type of magma that is rich in iron and magnesium. As the magma cools, minerals such as olivine and feldspar begin to form. When the magma becomes s... |
train/2478 | Which of these organisms contains matter that was once part of the bilberry? | [
"bear sedge",
"barren-ground caribou",
"mushroom"
] | 2 | Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade5 | natural science | biology | Ecosystems | Interpret food webs II | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows that starts from the bilberry.
No arrow points to the bear sedge. So, in this food web, matter does not move from the bilberry to the bear sedge.
The only arrow pointing to the barren-ground caribou sta... |
train/2479 | 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 greater in Pair 1.",
"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 sizes and shapes. | 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,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The larger the magnets, the greater the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is larger in Pair 1 than in Pair 2. So, the magnitud... |
train/2480 | Which continent is highlighted? | [
"Australia",
"Asia",
"South America",
"North America"
] | 3 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is North America. | |
train/2481 | Which property do these two objects have in common? | [
"scratchy",
"colorful"
] | 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 scratchy object is rough and itchy against your skin. Neither of the objects are scratchy.
A colorful object has one or more bright colors. Both objects are colorful.
The property that both objects have in common is colorful. |
train/2482 | 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"
] | 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/2483 | 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/2484 | Which of the following could Scott's test show? | [
"how steady a parachute with a 1 m vent was at 200 km per hour",
"whether a parachute with a 1 m vent would swing too much at 400 km per hour",
"if the spacecraft was damaged when using a parachute with a 1 m vent going 200 km per hour"
] | 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 | 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/2485 | What is the expected ratio of offspring with a gray body to offspring with a golden body? Choose the most likely ratio. | [
"1:3",
"3:1",
"0:4",
"4:0",
"2:2"
] | 3 | In a group of guppies, some individuals have a gray body and others have a golden body. In this group, the gene for the body color trait has two alleles. The allele for a golden body (b) is recessive to the allele for a gray body (B).
This Punnett square shows a cross between two guppies. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring with a gray body or a golden body, consider whether each phenotype is the dominant or recessive allele's version of the body color trait. The question tells you that the b allele, which is for a golden body, is recessive to the B allele, which is for... |
train/2486 | Which continent is highlighted? | [
"South America",
"Asia",
"North America",
"Australia"
] | 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 North America. | |
train/2487 | Which of these states is farthest east? | [
"South Dakota",
"Arkansas",
"Kansas",
"Oregon"
] | 1 | 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 east arrow is pointing. Arkansas is farthest east. | |
train/2488 | 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 smaller in Pair 1.",
"The magnitude of the magnetic force is smaller in Pair 2."
] | 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 | 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,... | 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/2489 | Which ocean is highlighted? | [
"the Southern Ocean",
"the Indian Ocean",
"the Pacific Ocean",
"the Arctic Ocean"
] | 1 | closed choice | grade8 | 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/2490 | What is the capital of Minnesota? | [
"Minneapolis",
"Des Moines",
"Saint Paul",
"Indianapolis"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | ||
train/2491 | What is the capital of Utah? | [
"Salem",
"Juneau",
"Provo",
"Salt Lake City"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Salt Lake City is the capital of Utah. | ||
train/2492 | Complete the statement.
Cyclooctasulfur is (). | [
"a compound",
"an elementary substance"
] | 1 | The model below represents a molecule of cyclooctasulfur. Cyclooctasulfur is used in the production of rubber bands and automobile tires. | closed choice | grade7 | natural science | chemistry | Atoms and molecules | Classify 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 ... | Use the model to determine whether cyclooctasulfur is an elementary substance or a compound.
Step 1: Interpret the model.
In the ball-and-stick model shown above, all of the balls are the same color:
. The legend shows that yellow represents the chemical element with the atomic symbol S. S is the atomic symbol for the ... |
train/2493 | Which animal's skin is also adapted for survival in cold places? | [
"caribou",
"fantastic leaf-tailed gecko"
] | 0 | Polar bears live in and around the cold Arctic Ocean. The 's skin is adapted to help the animal survive in cold places.
Figure: polar bear. | 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 polar bear.
The polar bear has skin with thick fur on top and a thick layer of fat underneath it. Its skin is adapted for survival in cold places. The polar bear uses its fur and fat to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
Durin... |
train/2494 | What type of rock is andesite? | [
"igneous",
"metamorphic"
] | 0 | Andesite is a type of rock. It is commonly found near volcanoes along the coast of the Pacific Ocean. When melted rock cools at the earth's surface, it can form andesite. | 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... | Andesite is an igneous rock. Like other igneous rocks, it forms when melted rock cools and hardens.
Melted rock is a hot, thick liquid. As melted rock cools, solid mineral grains begin to form. When the melted rock becomes solid, it forms igneous rock. The word igneous comes from the Latin word ignis, which means fire. |
train/2495 | Is the following statement about our solar system true or false?
Of the four largest planets, three are made mainly of gas. | [
"true",
"false"
] | 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 the four largest planets are Jupiter, Saturn, Uranus, and Neptune. Jupiter and Saturn are made mainly of gas. Uranus and Neptune are made mainly of ice. So, of the four largest planets, two are made mainly of gas. |
train/2496 | Which of these organisms contains matter that was once part of the persimmon tree? | [
"black bear",
"beaver"
] | 0 | Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade8 | natural science | biology | Ecological interactions | Interpret food webs II | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows that starts from the persimmon tree.There are two paths matter can take from the persimmon tree to the black racer: persimmon tree->pine vole->black racer. persimmon tree->swallowtail caterpillar->pine ... |
train/2497 | Which air temperature was measured within the outlined area shown? | [
"7°C",
"4°C",
"27°C"
] | 2 | The map below shows air temperatures in the lower atmosphere on September 12, 2013. The outlined area shows an air mass that influenced weather in Australia on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Lab... | 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.
The legend tells you that this air mass contained air with temperatures between 25°C and 35°C.
27°C is within this range.
4°C and 7°C are outside of this range. |
train/2498 | Which of the following could Marvin's test show? | [
"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",
"how much athletes would sweat in the fabric"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade8 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/2499 | Which month is the wettest on average in Cairo? | [
"March",
"January",
"September"
] | 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 Cairo, look at the graph.
Choice "Jan" is incorrect.
Choice "Mar" is incorrect.
Choice "Sep" is incorrect.
January has an average monthly precipitation of about 15 millimeters. This is higher than in any other month. So, January is the wettest month on average. |
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