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train/4000 | What is the capital of Georgia? | [
"Charleston",
"Topeka",
"Atlanta",
"Montgomery"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Atlanta is the capital of Georgia. | ||
train/4001 | What is the capital of West Virginia? | [
"Oklahoma City",
"Springfield",
"Charleston",
"Huntington"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Charleston is the capital of West Virginia. | ||
train/4002 | An international organization is made up of members from () who (). | [
"different countries . . . declare war on other countries",
"different countries . . . work together for a shared purpose",
"the same country . . . work together for a shared purpose",
"the same country . . . declare war on other countries"
] | 1 | Look at the phrase "international organization." Then complete the text below.
Use the information above to complete the sentence. | closed choice | grade6 | social science | global-studies | Government | International organizations | The word international describes something involving more than one country. An organization is a group with a purpose. So, an international organization is made up of members from different countries who work together to achieve a shared purpose. | |
train/4003 | In this experiment, which were part of an experimental group? | [
"the salted ice cubes",
"the unsalted ice cubes"
] | 0 | The passage below describes an experiment.
After a severe winter storm, Chase's driveway was covered with ice. He read that salt makes ice melt at a lower temperature. Before covering his entire driveway with salt, he wanted to know if adding salt could actually help melt ice in the freezing outdoor temperatures.
Chas... | 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, Chase investigated whether adding salt to ice cubes affects how quickly they melt. So, the salted ice cubes were part of an experimental group.
The unsalted ice cubes did not get salt. So, they were not part of an experimental group. |
train/4004 | Select the mammal below. | [
"piranha",
"gorilla"
] | 1 | Mammals have hair or fur and feed their young milk. A gray wolf is an example of a mammal. | closed choice | grade3 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A gorilla is a mammal. It has fur and feeds its young milk.
Gorillas live in groups called troops. The largest male in the troop is usually the leader.
A piranha is a fish. It lives underwater. It has fins, not limbs.
Piranhas have sharp teeth. Piranhas hunt in groups. A group of piranhas can eat a large animal. |
train/4005 | What is the capital of Virginia? | [
"Richmond",
"Baton Rouge",
"Buffalo",
"Norfolk"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Richmond is the capital of Virginia. | ||
train/4006 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/4007 | Which of these oceans does the prime meridian intersect? | [
"the Atlantic Ocean",
"the Indian Ocean",
"the Pacific Ocean"
] | 0 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects the Atlantic Ocean. It does not intersect the Pacific Ocean or the Indian Ocean. | |
train/4008 | Which ocean is highlighted? | [
"the Arctic Ocean",
"the Southern Ocean",
"the Indian Ocean",
"the Pacific Ocean"
] | 1 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Southern Ocean.
The Southern Ocean reaches from the shores of Antarctica to 60° South latitude. | |
train/4009 | What can Marshall and Nina trade to each get what they want? | [
"Marshall can trade his tomatoes for Nina's broccoli.",
"Nina can trade her almonds for Marshall's tomatoes.",
"Marshall can trade his tomatoes for Nina's carrots.",
"Nina can trade her broccoli for Marshall's oranges."
] | 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.
Marshall and Nina open their lunch boxes in the school cafeteria. Neither Marshall nor Nina got everything that they wanted. The ... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Marshall wants broccoli. Nina 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/4010 | What is the capital of Minnesota? | [
"Frankfort",
"Jefferson City",
"Minneapolis",
"Saint Paul"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | ||
train/4011 | Is a tent a solid or a liquid? | [
"a liquid",
"a solid"
] | 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... | A tent is a solid. You can fold a tent or spread it out. But it will still have a size and shape of its own. | |
train/4012 | Which property matches this object? | [
"yellow",
"rough"
] | 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 rain boots are not rough.
Yellow is a color.
This color is yellow. The rain boots are yellow. |
train/4013 | What is the capital of Maine? | [
"Boston",
"Augusta",
"Indianapolis",
"Topeka"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Augusta is the capital of Maine. | ||
train/4014 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 0 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/4015 | Is the following statement about our solar system true or false?
Jupiter's volume is more than 1,000 times as great as Earth's volume. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade7 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | To determine if this statement is true, calculate the value of 1,000 times the volume of Earth.
Then compare the result to the volume of Jupiter. Jupiter's volume is 1,431,280 billion km^3, which is more than 1,090,000 billion km^3. So, Jupiter's volume is more than 1,000 times as great as Earth's volume. |
train/4016 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 2.",
"The magnetic force is stronger in Pair 1.",
"The strength of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 2 are closer together than the magnets in Pair 1. So, the magnetic force is stronger in Pair 2 than in Pair 1. |
train/4017 | Is the following statement about our solar system true or false?
50% of the planets 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 two out of the eight planets are made mainly of gas. So, one-fourth, or 25%, of the planets are made mainly of gas. |
train/4018 | What evidence of a volcanic eruption does this picture show? | [
"Part of the sky is clear.",
"A red liquid is coming out of the ground."
] | 1 | This picture was taken during a volcanic eruption. A volcanic eruption happens when melted rock comes out from under the ground. | closed choice | grade2 | natural science | earth-science | Earth events | Find evidence of changes to Earth's surface | Evidence is information that tells you something happened.
How do you look for evidence of a change to Earth's surface?
There are many ways to find evidence of a change to Earth's surface. One way is to look at a picture that was taken after the change.
Here are some examples of what the evidence for different changes ... | |
train/4019 | Which property do these four objects have in common? | [
"salty",
"translucent",
"fuzzy"
] | 0 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
Potato chips have a salty taste. All four objects are salty.
A fuzzy object is covered in soft hair. The cracker is not fuzzy.
A translucent object lets light through. But you cannot see clearly through a translucent object. The ocean water is transl... |
train/4020 | Which country is highlighted? | [
"New Zealand",
"Fiji",
"Tuvalu",
"Tonga"
] | 2 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tuvalu. | ||
train/4021 | What is the capital of Alaska? | [
"Juneau",
"Concord",
"Honolulu",
"Jackson"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/4022 | In this food chain, the mayfly is a primary consumer. Why? | [
"It eats a tertiary consumer.",
"It eats a producer.",
"It makes its own food."
] | 1 | 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 mayfly is a primary consumer because it eats a producer. The producer in this food chain is the algae. |
train/4023 | Select the true statement. | [
"Molecules from food can provide energy.",
"Animals need food, but plants don't."
] | 0 | Plants, animals, and all other organisms need energy from food to live and grow.
How do organisms get energy from food? Inside an organism's cells, food molecules are broken down and rearranged through chemical reactions. The reactions release chemical energy that the cells can use to power growth and other important ... | closed choice | grade6 | natural science | biology | Photosynthesis | How do plants use and change energy? | Molecules from food can provide energy.
Animals need food, but plants don't.
All organisms need energy from food. Some organisms, including most plants, make their own food.
Chemical energy can be used for cell growth.
Cells can use chemical energy to power many important cell processes, including growth. | |
train/4024 | Which better describes the Great Basin Desert ecosystem? | [
"It has heavy snow. It also has soil that is frozen year-round.",
"It has long, cold winters. It also has a small amount of rain or snow."
] | 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 long, cold winters. It also has a small amount of rain or snow. |
train/4025 | Which animal is also adapted to be camouflaged in a sandy desert? | [
"merveille-du-jour moth",
"fennec fox"
] | 1 | Flat-tail horned lizards live in the deserts of North America. The is adapted to be camouflaged in a sandy desert.
Figure: flat-tail horned lizard. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the flat-tail horned lizard.
The flat-tail horned lizard has sand-colored scales covering its body. It is adapted to be camouflaged in a sandy desert. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The fennec fox has sand-colored ... |
train/4026 | Is coffee 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... | Coffee is a liquid. A liquid takes the shape of any container it is in.
If you pour coffee into a different container, the coffee will take the shape of that container. But the coffee will still take up the same amount of space. | |
train/4027 | What is the name of the colony shown? | [
"Georgia",
"Pennsylvania",
"South Carolina",
"Delaware"
] | 3 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/4028 | Which material is this origami crane made of? | [
"paper",
"porcelain"
] | 0 | closed choice | grade2 | 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 origami crane.
The origami crane is made of paper.
Paper can be folded into many shapes, such as cranes and airplanes. | |
train/4029 | Which property do these two objects have in common? | [
"bouncy",
"yellow"
] | 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.
Yellow is a color.
This color is yellow. Both objects are yellow.
A bouncy object will bounce back from the floor if you drop it. Neither of the objects are bouncy.
The property that both objects have in common is yellow. |
train/4030 | What is the name of the colony shown? | [
"Virginia",
"Maine",
"Massachusetts",
"West Virginia"
] | 0 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Virginia.
The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony. | ||
train/4031 | Which property do these two objects have in common? | [
"rough",
"slippery"
] | 0 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A rough object feels scratchy when you touch it. Both objects are rough.
A slippery object is hard to hold onto or stand on. Neither of the objects are slippery.
The property that both objects have in common is rough. |
train/4032 | Which of these states is farthest east? | [
"Indiana",
"Utah",
"Louisiana",
"North Dakota"
] | 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. Indiana is farthest east. | |
train/4033 | What can Kaylee and Jeffrey trade to each get what they want? | [
"Jeffrey can trade his almonds for Kaylee's tomatoes.",
"Kaylee can trade her tomatoes for Jeffrey's sandwich.",
"Jeffrey can trade his broccoli for Kaylee's oranges.",
"Kaylee can trade her tomatoes for Jeffrey'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.
Kaylee and Jeffrey open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Kaylee wante... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Kaylee wanted broccoli in her lunch and Jeffrey was hoping for tomatoes. Look at the labeled part of the images.
Kaylee has tomatoes. Jeffrey 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/4034 | What type of rock is diorite? | [
"igneous",
"sedimentary"
] | 0 | Diorite is a type of rock. When melted rock cools below the earth's surface, it can form diorite. Diorite is usually made of large mineral grains. | 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... | Diorite 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/4035 | Which of the following could Rosa and Suzie's test show? | [
"if the concrete from each batch took the same amount of time to dry",
"if a new batch of concrete was firm enough to use"
] | 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/4036 | Which animal's legs are also adapted for wading? | [
"great egret",
"African fish eagle"
] | 0 | Shoebills live near marshes and lakes in Africa. They eat fish, frogs, and small reptiles that live in shallow water. Shoebills hunt their prey by walking through water, or wading.
The 's legs are adapted for wading. They are lightweight and keep the bird's body above the water.
Figure: shoebill. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the shoebill.
Long legs help the shoebill keep its body above the surface of the water while wading. Thin legs are easier to move through the water.
Now look at each animal. Figure out which animal has a similar adaptation.
The great egret has long, thin legs. Its legs are adapted for wading.
The... |
train/4037 | Select the amphibian below. | [
"piranha",
"blue-footed booby",
"western toad",
"woodpecker"
] | 2 | Amphibians have moist skin and begin their lives in water.
Amphibians are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A poison dart frog is an example of an amphibian. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | A western toad is an amphibian. It has moist skin and begins its life in water.
Toads do not have teeth! They swallow their food whole.
A woodpecker is a bird. It has feathers, two wings, and a beak.
Woodpeckers have strong beaks. They use their beaks to drill into wood to hunt for food.
A piranha is a fish. It lives u... |
train/4038 | Is tillite a mineral or a rock? | [
"mineral",
"rock"
] | 1 | Tillite has the following properties:
no fixed crystal structure
made up of coarse and fine sediment grains
solid
found in nature
not made by living things
not a pure substance | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | The properties of tillite match the properties of a rock. So, tillite is a rock. |
train/4039 | As Jill pulls on the leash, what is the direction of the opposing force? | [
"forward",
"backward"
] | 0 | 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.
Jill and her dog, Sparky, are stopped while on a walk. Sparky sees a squirrel and tugs on his leash. Think about two of the forces that act on the leash:
Jill pulls... | 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 Jill pulls on the leash.
Jill and her dog, Sparky, are stopped while on a walk. Sparky sees a squirrel and tugs on his leash. Think about two of the forces that act on the leash:
Jill pulls backward.
Sparky pulls forward.
The text tells you that Jill pulls backward. The opposite direction is forward.... |
train/4040 | What is the name of the colony shown? | [
"Iowa",
"North Carolina",
"Maryland",
"Washington, D.C."
] | 2 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/4041 | What is the capital of Missouri? | [
"Jefferson City",
"Saint Paul",
"Saint Louis",
"Kansas City"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Jefferson City is the capital of Missouri. | ||
train/4042 | What are the fingers of a banana plant? | [
"the bananas",
"the stems"
] | 0 | Read the passage about bananas.
Bananas grow on banana plants in large bunches. Each group of bananas in a bunch is called a hand, and each banana is a finger.
Banana plants may look like trees, but they're not. They don't have trunks. Instead, they have thick stems made of leaves. Banana plants are chopped down once a... | closed choice | grade2 | language science | reading-comprehension | Independent reading comprehension | Read and understand informational passages | Look at the passage. It tells you what the fingers of a banana plant are.
Bananas grow on banana plants in large bunches. Each group of bananas in a bunch is called a hand, and each banana is a finger. | |
train/4043 | What is the capital of Texas? | [
"Austin",
"Atlanta",
"Houston",
"Dallas"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | ||
train/4044 | Which solution has a higher concentration of pink particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container.
Use the concentration formula to find the number of pink particles per milliliter.
... |
train/4045 | Which of these cities is marked on the map? | [
"San Francisco",
"Portland",
"Salt Lake City",
"San Diego"
] | 3 | closed choice | grade5 | social science | geography | Cities | Cities of the West | The city is San Diego, California. Portland, Salt Lake City, and San Francisco are marked with gray circles on the map below. | ||
train/4046 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Taj Mahal.
The Taj Mahal receives over two million visitors each year. A large group of tourists got soaked during a rainstorm there last week.
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 | grade5 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
The Taj Mahal receives over two million visitors each year. A large group of tourists got soaked during a rainstorm there last week.
The underlined part of the passage tells you about a rainstorm that happened at the Taj Mahal last week. This passage describes the atmosphere at a certain pla... |
train/4047 | Which country is highlighted? | [
"Kiribati",
"Tuvalu",
"Papua New Guinea",
"Nauru"
] | 0 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | ||
train/4048 | What is the capital of Connecticut? | [
"Boston",
"Hartford",
"New Haven",
"Bridgeport"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Hartford is the capital of Connecticut. | ||
train/4049 | What happened after the Starving Time? | [
"The Virginia Company gave up Jamestown to Spanish explorers.",
"The Virginia Company only sent women and children to Jamestown.",
"The Virginia Company stopped sending colonists to Jamestown.",
"The Virginia Company started sending more colonists to Jamestown."
] | 3 | During the Starving Time in 1609, many of the first Jamestown settlers died. The timeline below shows events in Jamestown after the Starving Time. Look at the timeline. Then answer the question below. | closed choice | grade4 | social science | us-history | English colonies in North America | Jamestown: growth of a colony | Look at the timeline.
The Starving Time was between 1609 and 1610. The timeline shows that many ships arrived in Jamestown during 1610 and 1611. Those ships arrived because the Virginia Company started sending more colonists to Jamestown. Some of the new colonists were women and children, but most were men. | |
train/4050 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the left than to the right",
"to the right than to the left"
] | 1 | The diagram below shows a solution with one solute. Each solute particle is represented by a green ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time ... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 6 solute particles on the left side of the membrane and 4 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/4051 | Which material is this towel made of? | [
"porcelain",
"cotton"
] | 1 | closed choice | grade2 | 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 towel.
The towel is made of cotton.
Towels are usually made of a looped cotton fabric called terry cloth. Terry cloth towels can absorb a lot of water. | |
train/4052 | 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 | 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/4053 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample B",
"sample A"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | 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 the two samples has the same mass, but the particles in sample B 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 kinetic energy, sampl... |
train/4054 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/4055 | Select the organism in the same genus as the American white pelican. | [
"Ardea alba",
"Pelecanus rufescens",
"Bubo scandiacus"
] | 1 | This organism is an American white pelican. Its scientific name is Pelecanus erythrorhynchos. | 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... | An American white pelican's scientific name is Pelecanus erythrorhynchos. The first word of its scientific name is Pelecanus.
Ardea alba is in the genus Ardea. The first word of its scientific name is Ardea. So, Ardea alba and Pelecanus erythrorhynchos are not in the same genus.
Pelecanus rufescens is in the genus Pele... |
train/4056 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample B",
"sample A"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | 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... | 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/4057 | Which statement describes the Great Victoria Desert ecosystem? | [
"It has dry, thin soil.",
"It has only a few types of organisms."
] | 0 | Figure: Great Victoria Desert.
The Great Victoria Desert is a hot desert ecosystem located in Western Australia and South Australia. It is the largest desert in Australia! The Great Victoria Desert is home to the rare great desert skink. To stay cool during the day, great desert skinks live in holes they dig in the gro... | closed choice | grade6 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A hot desert is a type of ecosystem. Hot deserts have the following features: a small amount of rain, dry, thin soil, and many different types of organisms. So, the following statements describe the Great Victoria Desert ecosystem: a small amount of rain, dry, thin soil, and many different types of organisms. It has a ... |
train/4058 | Which property do these two objects have in common? | [
"scratchy",
"yellow"
] | 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.
Yellow is a color.
This color is yellow. Both objects are yellow.
A scratchy object is rough and itchy against your skin. Neither of the objects are scratchy.
The property that both objects have in common is yellow. |
train/4059 | Which continent is highlighted? | [
"South America",
"Australia",
"Europe",
"Africa"
] | 2 | 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 Europe. | |
train/4060 | Which month is the wettest on average in Christchurch? | [
"May",
"August",
"December"
] | 0 | Use the graph to answer the question below. | closed choice | grade3 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data.
A bar graph can be used to show the average amount of precipitation each month. Months with taller bars have more precipitation on average. | To describe the average precipitation trends in Christchurch, look at the graph.
Choice "May" is incorrect.
Choice "Aug" is incorrect.
Choice "Dec" is incorrect.
May has an average monthly precipitation of about 70 millimeters. This is higher than in any other month. So, May is the wettest month on average. |
train/4061 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the right than to the left",
"to the left than to the right"
] | 0 | The diagram below shows a solution with one solute. Each solute particle is represented by a yellow ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 8 solute particles on the left side of the membrane and 4 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/4062 | 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 shield is hard.
A bendable object can be bent without breaking. The shield is not bendable. |
train/4063 | What is the expected ratio of offspring that have Marfan syndrome to offspring that do not have Marfan syndrome? Choose the most likely ratio. | [
"2:2",
"4:0",
"0:4",
"1:3",
"3:1"
] | 1 | This passage describes the Marfan syndrome trait in humans:
Marfan syndrome is a condition that affects a protein called fibrillin. Fibrillin helps support many parts of the human body and also affects growth. Humans with Marfan syndrome tend to be taller than average and have long limbs, fingers, and toes. They may al... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring that do or do not have Marfan syndrome, consider whether each phenotype is the dominant or recessive allele's version of the Marfan syndrome trait. The question tells you that the M allele, which is for having Marfan syndrome, is dominant over the m ... |
train/4064 | What can Devin and Connor trade to each get what they want? | [
"Devin can trade his tomatoes for Connor's broccoli.",
"Connor can trade his almonds for Devin's tomatoes.",
"Connor can trade his broccoli for Devin's oranges.",
"Devin can trade his tomatoes for Connor's sandwich."
] | 0 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Devin and Connor open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Devin wanted b... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Devin wanted broccoli in his lunch and Connor was hoping for tomatoes. Look at the labeled part of the images.
Devin has tomatoes. Connor 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/4065 | Which months have average temperatures of 30°C or higher in Dubai? | [
"October through February",
"May through September",
"January through May"
] | 1 | 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 Dubai, look at the graph.
Choice "Feb" is incorrect.
Choice "May" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Choice "Jan" is incorrect.
The average temperatures in May, June, July, August, and September are all 30°C or higher. So, May through Septem... |
train/4066 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Grand Canyon.
The Grand Canyon is a steep, wide canyon that receives many visitors each year. During the summer, the temperatures at the top of the canyon are usually mild, while the bottom of the canyon is much hotter.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pat... | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
The Grand Canyon is a steep, wide canyon that receives many visitors each year. During the summer, the temperatures at the top of the canyon are usually mild, while the bottom of the canyon is much hotter.
The underlined part of the passage tells you about the usual temperature pattern at th... |
train/4067 | Which of these states is farthest south? | [
"Minnesota",
"Maine",
"Wyoming",
"Washington"
] | 2 | 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. Wyoming is farthest south. | |
train/4068 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 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 A has more mass than each particle 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 kinetic energy, sample A mus... |
train/4069 | Which country is highlighted? | [
"Saint Lucia",
"Haiti",
"Saint Vincent and the Grenadines",
"Barbados"
] | 3 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Barbados. | ||
train/4070 | What is the capital of Utah? | [
"Denver",
"Cheyenne",
"Orlando",
"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/4071 | What is the capital of South Carolina? | [
"Jackson",
"Charleston",
"Columbia",
"Baton Rouge"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Columbia is the capital of South Carolina. | ||
train/4072 | Select the organism in the same genus as the Morelet's tree frog. | [
"Crocodylus moreletii",
"Agalychnis callidryas",
"Lissotriton vulgaris"
] | 1 | This organism is a Morelet's tree frog. Its scientific name is Agalychnis moreletii. | 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 Morelet's tree frog's scientific name is Agalychnis moreletii. The first word of its scientific name is Agalychnis.
Agalychnis callidryas is in the genus Agalychnis. The first word of its scientific name is Agalychnis. So, Agalychnis callidryas and Agalychnis moreletii are in the same genus.
Lissotriton vulgaris is i... |
train/4073 | Which specific humidity level was measured within the outlined area shown? | [
"2 grams of water vapor per kilogram of air",
"11 grams of water vapor per kilogram of air",
"12 grams of water vapor per kilogram of air"
] | 0 | The map below shows humidity in the lower atmosphere on October 17, 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 North America on that day.
Look at the map. Then, answer the question below.
Data source: Unite... | 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 0 and 6 grams of water vapor per kilogram of air.
2 grams of water vapor per kilogram of... |
train/4074 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/4075 | Identify the question that Samuel's experiment can best answer. | [
"Do cardinals eat more seeds per visit from feeders containing sunflower seeds compared to feeders containing flax seeds?",
"Do cardinals visit feeders containing sunflower seeds more often than feeders containing flax seeds?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Samuel set up five pairs of platform bird feeders around his yard. He filled one feeder in each pair with sunflower seeds and the other feeder with flax seeds. For one week, Samuel watched cardinals visiting the feeders... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4076 | The United States has a federal system. Based on these definitions, which of these statements would most likely be made by a person who lives under a federal system? | [
"Both my state and national government officials have power over important issues.",
"I only pay attention to state politics since the national government has almost no power.",
"My national government officials decide most issues that come up."
] | 0 | Think about the name of the United States of America. As the name shows, the country has both a united national government and a collection of state governments. In the following questions, you will learn about the relationship between the national government and state governments. You will also learn about how state a... | closed choice | grade6 | social science | civics | Government | State and local government | ||
train/4077 | Which country is highlighted? | [
"Dominica",
"the Dominican Republic",
"Antigua and Barbuda",
"The Bahamas"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Dominica. | ||
train/4078 | Which property do these three objects have in common? | [
"soft",
"blue",
"sticky"
] | 0 | 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 soft object changes shape when pressed or squeezed. All three objects are soft.
Blue is a color.
This color is blue. The dress and the grapefruit are not blue.
A sticky object can attach or stick to other things. The dress and the tissue are not st... |
train/4079 | Which of the following organisms is the omnivore in this food web? | [
"parasitic jaeger",
"bear sedge",
"grizzly bear"
] | 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 | grade6 | 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... | Omnivores are consumers that eat both producers and other consumers. So, an omnivore has arrows pointing to it from at least one producer and at least one consumer.
The grizzly bear has an arrow pointing to it from the bilberry, which is a producer. The grizzly bear also has an arrow pointing to it from the barren-grou... |
train/4080 | Which country is highlighted? | [
"Papua New Guinea",
"Australia",
"Fiji",
"Tuvalu"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Australia.
Is Australia a country or a continent?
Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead. | ||
train/4081 | Which property do these two objects have in common? | [
"bouncy",
"soft"
] | 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 soft object changes shape when you squeeze it. Both objects are soft.
A bouncy object will bounce back from the floor if you drop it. Neither of the objects are bouncy.
The property that both objects have in common is soft. |
train/4082 | Which statement is supported by these pictures? | [
"The American lobster has legs, but Homarus hakelensis did not.",
"The American lobster has claws, and so did Homarus hakelensis."
] | 1 | Look at the two pictures below. The American lobster is a modern organism, and Homarus hakelensis is an extinct one. The American lobster has many of the traits that Homarus hakelensis 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 American lobster has claws and legs.
This fossil shows the remains of claws and legs. So, Homarus hakelensis had both claws and legs.
Choice "The American lobster has claws, and so did Homarus hakelensis." is incorrect.
This statement is supported by the pictures. You can see that the American lobster has claws. Fr... |
train/4083 | What is the probability that a bitter melon plant produced by this cross will have light brown seeds? | [
"2/4",
"4/4",
"1/4",
"3/4",
"0/4"
] | 0 | In a group of bitter melon plants, some individuals have dark brown seeds and others have light brown seeds. In this group, the gene for the seed color trait has two alleles. The allele for dark brown seeds (D) is dominant over the allele for light brown seeds (d).
This Punnett square shows a cross between two bitter m... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities 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... | |
train/4084 | Select the chemical formula for this molecule. | [
"HO",
"H2O",
"H3O2",
"H2O2"
] | 1 | closed choice | grade7 | natural science | chemistry | Atoms and molecules | Identify chemical formulas for ball-and-stick models | Every substance around you is made up of atoms. Atoms can link together to form molecules. The links between atoms in a molecule are called chemical bonds. Different molecules are made up of different chemical elements, or types of atoms, bonded together.
Scientists use both ball-and-stick models and chemical formulas ... | H is the symbol for hydrogen. According to the legend, hydrogen atoms are shown in light gray. O is the symbol for oxygen. According to the legend, oxygen atoms are shown in red. This ball-and-stick model shows a molecule with two hydrogen atoms and one oxygen atom. The chemical formula will contain the symbols H and O... | |
train/4085 | What is the expected ratio of offspring with mirror scales to offspring with normal scales? Choose the most likely ratio. | [
"2:2",
"1:3",
"3:1",
"4:0",
"0:4"
] | 3 | This passage describes the scale type trait in common carp:
Carp are large freshwater fish that are often raised for food. Before a carp is cooked, its scales are usually removed. Normally, carp are covered in small scales arranged in straight rows. But carp with mirror scales have large scales arranged in scattered pa... | 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 mirror scales or normal scales, consider whether each phenotype is the dominant or recessive allele's version of the scale type trait. The question tells you that the A allele, which is for normal scales, is dominant over the a allele, which is ... |
train/4086 | Which property do these three objects have in common? | [
"fragile",
"sticky",
"fuzzy"
] | 2 | 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 fuzzy object is covered in soft hair. All three objects are fuzzy.
A sticky object can attach or stick to other things. None of the objects are sticky.
A fragile object will break into pieces if you drop it. None of the objects are fragile.
The pro... |
train/4087 | Select the organism in the same species as the smooth newt. | [
"Lissotriton vulgaris",
"Taricha granulosa",
"Ambystoma texanum"
] | 0 | This organism is a smooth newt. Its scientific name is Lissotriton vulgaris. | 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 smooth newt's scientific name is Lissotriton vulgaris.
Taricha granulosa does not have the same scientific name as a smooth newt. So, Lissotriton vulgaris and Taricha granulosa are not in the same species.
Lissotriton vulgaris has the same scientific name as a smooth newt. So, these organisms are in the same species.... |
train/4088 | Which of these cities is marked on the map? | [
"Los Angeles",
"Denver",
"Las Vegas",
"San Jose"
] | 3 | closed choice | grade5 | social science | geography | Cities | Cities of the West | The city is San Jose, California. Los Angeles, Denver, and Las Vegas are marked with gray circles on the map below. | ||
train/4089 | Which material is this belt made of? | [
"metal",
"rubber"
] | 0 | closed choice | grade2 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the belt.
The belt is made of two materials. The buckle is made of metal. The rest of the belt is made of leather. | |
train/4090 | Is saliva a solid, a liquid, or a gas? | [
"a solid",
"a liquid",
"a gas"
] | 1 | 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... | Saliva is a liquid. A liquid can change shape. But it still takes up the same amount of space.
When a dog begs for a treat, saliva might drip from its mouth. | |
train/4091 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | 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 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/4092 | What is the capital of Texas? | [
"Annapolis",
"Dallas",
"Austin",
"Des Moines"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | ||
train/4093 | Which of these states is farthest east? | [
"Nebraska",
"Arizona",
"Oklahoma",
"Florida"
] | 3 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Florida is farthest east. | |
train/4094 | Which of the following was an independent variable in this experiment? | [
"the number of moldy blackberries",
"the temperature of the water"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Liam's grandmother suggested that soaking berries in hot water might help prevent the berries from getting moldy.
To test this idea, Liam harvested fresh blackberries and divided them evenly into eight bowls. ... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify independent and dependent variables | Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato... | |
train/4095 | Which of the following could Abdul'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/4096 | Which solution has a higher concentration of purple particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 2 | The diagram below is a model of two solutions. Each purple ball represents one particle of solute. | closed choice | grade8 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the 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/4097 | Which bird's beak is also adapted to filter through mud? | [
"rosy-faced lovebird",
"northern pintail"
] | 1 | Ringed teals eat invertebrates and plants that live near water. The shape of the 's beak is adapted to filter through mud for food.
The gathers muddy water in its beak and then pushes it out through gaps along the sides. Bits of food, such as plant roots, are left behind inside the teal's beak.
Figure: ringed teal. | 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 ringed teal.
The ringed teal has a wide, flat beak. Its beak is adapted to filter through mud. The ringed teal gathers muddy water in its beak. Then, it pushes the water out through gaps along the sides of the beak. Bits of food, such as plant roots, are left behind inside the teal's beak.
No... |
train/4098 | Which property matches this object? | [
"breakable",
"bendable"
] | 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 breakable object will break into pieces if you drop it. The silk tie is not breakable.
A bendable object can be bent without breaking. The silk tie is bendable. |
train/4099 | Complete the statement.
Nitrogen is (). | [
"a compound",
"an elementary substance"
] | 1 | The model below represents a molecule of nitrogen. itrogen gas makes up nearly 80% of the air you breathe. | closed choice | grade8 | 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 nitrogen is an elementary substance or a compound.
Step 1: Interpret the model.
In the ball-and-stick model shown above, both of the balls are the same color:
. The legend shows that blue represents the chemical element with the atomic symbol N. So, the model shows you that a molecule... |
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