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train/4900 | Which of the following could Olivia and Kayla'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/4901 | Which animal's skin is also adapted for survival in cold places? | [
"musk ox",
"blue poison dart frog"
] | 0 | live in the forests and mountains of Asia and Europe. The lynx's skin is adapted to help the animal survive in cold places.
Figure: Eurasian lynx. | 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 Eurasian lynx.
During the winter, the Eurasian lynx has thick fur covering its skin. Its skin is adapted for survival in cold places. The Eurasian lynx uses its fur to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
The musk ox has skin wi... |
train/4902 | Which property do these three objects have in common? | [
"blue",
"salty",
"sticky"
] | 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.
Potato chips have a salty taste. The bubble gum and the honey are not salty.
A sticky object can attach or stick to other things. All three objects are sticky.
Blue is a color.
This color is blue. The bubble gum and the honey are not blue.
The proper... |
train/4903 | 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. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/4904 | Complete the sentence.
Pollination is what happens when (). | [
"pollen lands on a female cone",
"sperm fuses with an egg"
] | 0 | Male cones make pollen. Wind can blow pollen from a male cone to a female cone. | closed choice | grade4 | natural science | biology | Plants | Describe and construct conifer life cycles | Conifers are plants that grow cones. Conifers use their cones to reproduce, or make new plants like themselves. How do conifers use their cones to reproduce?
Conifers can grow male and female cones. Male cones make pollen, and female cones make eggs. Pollination is what happens when wind blows pollen from male cones on... | When pollen lands on a female cone, it is called pollination. This photograph shows wind blowing pollen from the male cones on a Japanese cedar tree.
After a female cone is pollinated, its eggs can be fertilized. Fertilization is what happens when male cells from the pollen combine with eggs. |
train/4905 | 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 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/4906 | Which months have average temperatures of 30°C or higher in Dubai? | [
"October through February",
"May through September",
"July through November"
] | 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 "Jul" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
The average temperatures in May, June, July, August, and September are all 30°C or hig... |
train/4907 | Which country is highlighted? | [
"Saint Kitts and Nevis",
"Antigua and Barbuda",
"Saint Lucia",
"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 Saint Kitts and Nevis. | ||
train/4908 | What can happen to an egg and a sperm? | [
"They can fuse and form fertilized eggs.",
"They can grow into heart-shaped plants."
] | 0 | This diagram shows the life cycle of a fern. | closed choice | grade7 | natural science | biology | Plant reproduction | Moss and fern life cycles | Fern plants reproduce using both asexual reproduction and sexual reproduction.
Mature ferns have flat leaves called fronds. Ferns have structures that look like small dots on the underside of their fronds. These structures are called spore cases. The mature ferns use asexual reproduction to make spores. When the spore ... | A sperm swims through a water drop on the heart-shaped plant to get to an egg. The sperm and egg can fuse to form a fertilized egg. The fertilized egg can then grow into a mature fern.
A heart-shaped plant grows from a spore, not from a fertilized egg. |
train/4909 | Which solution has a higher concentration of green particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/4910 | Which continent is highlighted? | [
"North America",
"Antarctica",
"Europe"
] | 2 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Europe. | |
train/4911 | What is the capital of Colorado? | [
"Colorado Springs",
"Boulder",
"Denver",
"Juneau"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/4912 | What is the capital of Texas? | [
"Bismarck",
"Lexington",
"Atlanta",
"Austin"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | ||
train/4913 | 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 | 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/4914 | What is the name of the colony shown? | [
"Kentucky",
"Mississippi",
"Maryland",
"Massachusetts"
] | 3 | 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/4915 | What is the capital of New Hampshire? | [
"Providence",
"Montgomery",
"Manchester",
"Concord"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Concord is the capital of New Hampshire. | ||
train/4916 | What is the capital of Arizona? | [
"Boise",
"Phoenix",
"Frankfort",
"Tucson"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Phoenix is the capital of Arizona. | ||
train/4917 | What is the name of the colony shown? | [
"Rhode Island",
"Vermont",
"Virginia",
"Maine"
] | 0 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Rhode Island. | ||
train/4918 | In this food web, which organism contains matter that eventually moves to the mushroom? | [
"rough-legged hawk",
"barren-ground caribou"
] | 1 | 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 | grade7 | natural science | biology | Ecological interactions | Interpret food webs II | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows to the mushroom.There are two paths matter can take from the barren-ground caribou to the mushroom: barren-ground caribou->mushroom. barren-ground caribou->grizzly bear->mushroom. There is one path matt... |
train/4919 | Which of these states is farthest east? | [
"Mississippi",
"Indiana",
"Pennsylvania",
"Wisconsin"
] | 2 | 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. Pennsylvania is farthest east. | |
train/4920 | What is the capital of Arizona? | [
"Newport",
"Tallahassee",
"Tucson",
"Phoenix"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Phoenix is the capital of Arizona. | ||
train/4921 | Complete the statement.
Methanol is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents a molecule of methanol. Methanol is found in antifreeze, which is used in car engines to prevent certain liquids from freezing in cold weather. | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | All substances are made of one or more chemical elements, or types of atoms. Substances that are made of only one chemical element are elementary substances. Substances that are made of two or more chemical elements bonded together are compounds.
Every chemical element is represented by its own symbol. For some element... | Count the number of chemical elements represented in the model. Then, decide if methanol is an elementary substance or a compound.
In this model, each ball is labeled with C for carbon, H for hydrogen, or O for oxygen. So, the model shows you that methanol is made of three chemical elements bonded together.
Substances ... |
train/4922 | Which of these states is farthest west? | [
"South Carolina",
"Florida",
"Missouri",
"Ohio"
] | 2 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Missouri is farthest west. | |
train/4923 | What is the name of the colony shown? | [
"Connecticut",
"West Virginia",
"Maryland",
"Rhode Island"
] | 3 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Rhode Island. | ||
train/4924 | 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 purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 5 solute particles on the left side of the membrane and 3 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/4925 | What is the name of the colony shown? | [
"New Hampshire",
"Maryland",
"Washington, D.C.",
"Maine"
] | 1 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/4926 | Is wet paint a solid, a liquid, or a gas? | [
"a gas",
"a liquid",
"a solid"
] | 1 | closed choice | grade2 | natural science | physics | States of matter | Classify matter as solid, liquid, or gas | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a shape of its own.
Some solids can be bent or broken easily. Others are hard to bend or break.
A glass cup is a solid. A sock is also a solid.
When matter i... | Wet paint is a liquid. A liquid takes the shape of any container it is in.
If you pour wet paint out of a can, the paint will change shape. But the wet paint will still take up the same amount of space. | |
train/4927 | Which country is highlighted? | [
"Kiribati",
"the Marshall Islands",
"Nauru",
"Tuvalu"
] | 0 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | ||
train/4928 | Identify the question that Rudy's experiment can best answer. | [
"Does the type of flour used in the muffins affect the number of muffins that turn brown after 30 minutes in the oven?",
"Do muffins made with white flour have larger volumes than muffins made with whole wheat flour?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Rudy made six batches of muffins over the course of one day. He used whole wheat flour in three of the batches and white flour in the other three batches. He divided the batter into muffin tins, using two ounces of batt... | 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/4929 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample B",
"sample A"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample A 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 kinetic energy, sampl... |
train/4930 | What is the capital of Maine? | [
"Portland",
"Augusta",
"Hartford",
"Annapolis"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Augusta is the capital of Maine. | ||
train/4931 | What can Mary and Lisa trade to each get what they want? | [
"Mary can trade her tomatoes for Lisa's carrots.",
"Lisa can trade her almonds for Mary's tomatoes.",
"Mary can trade her tomatoes for Lisa's broccoli.",
"Lisa can trade her broccoli for Mary's oranges."
] | 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.
Mary and Lisa open their lunch boxes in the school cafeteria. Neither Mary nor Lisa got everything that they wanted. The table be... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Mary wants broccoli. Lisa 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/4932 | Select the organism in the same species as the great gray owl. | [
"Strix nebulosa",
"Cyanocitta stelleri",
"Goura scheepmakeri"
] | 0 | This organism is a great gray owl. Its scientific name is Strix nebulosa. | 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 great gray owl's scientific name is Strix nebulosa.
Cyanocitta stelleri does not have the same scientific name as a great gray owl. So, Strix nebulosa and Cyanocitta stelleri are not in the same species.
Goura scheepmakeri does not have the same scientific name as a great gray owl. So, Strix nebulosa and Goura scheep... |
train/4933 | Which better describes the Jackson Reef ecosystem? | [
"It has salty water. It also has only a few types of organisms.",
"It has salty water. It also has many different types of organisms."
] | 1 | Figure: Jackson Reef.
Jackson Reef is a tropical coral reef ecosystem in the Red Sea, near Egypt. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A tropical coral reef is a type of ecosystem. Tropical coral reefs have the following features: shallow, salty water, bright sunlight, and many different types of organisms. So, Jackson Reef has salty water. It also has many different types of organisms. |
train/4934 | In this experiment, which were part of an experimental group? | [
"the uncovered side mirrors",
"the covered side mirrors"
] | 1 | The passage below describes an experiment.
On winter mornings, Elizabeth had to scrape the ice off of the windshield and side mirrors of her car. Her friend told her that she should cover her side mirrors with plastic bags overnight to stop ice from forming.
One winter night, Elizabeth secured a plastic bag over one o... | 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, Elizabeth investigated whether covering side mirrors with plastic bags affects how much ice forms on the mirrors. So, the covered side mirrors were part of an experimental group.
There were no bags on the uncovered side mirrors. So, they were not part of an experimental group. |
train/4935 | Which i in column 2? | [
"the police department",
"the grocery store",
"the park",
"the fire department"
] | 2 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The park is in column 2. | |
train/4936 | What is the capital of Alaska? | [
"Juneau",
"Honolulu",
"Salem",
"Jefferson City"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Juneau is the capital of Alaska. | ||
train/4937 | What is the capital of Connecticut? | [
"Bridgeport",
"Hartford",
"Providence",
"New Haven"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Hartford is the capital of Connecticut. | ||
train/4938 | What is the capital of New Hampshire? | [
"Augusta",
"Manchester",
"Frankfort",
"Concord"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Concord is the capital of New Hampshire. | ||
train/4939 | Which cones make eggs? | [
"male cones",
"female cones"
] | 1 | This diagram shows the life cycle of a pine tree. | closed choice | grade8 | natural science | biology | Plant reproduction | Angiosperm and conifer life cycles | Gymnosperms are plants that have seeds but not flowers. Conifers are a type of a gymnosperm. Instead of flowers, conifers have cones. Conifers use their cones for sexual reproduction.
Most conifer trees have both male and female cones. The male cones produce pollen. The female cones produce eggs and a sticky substance ... | Female cones make eggs. The eggs are found at the base of the female cone's scales.
Male cones produce pollen, not eggs. |
train/4940 | What type of rock is eclogite? | [
"sedimentary",
"metamorphic",
"igneous"
] | 1 | Eclogite forms deep below the earth's surface. The rock is made of minerals such as garnet and pyroxene.
Eclogite can form when a rock is changed by high temperature and pressure. It is rarely found at the earth's surface. Most of the eclogite is present in the earth's mantle. | 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 ... | Eclogite is a metamorphic rock. Like other metamorphic rocks, it forms when a rock is changed by high temperature and pressure.
Heat and pressure can change the type and arrangement of minerals in a rock. This change forms a new rock with different properties. Eclogite can form when igneous rocks are changed by heat an... |
train/4941 | What can Russell and Albert trade to each get what they want? | [
"Albert can trade his broccoli for Russell's oranges.",
"Russell can trade his tomatoes for Albert's broccoli.",
"Albert can trade his almonds for Russell's tomatoes.",
"Russell can trade his tomatoes for Albert's carrots."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Russell and Albert open their lunch boxes in the school cafeteria. Neither Russell nor Albert got everything that they wanted. Th... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Russell wants broccoli. Albert 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/4942 | What type of rock is pumice? | [
"metamorphic",
"sedimentary",
"igneous"
] | 2 | This is a piece of pumice. Do you see the hollow gaps in this piece of rock? The gaps come from air and water bubbles that became trapped while the rock was forming.
Pumice is usually formed near volcanoes. Sometimes, the lava in a volcano can cool very quickly. Pumice forms when the lava traps air and water bubbles as... | 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 ... | Pumice 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. Pumice forms from a type of lava that is rich in silica. As the lava erupts from a volcano, it can trap small bubbles of air or water. When the lava becomes solid, the bub... |
train/4943 | Which animal's limbs are also adapted for swimming? | [
"bottlenose dolphin",
"cheetah"
] | 0 | s live in the Galapagos Islands. They spend a lot of time hunting fish at sea.
The has four flippers for limbs. Its limbs are adapted for swimming.
Figure: Galapagos sea lion. | 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 Galapagos sea lion.
The Galapagos sea lion uses its flippers to push itself through water. The flippers can also help it change direction while swimming.
Now look at each animal. Figure out which animal has a similar adaptation.
The bottlenose dolphin has flippers. Its limbs are adapted for s... |
train/4944 | Complete the following statement.
In this population, black fur and brown fur are () of the fur color (). | [
"traits . . . variation",
"variations . . . trait"
] | 1 | A population is a group of individuals of the same species that live in the same place. The individuals in a population often have differences in their traits. These differences are called variations.
Figure: mice from the population. | closed choice | grade6 | natural science | biology | Adaptations and natural selection | Introduction to natural selection | The ways that an organism looks or acts are its traits. Variations are the differences between the traits of individuals.
In the population of mice, fur color is a trait. Some of the mice have brown fur, and others have black fur. So, in this population, black fur and brown fur are variations of the fur color trait. | |
train/4945 | Which of the following could Cooper's test show? | [
"whether a parachute with a 1 m vent would swing too much at 400 km per hour",
"if the spacecraft was damaged when using a parachute with a 1 m vent going 200 km per hour",
"how steady a parachute with a 1 m vent was at 200 km per hour"
] | 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/4946 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each refrigerator",
"each refrigerator . . . the surroundings"
] | 0 | Two identical refrigerators in a restaurant kitchen lost power. The door of one fridge was slightly open, and the door of the other fridge was closed. This table shows how the temperature of each refrigerator changed over 10minutes. | 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 refrigerator increased, which means that the thermal energy of each refrigerator increased. So, thermal energy was transferred from the surroundings to each refrigerator. |
train/4947 | Which two months have the lowest average precipitation in Salt Lake City? | [
"November and December",
"July and August",
"February and March"
] | 1 | Use the graph to answer the question below. | closed choice | grade3 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data.
A bar graph can be used to show the average amount of precipitation each month. Months with taller bars have more precipitation on average. | To describe the average precipitation trends in Salt Lake City, look at the graph.
Choice "Feb" is incorrect.
Choice "Mar" is incorrect.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Nov" is incorrect.
Choice "Dec" is incorrect.
July and August each have an average precipitation of less than 1 inch. All... |
train/4948 | Does Microcebus rufus have cells that have a nucleus? | [
"yes",
"no"
] | 0 | This organism is Microcebus rufus. It is a member of the animal kingdom.
Microcebus rufus is commonly called a brown mouse lemur. Humans, chimpanzees, gorillas, monkeys, and lemurs are all primates. A brown mouse lemur is one of the smallest primates in the world! | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Microcebus rufus is an animal. Animal cells have a nucleus. |
train/4949 | Which better describes the Gobi Desert ecosystem? | [
"It has warm, wet summers. It also has long, cold winters.",
"It has long, cold winters. It also has a small amount of rain or snow."
] | 1 | Figure: Gobi Desert.
The Gobi Desert is a cold desert ecosystem in northern China and southern Mongolia. | 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 Gobi Desert has long, cold winters. It also has a small amount of rain or snow. |
train/4950 | Which of the following could Jason's test show? | [
"whether an inexpensive filter would become clogged more often",
"the amount of bacteria in the water before it was filtered",
"whether the filter was clogged"
] | 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/4951 | Which animal is also adapted for climbing trees? | [
"red-shanked douc",
"Grevy's zebra"
] | 0 | s live in rain forests on the island of Sumatra in Asia. They climb trees to find food and shelter. The orangutan's hands and feet 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.
The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with thick fur m... | Look at the picture of the Sumatran orangutan.
The Sumatran orangutan has long fingers and toes. It is adapted for climbing trees. The Sumatran orangutan uses its long fingers and toes to hold on to branches while climbing.
Now look at each animal. Figure out which animal has a similar adaptation.
The red-shanked douc ... |
train/4952 | Which of these cities is marked on the map? | [
"Philadelphia",
"Pittsburgh",
"Baltimore",
"New York City"
] | 1 | closed choice | grade5 | social science | geography | Cities | Cities of the Northeast | The city is Pittsburgh, Pennsylvania. Philadelphia, New York City, and Baltimore are marked with gray circles on the map below. | ||
train/4953 | Which is this organism's common name? | [
"Giraffa camelopardalis",
"giraffe"
] | 1 | This organism is a giraffe. It is also called Giraffa camelopardalis. | closed choice | grade7 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Giraffa camelopardalis is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Giraffa camelopardalis is the organism's scientific name. So, you know that giraffe is the common name. |
train/4954 | Which bird's beak is also adapted to crack large, hard nuts? | [
"northern mockingbird",
"hyacinth macaw"
] | 1 | Palm cockatoos eat large seeds and nuts. The shape of the 's beak is adapted to crack open large, hard nuts.
Figure: palm cockatoo. | 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 palm cockatoo.
The palm cockatoo has a thick hooked beak. Its beak is adapted to crack large, hard nuts. The palm cockatoo 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 it.
Now look at each ... |
train/4955 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/4956 | Which of these cities is marked on the map? | [
"Detroit",
"Denver",
"Seattle",
"Philadelphia"
] | 3 | closed choice | grade5 | social science | geography | Cities | Major U.S. cities | The city is Philadelphia, Pennsylvania. Denver, Detroit, and Seattle are marked with gray circles on the map below. | ||
train/4957 | What is the capital of Maine? | [
"Portland",
"Harrisburg",
"Indianapolis",
"Augusta"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Augusta is the capital of Maine. | ||
train/4958 | What is the capital of Maine? | [
"Buffalo",
"Augusta",
"Portland",
"Hartford"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Augusta is the capital of Maine. | ||
train/4959 | Which country is highlighted? | [
"the Marshall Islands",
"Nauru",
"Tuvalu",
"Kiribati"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | ||
train/4960 | Mesopotamia was the site of one of the earliest civilizations. Which letter marks Mesopotamia? | [
"A",
"B",
"D",
"C"
] | 1 | Many of the first civilizations started around big rivers. Civilizations are organized human communities. Look at the map of early river civilizations. | closed choice | grade7 | social science | world-history | Ancient Mesopotamia | Early Mesopotamia | Look at the map below. It labels ancient Mesopotamia and other ancient civilizations.
The first civilization in ancient Mesopotamia started along the Tigris and Euphrates Rivers. Other ancient civilizations also started near rivers. For example, ancient Egyptian civilizations started along the Nile River, ancient Indus... | |
train/4961 | Which of these continents does the equator intersect? | [
"South America",
"Australia",
"North America"
] | 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 equator is the line at 0° latitude. It intersects South America. It does not intersect North America or Australia. | |
train/4962 | Which better describes the Jackson Reef ecosystem? | [
"It has bright sunlight. It also has shallow water.",
"It has water with not much salt. It also has only a few types of organisms."
] | 0 | Figure: Jackson Reef.
Jackson Reef is a tropical coral reef ecosystem in the Red Sea, near Egypt. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A tropical coral reef is a type of ecosystem. Tropical coral reefs have the following features: shallow, salty water, bright sunlight, and many different types of organisms. So, Jackson Reef has bright sunlight. It also has shallow water. |
train/4963 | Which continent is highlighted? | [
"Africa",
"Asia",
"South America",
"Europe"
] | 3 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Europe. | |
train/4964 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Vancouver Island.
Vancouver Island is on the west coast of Canada. It is usually rainy there during the winter months.
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 | grade4 | 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.
Vancouver Island is on the west coast of Canada. It is usually rainy there during the winter months.
The underlined part of the passage tells you about the usual pattern of precipitation in Vancouver Island. This passage does not describe what the weather is like on a particular day. So, thi... |
train/4965 | What is the capital of California? | [
"Phoenix",
"Sacramento",
"Omaha",
"Madison"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Sacramento is the capital of California. | ||
train/4966 | Which of the following could Dean's test show? | [
"if the spacecraft was damaged when using a parachute with a 1 m vent going 200 km per hour",
"whether a parachute with a 1 m vent would swing too much at 400 km per hour",
"how steady a parachute with a 1 m vent was at 200 km per hour"
] | 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/4967 | 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"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | 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/4968 | Complete the sentence.
The Reykjanes Ridge formed at a () boundary. | [
"divergent",
"convergent",
"transform"
] | 0 | Read the passage and look at the picture.
The Reykjanes Ridge is part of the Mid-Atlantic Ridge, a mid-ocean ridge that is mostly under water. The Reykjanes Ridge is one place where the Mid-Atlantic Ridge is above water. The Reykjanes Ridge runs through Iceland, an island country in the North Atlantic Ocean. The ridge ... | closed choice | grade8 | natural science | earth-science | Plate tectonics | Describe tectonic plate boundaries around the world | The outer layer of Earth is broken up into many pieces called tectonic plates, or simply plates. The breaks between plates are called plate boundaries. Plate boundaries are classified by the way the plates are moving relative to each other:
At a transform boundary, two plates are sliding past each other.
At a convergen... | To figure out what type of plate boundary formed the Reykjanes Ridge, you need to know how the tectonic plates interacted. To find this out, read the passage carefully.
The Reykjanes Ridge is part of the Mid-Atlantic Ridge, a mid-ocean ridge that is mostly under water. The Reykjanes Ridge is one place where the Mid-Atl... |
train/4969 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"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 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/4970 | Which property do these three objects have in common? | [
"transparent",
"bumpy",
"smooth"
] | 1 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A smooth object is not scratchy or rough. The tree bark and the pineapple are not smooth.
You can see clearly through a transparent object. None of the objects are transparent.
A bumpy object is covered in lumps and bumps. All three objects are bumpy... |
train/4971 | Why did Helen have to learn words in a different way? | [
"She was bored.",
"She was blind and deaf."
] | 1 | Read the passage about Helen Keller.
Helen Keller became deaf and blind as a child. She couldn't hear or see. So, she had to learn words in a different way. Helen's teacher used finger spelling to teach her. She wrote words on Helen's hand with her finger.
Helen learned many words this way. In fact, she grew up to beco... | closed choice | grade2 | language science | reading-comprehension | Independent reading comprehension | Read and understand informational passages | Look at the passage. It tells you why Helen had to learn words in a different way.
Helen Keller became deaf and blind as a child. She couldn't hear or see. So, she had to learn words in a different way. Helen's teacher used finger spelling to teach her. She wrote words on Helen's hand with her finger. | |
train/4972 | Which of these states is farthest east? | [
"North Dakota",
"Idaho",
"California",
"New Mexico"
] | 0 | 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. North Dakota is farthest east. | |
train/4973 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The smaller the magnets, the smaller the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is smaller in Pair 1 than in Pair 2. So, the magnit... |
train/4974 | Which material is this chair made of? | [
"wood",
"porcelain"
] | 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 chair.
The chair is made of two different materials. The legs are made of metal, and the back and seat are made of wood.
Chairs can be made of many different materials, such as plastic. Are you sitting on a chair? If so, what is it made of? | |
train/4975 | What is the capital of Delaware? | [
"Providence",
"Dover",
"Columbus",
"Sacramento"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/4976 | As the boys pull on the rope, what is the direction of the opposing force? | [
"away from the girls",
"toward the girls"
] | 1 | The text below describes a pair of opposing forces. Opposing forces act on an object in opposite directions. Read the text. Then answer the question below.
A group of boys plays a game of tug-of-war with a group of girls. Think about two of the forces that act on the rope:
The girls pull toward themselves.
The boys pul... | 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 the boys pull on the rope.
A group of boys plays a game of tug-of-war with a group of girls. Think about two of the forces that act on the rope:
The girls pull toward themselves.
The boys pull away from the girls.
The text tells you that the boys pull away from the girls. The opposite direction is to... |
train/4977 | What is the capital of Virginia? | [
"Chicago",
"Olympia",
"Richmond",
"Norfolk"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Richmond is the capital of Virginia. | ||
train/4978 | What is the capital of Tennessee? | [
"Nashville",
"Memphis",
"Birmingham",
"Richmond"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Nashville is the capital of Tennessee. | ||
train/4979 | Which of the following could Karen and Belle'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/4980 | What is the name of the colony shown? | [
"South Carolina",
"Connecticut",
"North Carolina",
"West Virginia"
] | 0 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is South Carolina. | ||
train/4981 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in sample B has more mass than each particle in sample A. The particles in sample B also have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average ... |
train/4982 | Which of the following could Kelly and Jenny's test show? | [
"if a new batch of concrete was firm enough to use",
"if the concrete from each batch took the same amount of time to dry"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade6 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/4983 | Which specific humidity level was measured within the outlined area shown? | [
"11 grams of water vapor per kilogram of air",
"12 grams of water vapor per kilogram of air",
"4 grams of water vapor per kilogram of air"
] | 2 | The map below shows humidity in the lower atmosphere on 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.
4 grams of water vapor per kilogram of... |
train/4984 | What is the capital of Arizona? | [
"Salt Lake City",
"Tucson",
"Phoenix",
"Providence"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Phoenix is the capital of Arizona. | ||
train/4985 | Which of the following organisms is the primary consumer in this food web? | [
"black bear",
"parasol fungus",
"bolete fungus",
"silver maple"
] | 0 | Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade7 | natural science | biology | Ecological interactions | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Primary consumers eat producers. So, in a food web, primary consumers have arrows pointing to them from producers.
The bolete fungus has arrows pointing to it from the black racer, the gray fox, and the bobcat. None of these organisms is a producer, so the bolete fungus is not a primary consumer.
The black bear has an ... |
train/4986 | Which better describes the Everglades National Park ecosystem? | [
"It has soil that is poor in nutrients. It also has other water ecosystems nearby.",
"It has soil that is rich in nutrients. It also has other water ecosystems nearby."
] | 1 | Figure: Everglades National Park.
Everglades National Park is a wetland ecosystem in southern Florida. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A wetland is a type of ecosystem. Wetlands have the following features: land that is covered with water during most of the year, soil that is rich in nutrients, and other water ecosystems nearby. So, Everglades National Park has soil that is rich in nutrients. It also has other water ecosystems nearby. |
train/4987 | Which property matches this object? | [
"sour",
"yellow"
] | 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.
Yellow is a color.
This color is yellow. The dill pickles are not yellow.
A lemon has a sour taste. The dill pickles are sour. |
train/4988 | Which animal's mouth is also adapted to eat plant matter? | [
"spotted hyena",
"kudu"
] | 1 | Zebras are herbivores, or plant eaters. They eat grass. The 's mouth is adapted to grind up and eat plant matter.
Figure: zebra. | 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 zebra.
The zebra has long jaws and flat teeth. Its mouth is adapted to eat plant matter. The long jaws can help the zebra reach grass. The flat teeth can help it cut and grind up the food into soft pieces it can swallow.
Now look at each animal. Figure out which animal has a similar adaptatio... |
train/4989 | What evidence of erosion does this picture show? | [
"There is a deep, narrow canyon.",
"The rocks in the canyon have a reddish color."
] | 0 | Erosion is what happens when loose pieces of rock are carried away by water, wind, or ice.
This is a picture of the Grand Canyon. The Grand Canyon was formed as a result of erosion over millions of years. | 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/4990 | Which country is highlighted? | [
"Jamaica",
"Cuba",
"The Bahamas",
"Haiti"
] | 3 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Haiti.
Does Haiti have any territorial disputes?
Haiti claims to own Navassa Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
Navassa Island is also claimed by the United States. The United States claimed the island in 18... | ||
train/4991 | Which bird's beak is also adapted to tear through meat? | [
"cassowary",
"California condor"
] | 1 | s are scavengers. They find and eat the bodies of dead animals. The shape of the 's beak is adapted to tear through meat.
Figure: Cape vulture. | 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 Cape vulture.
The Cape vulture has a sharp hooked beak. Its beak is adapted to tear through meat. The sharp hook can help the Cape vulture cut the meat into pieces it can swallow.
Now look at each bird. Figure out which bird has a similar adaptation.
The California condor has a sharp hooked b... |
train/4992 | In this food web, which organism contains matter that eventually moves to the sea cucumber? | [
"black rockfish",
"bat star",
"orca",
"kelp bass"
] | 2 | 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 | grade6 | natural science | biology | Ecological interactions | Interpret food webs II | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows to the sea cucumber.
No arrows point from the bat star to any other organisms. So, in this food web, matter does not move from the bat star to the sea cucumber.
The only arrow pointing from the black ro... |
train/4993 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in 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/4994 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 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 greater distance between magnets, the magni... |
train/4995 | Select the amphibian below. | [
"olive toad",
"bison"
] | 0 | Amphibians have moist skin and begin their lives in water. A red salamander is an example of an amphibian. | 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. | An olive toad is an amphibian. It has moist skin and begins its life in water.
A bison is a mammal. It has fur and feeds its young milk. |
train/4996 | What can Chad and Warren trade to each get what they want? | [
"Chad can trade his tomatoes for Warren's broccoli.",
"Chad can trade his tomatoes for Warren's carrots.",
"Warren can trade his broccoli for Chad's oranges.",
"Warren can trade his almonds for Chad's tomatoes."
] | 0 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Chad and Warren open their lunch boxes in the school cafeteria. Neither Chad nor Warren got everything that they wanted. The tabl... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Chad wants broccoli. Warren 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/4997 | Which property do these four objects have in common? | [
"hard",
"opaque",
"translucent"
] | 1 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A hard object does not change shape when pressed or squeezed. The slide and the crown are hard, but the lemon and the paper crane are not.
An opaque object does not let light through. All four objects are opaque.
A translucent object lets light throu... |
train/4998 | What is the capital of Mississippi? | [
"Jefferson City",
"Jackson",
"Colorado Springs",
"Honolulu"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Jackson is the capital of Mississippi. | ||
train/4999 | Where does the thin brown stalk grow? | [
"on top of the male part",
"on top of the female part"
] | 1 | This diagram shows the life cycle of a moss. | closed choice | grade7 | natural science | biology | Plant reproduction | Moss and fern life cycles | Moss plants reproduce using both asexual reproduction and sexual reproduction.
Moss plants use their male and female parts for sexual reproduction. The male parts produce sperm. Moss live in damp environments, and moss sperm can travel through water to the female parts.
The sperm fuse with eggs in the female part. This... | The sperm and egg fuse to form a fertilized egg. The fertilized egg grows into a thin brown stalk on top of the female part of the parent moss plant. |
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