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train/5400 | Which solution has a higher concentration of blue particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each blue ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/5401 | Which country is highlighted? | [
"Grenada",
"Antigua and Barbuda",
"Saint Kitts and Nevis",
"Saint Lucia"
] | 2 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Kitts and Nevis. | ||
train/5402 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 1 | Figure: Kuwait.
Kuwait is a country in the Middle East. High pressure systems and blue skies are common year-round in Kuwait.
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.
Kuwait is a country in the Middle East. High pressure systems and blue skies are common year-round in Kuwait.
The underlined part of the passage tells you about the usual pattern of barometric pressure in Kuwait. This passage does not describe what the weather is like on a particular day. So... |
train/5403 | Is scoria a mineral? | [
"no",
"yes"
] | 0 | Scoria has the following properties:
solid
found in nature
no fixed crystal structure
not made by living things
not a pure substance | 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... | Scoria does not have all the properties of a mineral. So, scoria is not a mineral. |
train/5404 | What is the name of the colony shown? | [
"Ohio",
"New York",
"New Jersey",
"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/5405 | Which part of the banana tree do we usually eat? | [
"the fruit",
"the flowers",
"the leaves"
] | 0 | People use banana 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 banana tree we usually eat is the fruit. It contains the seeds. |
train/5406 | Which solution has a higher concentration of yellow particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... |
train/5407 | Which state is highlighted? | [
"Florida",
"Mississippi",
"Texas",
"North Carolina"
] | 2 | closed choice | grade5 | social science | geography | States | Identify states of the Southeast | This state is Texas. | ||
train/5408 | Which of the following organisms is the secondary consumer in this food web? | [
"orca",
"sea otter",
"sea urchin",
"phytoplankton"
] | 1 | Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California.
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 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 phytoplankton does not have any arrows pointing to it. So, the phytoplankton is n... |
train/5409 | Which is the main persuasive appeal used in this ad? | [
"ethos (character)",
"pathos (emotion)",
"logos (reason)"
] | 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 pathos, or emotion. It links the product to memories of happy times with family. | |
train/5410 | What is the Hercules beetle's scientific name? | [
"Dynastes hercules",
"Dynastes hyllus"
] | 0 | Hercules beetles can lift up to 850 times their own weight! They are named after the mythological character Hercules, who was known for his strength. The Hercules beetle's scientific name also refers to Hercules. | 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 Hercules.
The word hercules refers to Hercules. So, the Hercules beetle's scientific name is Dynastes hercules. |
train/5411 | What is the capital of Arizona? | [
"Phoenix",
"Sacramento",
"Olympia",
"Denver"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Phoenix is the capital of Arizona. | ||
train/5412 | Which material is this scarf made of? | [
"wool",
"asphalt"
] | 0 | closed choice | grade3 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the scarf.
The scarf is made of wool.
Wool comes from the fluffy coats of sheep! First, a farmer cuts the sheep's coats. Then, the wool is spun into yarn. The yarn can be dyed and used to make clothes. | |
train/5413 | Which part of an apple tree might grow into a new tree? | [
"a seed",
"a leaf"
] | 0 | This diagram shows the life cycle of an apple tree. | closed choice | grade8 | natural science | biology | Plant reproduction | Angiosperm and conifer life cycles | Flowering plants, called angiosperms, use their flowers for sexual reproduction.
Flowers can have male parts, female parts, or both! The male part is called the stamen, and the female part is called the pistil.
Both the male and female parts are needed for sexual reproduction. The female part produces eggs, and the mal... | A seed can grow into a new tree. When a seed lands on the ground, it can germinate and grow into a new plant.
An apple tree's leaves use photosynthesis to make food for the tree. The leaves do not grow into a new tree. |
train/5414 | Which of these states is farthest east? | [
"Texas",
"Washington",
"Nebraska",
"Florida"
] | 3 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Florida is farthest east. | |
train/5415 | Which property matches this object? | [
"yellow",
"translucent"
] | 0 | Select the better answer. | closed choice | grade3 | 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. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A translucent object lets light through. But you cannot see clearly through a translucent object. The chalk is not translucent.
Yellow is a color.
This color is yellow. The chalk is yellow. |
train/5416 | What can Manny and Antonio trade to each get what they want? | [
"Antonio can trade his broccoli for Manny's oranges.",
"Manny can trade his tomatoes for Antonio's broccoli.",
"Antonio can trade his almonds for Manny's tomatoes.",
"Manny can trade his tomatoes for Antonio's sandwich."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Manny and Antonio open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Manny wanted ... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Manny wanted broccoli in his lunch and Antonio was hoping for tomatoes. Look at the labeled part of the images.
Manny has tomatoes. Antonio 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/5417 | What is the capital of Michigan? | [
"Little Rock",
"Lansing",
"Grand Rapids",
"Springfield"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Lansing is the capital of Michigan. | ||
train/5418 | Select the fish below. | [
"Nile crocodile",
"painted stork",
"cane toad",
"seahorse"
] | 3 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A manta ray 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 seahorse is a fish. It lives underwater. It has fins, not limbs.
Seahorses live in shallow, warm water. They can use their tails to hold on to plants.
A painted stork is a bird. It has feathers, two wings, and a beak.
Storks wade in shallow water to look for food. Storks eat fish, insects, worms, and other small anim... |
train/5419 | What is the capital of Wyoming? | [
"Cheyenne",
"Carson City",
"Topeka",
"Laramie"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/5420 | Which material is this bridge made of? | [
"metal",
"plastic"
] | 0 | closed choice | grade3 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the bridge.
The bridge is made of two different materials. The surface is concrete. The rest of the bridge is made of metal.
Concrete and metal are good materials to build bridges with. Both materials are strong. They hold up well in cold or rainy weather. | |
train/5421 | Based on the event chain, which house does the first pig live in at the end? | [
"the straw house",
"the brick house"
] | 1 | This event chain shows the main events from the fairy tale The Three Little Pigs. | closed choice | grade5 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | An event chain uses arrows to show the order of events. This event chain shows the main events from the fairy tale The Three Little Pigs.
Follow the arrows to see the order of events. The last box says, The three pigs lived happily in the brick house. So at the end, the first pig lives in the brick house. |
train/5422 | Complete the statement.
Acetaldehyde is (). | [
"a compound",
"an elementary substance"
] | 0 | The model below represents a molecule of acetaldehyde. Acetaldehyde can be found in small amounts in ripe fruits and vegetables. | 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 acetaldehyde is an elementary substance or a compound.
Step 1: Interpret the model.
.
Use the legend to determine the chemical element represented by each color. The colors and atomic symbols from the legend are shown in the table below. The table also includes the names of the chemic... |
train/5423 | What can Ronald and Tammy trade to each get what they want? | [
"Tammy can trade her broccoli for Ronald's oranges.",
"Tammy can trade her almonds for Ronald's tomatoes.",
"Ronald can trade his tomatoes for Tammy's carrots.",
"Ronald can trade his tomatoes for Tammy'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.
Ronald and Tammy open their lunch boxes in the school cafeteria. Neither Ronald nor Tammy 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.
Ronald wants broccoli. Tammy 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/5424 | Which country is highlighted? | [
"Fiji",
"Solomon Islands",
"Nauru",
"Vanuatu"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Vanuatu.
Does Vanuatu have any territorial disputes?
Vanuatu claims to own Matthew and Hunter Islands, which are disputed islands. In other words, multiple countries or groups claim that the islands rightfully belong to them.
France has controlled the islands since 1929. But shortly after gaining indepe... | ||
train/5425 | What type of rock is basalt? | [
"sedimentary",
"igneous",
"metamorphic"
] | 1 | This is a piece of basalt. It formed through the cooling of melted rock at the earth's surface, called lava.
As the lava cooled, mineral grains began to form. Basalt is made of minerals such as olivine and feldspar. The mineral grains in basalt are small. This is because the lava cooled quickly. | 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 ... | Basalt is an igneous rock. Like other igneous rocks, it forms when melted rock cools and hardens.
Melted rock at the earth's surface is called lava. Basalt forms from a type of lava that is rich in iron and magnesium. As the lava cools, minerals such as olivine and feldspar begin to form. When the lava becomes solid, i... |
train/5426 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker in Pair 1.",
"The magnetic force is weaker in Pair 2."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other. | Distance affects the strength of the magnetic force. But the distance between the magnets in Pair 1 and in Pair 2 is the same.
So, the strength of the magnetic force is the same in both pairs. |
train/5427 | Which of these states is farthest west? | [
"Nevada",
"Kansas",
"Wyoming",
"Illinois"
] | 0 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Nevada is farthest west. | |
train/5428 | What is the capital of Minnesota? | [
"Jefferson City",
"Richmond",
"Columbus",
"Saint Paul"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | ||
train/5429 | Which of the following organisms is the primary consumer in this food web? | [
"kelp",
"sea otter",
"phytoplankton",
"zooplankton"
] | 3 | Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California.
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 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 sea otter has an arrow pointing to it from the sea urchin. The sea urchin is not a producer. So, the sea otter is not a primary consumer.
The sea urchin has an arrow pointing to it from the kelp. The k... |
train/5430 | Which of these states is farthest north? | [
"Florida",
"Arizona",
"Delaware",
"Iowa"
] | 3 | 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 north arrow is pointing. Iowa is farthest north. | |
train/5431 | Which animal is also adapted for flight? | [
"three-toed sloth",
"brahminy kite"
] | 1 | Great blue herons fly long distances each year to find food. They have wings instead of arms. Herons are adapted for flight.
Figure: great blue heron. | 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 great blue heron.
The great blue heron has large, powerful wings. It is adapted for flight. Long, powerful wings help the great blue heron travel long distances by air.
Now look at each animal. Figure out which animal has a similar adaptation.
The brahminy kite has long, powerful wings. It is... |
train/5432 | Which bird's beak is also adapted to catch fish? | [
"little egret",
"Asian golden weaver"
] | 0 | s live near wetlands, marshes, and lakes. They eat mostly fish. The shape of the 's beak is adapted to catch fish.
Figure: Amazon kingfisher. | 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 Amazon kingfisher.
The Amazon kingfisher has a long, straight beak with a sharp tip. Its beak is adapted to catch fish. The Amazon kingfisher can use its beak to grab the slippery body of a fish underwater. It can also catch a fish by stabbing it with its beak.
Now look at each bird. Figure o... |
train/5433 | Which continent is highlighted? | [
"Asia",
"South America",
"Europe",
"Australia"
] | 2 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Europe. | |
train/5434 | What is the capital of Virginia? | [
"Norfolk",
"Des Moines",
"Richmond",
"Charleston"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Richmond is the capital of Virginia. | ||
train/5435 | Which statement describes the Taklamakan Desert ecosystem? | [
"It has long, cold winters.",
"It has a medium amount of rain."
] | 0 | Figure: Taklamakan Desert.
The Taklamakan Desert is a cold desert ecosystem in northwestern China. Towns in this desert were stops along the Silk Road, a historical trade route between China and eastern Europe. | 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 cold desert is a type of ecosystem. Cold deserts have the following features: a small amount of rain or snow, dry, thin soil, and long, cold winters. So, the following statements describe the Taklamakan Desert ecosystem: a small amount of rain or snow, dry, thin soil, and long, cold winters. It has long, cold winters... |
train/5436 | Which country is highlighted? | [
"Tonga",
"New Zealand",
"Australia",
"Papua New Guinea"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is New Zealand. | ||
train/5437 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 2.",
"The magnetic force is stronger in Pair 1."
] | 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.
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/5438 | Which animal's limbs are also adapted for climbing trees? | [
"chimpanzee",
"red-necked wallaby"
] | 0 | s live in the rain forests of Indonesia and Malaysia. Their limbs are adapted for climbing trees.
Figure: Sumatran orangutan. | 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 Sumatran orangutan.
The Sumatran orangutan uses its long limbs to reach branches while climbing. It uses its fingers and toes to grab the branches.
Now look at each animal. Figure out which animal has a similar adaptation.
The chimpanzee has long, powerful limbs. Its limbs are adapted for cli... |
train/5439 | What is the capital of Texas? | [
"Austin",
"Des Moines",
"Raleigh",
"Baton Rouge"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | ||
train/5440 | Which statement is true about the average monthly precipitation in Charlotte? | [
"June is wetter than July.",
"Charlotte has a rainy season and a dry season.",
"Precipitation does not change much from month to month."
] | 2 | 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 Charlotte, look at the graph.
Choice "Jun" is incorrect.
Choice "Jul" is incorrect.
Choice "June is wetter than July." is incorrect.
Wetter months have a higher average precipitation than drier months. June and July have the same average monthly precipitation. So, June is... |
train/5441 | What is the name of the colony shown? | [
"South Carolina",
"North Carolina",
"Connecticut",
"Georgia"
] | 2 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Connecticut. | ||
train/5442 | What is the capital of California? | [
"Olympia",
"Sacramento",
"Salem",
"Helena"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Sacramento is the capital of California. | ||
train/5443 | In Cincinnati, which months have average temperatures above 70°F? | [
"June, July, and August",
"September, October, and November",
"March, April, and May"
] | 0 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Temperature is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average temperature for each month. The average temperature can be used to describe the climate of a location.
A line graph can be used t... | To describe the average temperature trends in Cincinnati, look at the graph.
Choice "Mar" is incorrect.
Choice "Apr" is incorrect.
Choice "May" 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.
... |
train/5444 | Which bird's beak is also adapted to crack large, hard nuts? | [
"spotted dove",
"hyacinth macaw"
] | 1 | s eat large seeds and nuts. The shape of the 's beak is adapted to crack open large, hard nuts.
Figure: Alexandrine parakeet. | 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 Alexandrine parakeet.
The Alexandrine parakeet has a thick hooked beak. Its beak is adapted to crack large, hard nuts. The Alexandrine parakeet uses its thick beak to crack the shell of a nut by squeezing it. The hooked shape of the beak can help the bird hold the nut in place while cracking ... |
train/5445 | In this food chain, the gray wolf is a consumer. Why? | [
"It eats another organism.",
"It makes its own food."
] | 0 | This diagram shows a food chain from a grassland ecosystem in Wyoming. | closed choice | grade4 | 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.
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 organisms. C... | In this food chain, the gray wolf is a consumer because it eats another organism. The gray wolf in this food chain eats the bison. |
train/5446 | Which better describes the Shenandoah National Park ecosystem? | [
"It has cold, wet winters. It also has soil that is rich in nutrients.",
"It has warm, dry summers. It also has many different types of trees."
] | 0 | Figure: Shenandoah National Park.
Shenandoah National Park is a temperate deciduous forest ecosystem in northern Virginia. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, Shenandoah National Park has cold, wet winters. It also has soil that is rich in nutrients. |
train/5447 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 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 | 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/5448 | Which country is highlighted? | [
"Grenada",
"Dominica",
"Trinidad and Tobago",
"Saint Vincent and the Grenadines"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Grenada. | ||
train/5449 | What is the probability that a pea plant produced by this cross will be homozygous dominant for the flower position gene? | [
"1/4",
"0/4",
"2/4",
"3/4",
"4/4"
] | 0 | This passage describes the flower position trait in pea plants:
Flowers can grow in different positions on a pea plant's stem. Axial flowers are in the middle of the plant's stem. Terminal flowers are at the tip of the stem.
In a group of pea plants, some individuals have axial flowers and others have terminal flowers.... | 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/5450 | What is the capital of Washington? | [
"Olympia",
"Juneau",
"Honolulu",
"Santa Fe"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Olympia is the capital of Washington. | ||
train/5451 | What is the name of the colony shown? | [
"New York",
"Iowa",
"Delaware",
"Tennessee"
] | 2 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/5452 | 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/5453 | Which of these cities is marked on the map? | [
"Minneapolis",
"Indianapolis",
"Detroit",
"Omaha"
] | 1 | closed choice | grade5 | social science | geography | Cities | Cities of the Midwest | The city is Indianapolis, Indiana. Minneapolis, Omaha, and Detroit are marked with gray circles on the map below. | ||
train/5454 | Which of these states is farthest south? | [
"Florida",
"Virginia",
"Massachusetts",
"North Dakota"
] | 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. Florida is farthest south. | |
train/5455 | Select the organism in the same genus as the European hare. | [
"Neofelis nebulosa",
"Lepus americanus",
"Erinaceus europaeus"
] | 1 | This organism is a European hare. Its scientific name is Lepus europaeus. | closed choice | grade7 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A European hare's scientific name is Lepus europaeus. The first word of its scientific name is Lepus.
Lepus americanus is in the genus Lepus. The first word of its scientific name is Lepus. So, Lepus americanus and Lepus europaeus are in the same genus.
Erinaceus europaeus and Lepus europaeus are not in the same genus.... |
train/5456 | During this time, thermal energy was transferred from () to (). | [
"each salmon . . . the surroundings",
"the surroundings . . . each salmon"
] | 1 | Turner lit the charcoal in his grill to cook two identical salmon. He put one fish on the left half of the grill and one fish on the right half of the grill. This table shows how the temperature of each salmon changed over 6minutes. | closed choice | grade8 | 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 salmon increased, which means that the thermal energy of each salmon increased. So, thermal energy was transferred from the surroundings to each salmon. |
train/5457 | What type of rock is gabbro? | [
"metamorphic",
"igneous"
] | 1 | Gabbro is a type of rock. It is usually dark-colored. When melted rock cools below the earth's surface, it can form gabbro. | 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... | Gabbro 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/5458 | What can Natalie and Mitch trade to each get what they want? | [
"Mitch can trade his almonds for Natalie's tomatoes.",
"Mitch can trade his broccoli for Natalie's oranges.",
"Natalie can trade her tomatoes for Mitch's broccoli.",
"Natalie can trade her tomatoes for Mitch's carrots."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Natalie and Mitch open their lunch boxes in the school cafeteria. Neither Natalie nor Mitch got everything that they wanted. The ... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Natalie wants broccoli. Mitch 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/5459 | Select the fish below. | [
"great white shark",
"kangaroo",
"tiger salamander",
"Amazon tree boa"
] | 0 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A salmon 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 kangaroo is a mammal. It has fur and feeds its young milk.
Kangaroos hop to move around. They use their large tails for balance while hopping.
An Amazon tree boa is a reptile. It has scaly, waterproof skin.
Tree boas eat small mammals, birds, lizards, and frogs. Tree boas only need to eat once every few months!
A gre... |
train/5460 | Which of these states is farthest east? | [
"Iowa",
"Utah",
"Oregon",
"Michigan"
] | 3 | 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. Michigan is farthest east. | |
train/5461 | 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,... | 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/5462 | Which country is highlighted? | [
"Samoa",
"Palau",
"the Federated States of Micronesia",
"New Zealand"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Palau. | ||
train/5463 | Select the mammal below. | [
"helmeted iguana",
"gorilla"
] | 1 | Mammals have hair or fur and feed their young milk. A kangaroo is an example of a mammal. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A gorilla is a mammal. It has fur and feeds its young milk.
A helmeted iguana is a reptile. It has scaly, waterproof skin. |
train/5464 | Which better describes the Great Basin Desert ecosystem? | [
"It has heavy snow. It also has soil that is frozen year-round.",
"It has dry, thin soil. It also has long, cold winters."
] | 1 | Figure: Great Basin Desert.
The Great Basin Desert is a cold desert ecosystem in the western United States. | 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 cold desert is a type of ecosystem. Cold deserts have the following features: a small amount of rain or snow, dry, thin soil, and long, cold winters. So, the Great Basin Desert has dry, thin soil. It also has long, cold winters. |
train/5465 | Which solution has a higher concentration of pink particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | 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/5466 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade3 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/5467 | 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."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | 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,... | 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/5468 | During this time, thermal energy was transferred from () to (). | [
"each battery . . . the surroundings",
"the surroundings . . . each battery"
] | 0 | Two friends bought phones that cost different amounts but had identical batteries. After using the phones for a while, both friends had to turn them off to let the batteries cool. This table shows how the temperature of each battery changed over 5minutes. | 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 battery decreased, which means that the thermal energy of each battery decreased. So, thermal energy was transferred from each battery to the surroundings. |
train/5469 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 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 | 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/5470 | Which animal's mouth is also adapted to tear through meat? | [
"nutria",
"spotted hyena"
] | 1 | Alligators are carnivores, or meat eaters. They eat fish, mammals, and other reptiles. The 's mouth is adapted to tear through meat.
Figure: alligator. | closed choice | grade4 | 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 alligator.
The alligator has a large mouth and sharp teeth. Its mouth is adapted to tear through meat. The alligator uses its large mouth to grab its prey. It uses its sharp teeth to cut up the meat of the prey into pieces it can swallow.
Now look at each animal. Figure out which animal has a... |
train/5471 | What is the name of the colony shown? | [
"Rhode Island",
"Massachusetts",
"Vermont",
"Connecticut"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Massachusetts.
The Massachusetts Colony included land that would later become the state of Maine. Maine was never its own colony. | ||
train/5472 | Which solution has a higher concentration of pink particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | 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 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/5473 | Which country is highlighted? | [
"Palau",
"New Zealand",
"Australia",
"Papua New Guinea"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is New Zealand. | ||
train/5474 | Which solution has a higher concentration of yellow particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 0 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... |
train/5475 | Is the following statement about our solar system true or false?
There are twice as many ice planets as rocky planets. | [
"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 there are two ice planets and four rocky planets. So, there are half as many ice planets as rocky planets. |
train/5476 | Which animal's skin is better adapted as a warning sign to ward off predators? | [
"strawberry poison frog",
"peppered moth"
] | 0 | Fire salamanders have poisonous glands in their brightly colored skin. The bright colors serve as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: fire salamander. | closed choice | grade4 | 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 fire salamander.
The fire salamander has a poisonous body with brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the fire salamander is poisonous.
Now look at each animal. Figure out which animal has a similar adaptation.
The stra... |
train/5477 | Which property do these four objects have in common? | [
"sweet",
"translucent",
"flexible"
] | 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.
Sugar has a sweet taste. The honey is sweet, but the wet ice cube and the ocean water are not.
A flexible object can be folded or bent without breaking easily. The wet ice cube is not flexible.
A translucent object lets light through. But you cannot ... |
train/5478 | Which term matches the picture? | [
"echinoderm",
"cnidarian"
] | 1 | Read the text.
The sea is home to many different groups, or phyla, of animals. Two of these are cnidarians and echinoderms.
Cnidarian comes from a Greek word that means "nettle," a stinging type of plant. Cnidarians have tentacles all around their mouths, which they use to sting prey and pull the prey toward their mout... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | A cnidarian is an animal with tentacles that can sting its prey or predators. A sea anemone is a type of cnidarian. | |
train/5479 | What is the capital of Vermont? | [
"Annapolis",
"Burlington",
"Newport",
"Montpelier"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Montpelier is the capital of Vermont. | ||
train/5480 | Which better describes the Tibetan Plateau ecosystem? | [
"It has long, cold winters. It also has many evergreen trees.",
"It has mostly small plants. It also has soil that is frozen year-round."
] | 1 | Figure: Tibetan Plateau.
The Tibetan Plateau is a tundra ecosystem located in Tibet, western China, and northern India. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A tundra is a type of ecosystem. Tundras have the following features: long, cold winters and short, cold summers, soil that is frozen year-round, and mostly small plants. So, the Tibetan Plateau has mostly small plants. It also has soil that is frozen year-round. |
train/5481 | Which of the following could Mike's test show? | [
"if the sample fabric would absorb one drop of water in less than one second",
"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"
] | 2 | 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/5482 | Which bird's beak is also adapted to crack hard seeds? | [
"large ground finch",
"Asian openbill"
] | 0 | Evening grosbeaks eat small, hard seeds. The shape of the 's beak is adapted to crack open small, hard seeds.
Figure: evening grosbeak. | closed choice | grade4 | 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 evening grosbeak.
The evening grosbeak has a short, thick beak. Its beak is adapted to crack hard seeds. The evening grosbeak uses its short, thick beak to press down on a seed and crack open its hard shell.
Now look at each bird. Figure out which bird has a similar adaptation.
The large grou... |
train/5483 | Which fish's mouth is also adapted for tearing through meat? | [
"copperband butterflyfish",
"starry moray"
] | 1 | Great white sharks eat turtles, dolphins, and other fish. The mouth of the is adapted to tear through meat.
Figure: great white shark. | 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 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 great white shark.
The great white shark has a large mouth and sharp teeth. Its mouth is adapted for tearing through meat. The great white shark uses its teeth to cut up meat into pieces it can swallow.
Now look at each animal. Figure out which animal has a similar adaptation.
The starry mora... |
train/5484 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"neither; the samples have the same temperature",
"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 | 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... | 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/5485 | Select the organism in the same genus as the great egret. | [
"Ardea purpurea",
"Caprimulgus macrurus",
"Tyto alba"
] | 0 | This organism is a great egret. Its scientific name is Ardea alba. | 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 great egret's scientific name is Ardea alba. The first word of its scientific name is Ardea.
Ardea purpurea is in the genus Ardea. The first word of its scientific name is Ardea. So, Ardea purpurea and Ardea alba are in the same genus.
Caprimulgus macrurus is in the genus Caprimulgus. The first word of its scientific... |
train/5486 | Which country is highlighted? | [
"Solomon Islands",
"Nauru",
"Tonga",
"the Marshall Islands"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is the Marshall Islands.
Does the Marshall Islands have any territorial disputes?
The Marshall Islands claims to own Wake Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
The United States claimed Wake Island in 1899 and has... | ||
train/5487 | Which of these statements about Jamestown is true? | [
"Jamestown was founded in the early 1600s.",
"Jamestown was the first English colony in North America.",
"Jamestown was founded in the late 1500s.",
"Jamestown was the only Spanish colony in South America."
] | 0 | This timeline shows when some European settlements were founded, or created. Look at the timeline. Then answer the question. | closed choice | grade4 | social science | us-history | English colonies in North America | Jamestown: the early years | Look at the timeline.
The timeline shows that Jamestown was founded in 1607. All of the years from 1600 to 1699 are in the 1600 s. The year 1607 is at the beginning of the 1600 s. So, Jamestown was founded in the early 1600 s. It was the first settlement in an area the English called the Virginia Colony.
Jamestown was ... | |
train/5488 | Which area voted for Lincoln? | [
"the Northwest",
"the South"
] | 0 | In the 1860 election, the Republican party nominated Abraham Lincoln for president. Meanwhile, the Democrats could not decide on one candidate. Look at the 1860 election map. Then answer the question below. | closed choice | grade4 | social science | us-history | The Civil War and Reconstruction | The Civil War: the beginning of the war | ||
train/5489 | What is the capital of Alaska? | [
"Juneau",
"Salem",
"Baton Rouge",
"Honolulu"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/5490 | In this experiment, which were part of a control group? | [
"the pennies with soapy water",
"the pennies with pure water"
] | 1 | The passage below describes an experiment.
Danny noticed that he could make a dome of water on a penny if he added drops of water slowly enough. He wondered if adding soap to the water would allow him to fit more or less water on the penny.
Danny put equal-sized drops of pure water, one at a time, onto a penny. He rec... | 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, Danny investigated whether adding soap to water affects how much water can fit on a penny. The pennies with pure water did not get soapy water. So, they were part of a control group. |
train/5491 | Based on the table, which are metamorphic rocks? | [
"marble and slate",
"marble and shale"
] | 0 | This table compares different types of rock. | closed choice | grade6 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | In a table, each cell gives information related to its row and column. This table compares different types of rock.
Look in the Type of rock column and find metamorphic. Follow the row to the farthest right column to see examples of this kind of rock. The Examples column tells you that marble and slate are metamorphic ... |
train/5492 | Which property matches this object? | [
"stretchy",
"breakable"
] | 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 stretchy object gets longer when you pull on it. The ceramic tea cup is not stretchy.
A breakable object will break into pieces if you drop it. The ceramic tea cup is breakable. |
train/5493 | Select the organism in the same genus as the red-eyed tree frog. | [
"Agalychnis callidryas",
"Hyla cinerea",
"Bufo bufo"
] | 0 | This organism is a red-eyed tree frog. Its scientific name is Agalychnis callidryas. | 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 red-eyed tree frog's scientific name is Agalychnis callidryas. The first word of its scientific name is Agalychnis.
Hyla cinerea is in the genus Hyla. The first word of its scientific name is Hyla. So, Hyla cinerea and Agalychnis callidryas are not in the same genus.
Bufo bufo is in the genus Bufo. The first word of ... |
train/5494 | 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/5495 | What can Andrew and Roy trade to each get what they want? | [
"Andrew can trade his tomatoes for Roy's sandwich.",
"Andrew can trade his tomatoes for Roy's broccoli.",
"Roy can trade his almonds for Andrew's tomatoes.",
"Roy can trade his broccoli for Andrew's oranges."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Andrew and Roy open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Andrew wanted br... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Andrew wanted broccoli in his lunch and Roy was hoping for tomatoes. Look at the labeled part of the images.
Andrew has tomatoes. Roy 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/5496 | Which country is highlighted? | [
"Fiji",
"Solomon Islands",
"Tuvalu",
"Tonga"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tonga. | ||
train/5497 | 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 north pole of one magnet is closest to the south pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/5498 | 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 | grade3 | 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 north pole of one magnet is closest to the south pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/5499 | Select the organism in the same species as the Goliath heron. | [
"Ardea goliath",
"Tigrisoma mexicanum",
"Falco peregrinus"
] | 0 | This organism is a Goliath heron. Its scientific name is Ardea goliath. | 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 Goliath heron's scientific name is Ardea goliath.
Ardea goliath has the same scientific name as a Goliath heron. So, these organisms are in the same species.
Falco peregrinus does not have the same scientific name as a Goliath heron. So, Ardea goliath and Falco peregrinus are not in the same species.
Tigrisoma mexica... |
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