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train/300 | Which country is highlighted? | [
"Palau",
"Tuvalu",
"Nauru",
"Kiribati"
] | 3 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | ||
train/301 | Which country is highlighted? | [
"Cuba",
"Jamaica",
"Haiti",
"Dominica"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Jamaica. | ||
train/302 | In this food chain, the diatom is a producer. Why? | [
"It eats another organism.",
"It makes its own food.",
"It eats a consumer."
] | 1 | This diagram shows a food chain from the River Frome, a freshwater ecosystem in England. | 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 diatom is a producer because it makes its own food. The diatom uses carbon dioxide, water, and sunlight to make its own food. |
train/303 | Which rhetorical appeal is primarily used in this ad? | [
"ethos (character)",
"pathos (emotion)",
"logos (reason)"
] | 1 | closed choice | grade12 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals.
Appeals to ethos, or character, show the writer or speaker as trustworthy, authoritative, or sharing important values with the audience. An ad that appe... | The ad appeals to pathos, or emotion, by drawing on the reader's desire to stand out. | |
train/304 | Which better describes the Coral Triangle ecosystem? | [
"It has water with not much salt. It also has only a few types of organisms.",
"It has many different types of organisms. It also has shallow water."
] | 1 | Figure: Coral Triangle.
The Coral Triangle is a tropical coral reef ecosystem in the western Pacific Ocean. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | 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, the Coral Triangle has many different types of organisms. It also has shallow water. |
train/305 | What is this trapdoor spider's scientific name? | [
"Aptostichus cabrillo",
"Aptostichus stephencolberti"
] | 1 | This species of trapdoor spider lives in sand dunes on the coast of California. This species was discovered in 2007 and is named after the comedian Stephen Colbert. | closed choice | grade4 | natural science | biology | Scientific names | Origins of scientific names | When a scientist identifies a new organism, he or she chooses its scientific name.
Sometimes, an organism is named after the place where it was first found. Other times, an organism is named after the scientist who first identified it. Or, the scientific name might describe the organism's physical traits.
Many of the w... | This organism's scientific name refers to Stephen Colbert.
The word stephencolberti refers to Stephen Colbert. So, this trapdoor spider's scientific name is Aptostichus stephencolberti. |
train/306 | What is the capital of Utah? | [
"Provo",
"Salt Lake City",
"Indianapolis",
"Salem"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Salt Lake City is the capital of Utah. | ||
train/307 | Which part of a moss plant produces spores? | [
"the sperm",
"thin brown stalks"
] | 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... | A moss plant's thin brown stalks produce spores. The spores are released from the capsule at the top of the stalks.
Sperm fuses with eggs to form fertilized eggs. Sperm do not produce spores. |
train/308 | Which property do these four objects have in common? | [
"soft",
"smooth",
"shiny"
] | 0 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A smooth object is not scratchy or rough. The stuffed dice are not smooth.
A soft object changes shape when pressed or squeezed. All four objects are soft.
A shiny object reflects a lot of light. You can usually see your reflection in a shiny object.... |
train/309 | Which property do these four objects have in common? | [
"salty",
"sweet",
"rough"
] | 2 | 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 rough object feels scratchy when you touch it. All four objects are rough.
Potato chips have a salty taste. The pineapple is not salty.
Sugar has a sweet taste. The pineapple is sweet, but the rock are not.
The property that all four objects have i... |
train/310 | What is the name of the colony shown? | [
"North Carolina",
"Indiana",
"Virginia",
"West Virginia"
] | 2 | closed choice | grade8 | 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/311 | Which of the following could Nolan'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/312 | Which ocean is highlighted? | [
"the Atlantic Ocean",
"the Indian Ocean",
"the Arctic Ocean",
"the Southern Ocean"
] | 0 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Atlantic Ocean. | |
train/313 | Based on the arrows, which of the following living things is a consumer? | [
"kelp",
"plainfin midshipman"
] | 1 | Below is a food web from an ocean ecosystem. The ecosystem is in Monterey Bay, off the coast of California.
A food web is a model that shows how the matter eaten by living things moves through an ecosystem. The arrows show how matter moves through the food web. | closed choice | grade3 | natural science | biology | Ecosystems | Interpret food webs | A food web is a model.
Models can make things in nature easier to understand. Models can be simpler than the things they represent. A food web is a model that shows where living things in an ecosystem get their food. If a food web showed every living thing in an ecosystem, the food web would be hard to understand. So, ... | Consumers eat other living things. So, there are arrows in a food web that point from other living things to consumers.
The plainfin midshipman has arrows pointing to it from the phytoplankton and the zooplankton. So, the plainfin midshipman is a consumer.
The kelp does not have any arrows pointing to it. So, the kelp ... |
train/314 | Which country is highlighted? | [
"Tuvalu",
"Palau",
"the Federated States of Micronesia",
"Australia"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Palau. | ||
train/315 | Which country is highlighted? | [
"Vanuatu",
"Tonga",
"Fiji",
"Solomon Islands"
] | 2 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Fiji. | ||
train/316 | What is the direction of this pull? | [
"toward the giraffe",
"away from the giraffe"
] | 0 | A hungry giraffe pulls a leaf into her mouth. | closed choice | grade2 | natural science | physics | Force and motion | Identify pushes and pulls | One object can make another object move with a push or a pull.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The hungry giraffe pulls a leaf toward herself. She's ready to eat! The direction of the pull is toward the giraffe. |
train/317 | Which country is highlighted? | [
"Tuvalu",
"the Federated States of Micronesia",
"Palau",
"Fiji"
] | 2 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Palau. | ||
train/318 | What is the capital of Hawaii? | [
"Pierre",
"Hilo",
"Saint Louis",
"Honolulu"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Honolulu is the capital of Hawaii. | ||
train/319 | What is the capital of New York? | [
"Carson City",
"Albany",
"Annapolis",
"Augusta"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Albany is the capital of New York. | ||
train/320 | Identify the question that Kenji's experiment can best answer. | [
"Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?",
"Does temperature affect how much bacteria can grow in liquid?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Kenji mixed bacteria into a nutrient-rich liquid where the bacteria could grow. He poured four ounces of the mixture into each of ten glass flasks. In five of the ten flasks, he also added one teaspoon of cinnamon. He a... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/321 | Which better describes the Kibale National Forest ecosystem? | [
"It has year-round warm temperatures. It also has soil that is poor in nutrients.",
"It has soil that is poor in nutrients. It also has only a few types of organisms."
] | 0 | Figure: Kibale National Forest.
Kibale National Forest is a tropical rain forest ecosystem in Uganda, a country in eastern Africa. | 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 tropical rain forest is a type of ecosystem. Tropical rain forests have the following features: year-round rain and warm temperatures, soil that is poor in nutrients, and many different types of organisms. So, Kibale National Forest has year-round warm temperatures. It also has soil that is poor in nutrients. |
train/322 | What is the name of the colony shown? | [
"New York",
"Vermont",
"Michigan",
"Indiana"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is New York.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | ||
train/323 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 1.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker 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 | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 2 are farther apart than the magnets in Pair 1. So, the magnetic force is weaker in Pair 2 than in Pair 1. |
train/324 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade5 | natural science | physics | Magnets | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magni... |
train/325 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | 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.
Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magni... |
train/326 | What is the capital of Colorado? | [
"Denver",
"Salem",
"Olympia",
"Charleston"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/327 | What does pollen help a plant do? | [
"grow bigger",
"make seeds",
"grow new leaves"
] | 1 | The male part of a flower makes pollen. | closed choice | grade4 | natural science | biology | Plants | Describe and construct flowering plant life cycles | Many plants have flowers. These plants can use their flowers to reproduce, or make new plants like themselves. How do plants use their flowers to reproduce?
First, the male part of the flower makes pollen, and the female part makes eggs. Animals, wind, or water can move pollen. Pollination is what happens when pollen i... | Pollen helps the flower make seeds. After pollination, sperm cells from the pollen can combine with the eggs. These fertilized eggs can grow into seeds.
Pollen does not help a plant grow bigger or grow leaves. |
train/328 | Which solution has a higher concentration of blue particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each blue ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/329 | Look at the models of molecules below. Select the elementary substance. | [
"fluoromethanol",
"bromine",
"cyclopropane"
] | 1 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/330 | What is the capital of Delaware? | [
"Trenton",
"Raleigh",
"Wilmington",
"Dover"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/331 | Which trait did Stenophlebia have? Select the trait you can observe on the fossil. | [
"a long, thin body",
"thin legs"
] | 0 | This picture shows a fossil of an ancient insect called Stenophlebia.
Fossils of Stenophlebia have been found in rocks that are more than 140,000,000 years old. | closed choice | grade3 | natural science | earth-science | Fossils | Compare fossils to modern organisms | The way an organism looks or acts is called a trait. Scientists use fossils to learn more about the traits of ancient organisms.
Fossils can preserve the remains of body parts and activities. A fossil of a body part, such as a tail or a wing, can tell you what an organism looked like. A fossil of an organism's activiti... | |
train/332 | What is the capital of Rhode Island? | [
"Providence",
"Albany",
"Newport",
"Augusta"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Providence is the capital of Rhode Island. | ||
train/333 | What is the name of the colony shown? | [
"Georgia",
"Alabama",
"Virginia",
"Michigan"
] | 0 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Georgia. | ||
train/334 | Which material is this sandwich bag made of? | [
"plastic",
"cotton"
] | 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 sandwich bag.
The bag is made of plastic. | |
train/335 | Which area voted for Lincoln? | [
"the Northeast",
"the South"
] | 0 | In the 1860 election, the Republican party nominated Abraham Lincoln for president. Meanwhile, the Democrats could not decide on one candidate. Look at the 1860 election map. Then answer the question below. | closed choice | grade4 | social science | us-history | The Civil War and Reconstruction | The Civil War: the beginning of the war | ||
train/336 | Which solution has a higher concentration of purple particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 0 | The diagram below is a model of two solutions. Each purple 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 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/337 | Which solution has a higher concentration of yellow particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... |
train/338 | Which country is highlighted? | [
"Trinidad and Tobago",
"Barbados",
"Dominica",
"The Bahamas"
] | 3 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is The Bahamas. | ||
train/339 | Which of these cities is marked on the map? | [
"Atlanta",
"Houston",
"New Orleans",
"Memphis"
] | 3 | closed choice | grade4 | social science | geography | Cities | Cities of the Southeast | The city is Memphis, Tennessee. New Orleans, Houston, and Atlanta are marked with gray circles on the map below. | ||
train/340 | Which country is highlighted? | [
"Cuba",
"Haiti",
"Jamaica",
"Trinidad and Tobago"
] | 2 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Jamaica. | ||
train/341 | Which animal is also adapted for flight? | [
"Cape vulture",
"African wild dog"
] | 0 | Flamingos fly long distances every year in search of food and places to nest. They have wings instead of arms. Flamingos are adapted for flight.
Figure: flamingo. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the flamingo.
The flamingo has large, powerful wings. It is adapted for flight. Long, powerful wings help the flamingo travel long distances by air.
Now look at each animal. Figure out which animal has a similar adaptation.
The Cape vulture has large, powerful wings. It is adapted for flight.
The... |
train/342 | 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."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 1 are closer together than the magnets in Pair 2. So, the magnetic force is stronger in Pair 1 than in Pair 2. |
train/343 | Which of these states is farthest west? | [
"Nevada",
"North Dakota",
"Wisconsin",
"Maine"
] | 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 west arrow is pointing. Nevada is farthest west. | |
train/344 | What is the name of the colony shown? | [
"Massachusetts",
"South Carolina",
"Mississippi",
"New Hampshire"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North 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/345 | What is the capital of Ohio? | [
"Cincinnati",
"Lincoln",
"Cleveland",
"Columbus"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Columbus is the capital of Ohio. | ||
train/346 | Identify the question that Devon and Jason's experiment can best answer. | [
"Does Devon's snowboard slide down a hill in less time when it has a layer of wax or when it does not have a layer of wax?",
"Does Devon's snowboard slide down a hill in less time when it has a thin layer of wax or a thick layer of wax?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Devon applied a thin layer of wax to the underside of her snowboard and rode the board straight down a hill. Then, she removed the wax and rode the snowboard straight down the hill again. She repeated the rides four mor... | 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/347 | During this time, thermal energy was transferred from () to (). | [
"each battery . . . the surroundings",
"the surroundings . . . each battery"
] | 0 | Two friends bought phones that cost different amounts but had identical batteries. After using the phones for a while, both friends had to turn them off to let the batteries cool. This table shows how the temperature of each battery changed over 5minutes. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each battery decreased, which means that the thermal energy of each battery decreased. So, thermal energy was transferred from each battery to the surroundings. |
train/348 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sample B mus... |
train/349 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 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 | 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,... | Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are the same as in Pair 2. The distance between the magnets is also the same.
So, the magnitude of the magnetic force is the same in both pairs. |
train/350 | Which statement describes the Great Victoria Desert ecosystem? | [
"It has a small amount of rain.",
"It has warm, wet summers."
] | 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 | grade8 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A 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 ma... |
train/351 | Which of these states is farthest south? | [
"South Carolina",
"Delaware",
"Ohio",
"Kansas"
] | 0 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. South Carolina is farthest south. | |
train/352 | Is trachyte a mineral? | [
"no",
"yes"
] | 0 | Trachyte has the following properties:
found in nature
solid
not a pure substance
no fixed crystal structure
not made by organisms | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Trachyte does not have all the properties of a mineral. So, trachyte is not a mineral. |
train/353 | Which country is highlighted? | [
"Antigua and Barbuda",
"Saint Vincent and the Grenadines",
"Saint Lucia",
"Barbados"
] | 3 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Barbados. | ||
train/354 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 north pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/355 | What is the capital of Maryland? | [
"Annapolis",
"Baltimore",
"Burlington",
"Hartford"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | ||
train/356 | Which specific humidity level was measured within the outlined area shown? | [
"19 grams of water vapor per kilogram of air",
"12 grams of water vapor per kilogram of air",
"11 grams of water vapor per kilogram of air"
] | 0 | The map below shows humidity in the lower atmosphere on August 1, 2016. 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 South America on that day.
Look at the map. Then, answer the question below.
Data source: United ... | closed choice | grade7 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show specific humidity, a measurement of the amount of water vapor in the air.
The map's legend tells you the specific humidity level that each color represents. Colors on the left in th... | Look at the colors shown within the outlined area. Then, use the legend to determine which specific humidity levels those colors represent.
The legend tells you that this air mass contained air with specific humidity levels between 18 and 24 grams of water vapor per kilogram of air.
19 grams of water vapor per kilogram... |
train/357 | Which rhetorical appeal is primarily used in this ad? | [
"logos (reason)",
"ethos (character)",
"pathos (emotion)"
] | 2 | closed choice | grade12 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals.
Appeals to ethos, or character, show the writer or speaker as trustworthy, authoritative, or sharing important values with the audience. An ad that appe... | The ad appeals to pathos, or emotion, by associating the clothing line with fun and adventure. | |
train/358 | 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"
] | 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 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/359 | Select the organism in the same genus as the cocoi heron. | [
"Ardea purpurea",
"Strix varia",
"Tigrisoma mexicanum"
] | 0 | This organism is a cocoi heron. Its scientific name is Ardea cocoi. | closed choice | grade5 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A cocoi heron's scientific name is Ardea cocoi. The first word of its scientific name is Ardea.
Ardea purpurea is in the genus Ardea. The first word of its scientific name is Ardea. So, Ardea purpurea and Ardea cocoi are in the same genus.
Strix varia is in the genus Strix. The first word of its scientific name is Stri... |
train/360 | What is the capital of South Carolina? | [
"Lincoln",
"Atlanta",
"Columbia",
"Charleston"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Columbia is the capital of South Carolina. | ||
train/361 | Which of these states is farthest west? | [
"Mississippi",
"Michigan",
"Rhode Island",
"Utah"
] | 3 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Utah is farthest west. | |
train/362 | Which is this organism's scientific name? | [
"Asian tiger mosquito",
"Aedes albopictus"
] | 1 | This organism is Aedes albopictus. It is also called an Asian tiger mosquito. | closed choice | grade6 | 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,... | Aedes albopictus is written in italics. The first word is capitalized, and the second word is not.
So, Aedes albopictus is the scientific name. |
train/363 | 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"
] | 0 | The diagram below shows a solution with one solute. Each solute particle is represented by a purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there was 1 solute particle on the left side of the membrane and 5 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there w... |
train/364 | Which of these continents does the prime meridian intersect? | [
"Antarctica",
"Australia",
"South America"
] | 0 | closed choice | grade5 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects Antarctica. It does not intersect Australia or South America. | |
train/365 | 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... | Each particle in sample A has more mass than each particle in sample B. The particles in sample A also have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average ... |
train/366 | 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 the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | 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.
Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni... |
train/367 | Which solution has a higher concentration of purple particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 0 | The diagram below is a model of two solutions. Each purple 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 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/368 | Which material is these jeans made of? | [
"wood",
"cotton"
] | 1 | 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 jeans.
The jeans are made of two different materials. The buttons and zipper of the jeans are made of metal. The rest of the jeans are made of cotton.
Jeans are made of a type of cotton fabric called denim. Denim is a fabric woven in a special way. | |
train/369 | Is the following statement about our solar system true or false?
Earth is the largest planet that is made mainly of rock. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | The table tells you that Mercury, Venus, Earth, and Mars are the planets made mainly of rock. Of these planets, Earth has the volume with the largest exponent. So, Earth is the largest planet that is made mainly of rock. |
train/370 | Which of these states is farthest south? | [
"Minnesota",
"Michigan",
"Arizona",
"Illinois"
] | 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 south arrow is pointing. Arizona is farthest south. | |
train/371 | Is the following statement about our solar system true or false?
Saturn's volume is more than 10,000 times as large as Mercury's. | [
"false",
"true"
] | 1 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of 10,000 times the volume of Mercury.
Then compare the result to the volume of Saturn. The volume of Saturn is 8.27 x 10^14 km^3, which is more than 6.08 x 10^14 km^3. So, Saturn's volume is more than 10,000 times as large as Mercury's volume. |
train/372 | What is the name of the colony shown? | [
"New Hampshire",
"New York",
"New Jersey",
"Mississippi"
] | 2 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Jersey. | ||
train/373 | Identify the question that Cara's experiment can best answer. | [
"Does the amount of water in a glass affect whether eggs sink or float in the water?",
"Are eggs more likely to float in fresh water or salty water?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Cara poured four ounces of water into each of six glasses. Cara dissolved one tablespoon of salt in each of three glasses, and did not add salt to the other three. Then, Cara placed an egg in one glass and observed if t... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/374 | What is the capital of Wyoming? | [
"Portland",
"Cheyenne",
"Santa Fe",
"Salem"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | ||
train/375 | What is the direction of this pull? | [
"away from the fishing pole",
"toward the fishing pole"
] | 1 | A boy catches a fish. He uses his fishing pole to pull the fish out of the water. | closed choice | grade2 | natural science | physics | Force and motion | Identify pushes and pulls | One object can make another object move with a push or a pull.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The boy pulls the fish on the line toward his fishing pole to get the fish out of the water. The direction of the pull is toward the fishing pole. |
train/376 | Select the organism in the same species as the bobcat. | [
"Lynx rufus",
"Felis chaus",
"Lynx pardinus"
] | 0 | This organism is a bobcat. Its scientific name is Lynx rufus. | 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 bobcat's scientific name is Lynx rufus.
Lynx rufus has the same scientific name as a bobcat. So, these organisms are in the same species.
Felis chaus does not have the same scientific name as a bobcat. So, Lynx rufus and Felis chaus are not in the same species.
Lynx rufus is in the same genus as Lynx pardinus, but th... |
train/377 | What evidence of a volcanic eruption does this picture show? | [
"There is red melted rock flowing down the cliff.",
"The sky is partly cloudy."
] | 0 | 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/378 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sample B mus... |
train/379 | Which of these organisms contains matter that was once part of the phytoplankton? | [
"sea otter",
"kelp bass",
"kelp"
] | 1 | Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | 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 that starts from the phytoplankton.There are four paths matter can take from the phytoplankton to the kelp bass: phytoplankton->zooplankton->kelp bass. phytoplankton->zooplankton->plainfin midshipman->k... |
train/380 | Which property do these four objects have in common? | [
"sweet",
"fragile",
"salty"
] | 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 fragile object will break into pieces if you drop it. All four objects are fragile.
Sugar has a sweet taste. The ceramic mug, the glass bowl, and the icicle are not sweet.
Potato chips have a salty taste. The ceramic mug and the glass bowl are not ... |
train/381 | Which of the following organisms is the omnivore in this food web? | [
"rotifer",
"golden algae",
"green algae"
] | 0 | Below is a food web from Little Rock Lake, a freshwater lake ecosystem in Wisconsin.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade5 | natural science | biology | Ecosystems | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | 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 golden algae does not have any arrows pointing to it. So, the golden algae is not an omnivore.
The copepod has an arrow pointing to it from the golden ... |
train/382 | Which country is highlighted? | [
"Fiji",
"Tuvalu",
"Tonga",
"Papua New Guinea"
] | 0 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Fiji. | ||
train/383 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The 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/384 | Which of these states is farthest south? | [
"Wisconsin",
"North Dakota",
"Arizona",
"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 south arrow is pointing. Arizona is farthest south. | |
train/385 | What is the name of the colony shown? | [
"Iowa",
"Delaware",
"New Jersey",
"New York"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/386 | During this time, thermal energy was transferred from () to (). | [
"each cake . . . the surroundings",
"the surroundings . . . each cake"
] | 0 | Brandon baked two identical cakes. When he took them out of the oven, he left one cake in its pan and took the other cake out of its pan to put it on a plate. This table shows how the temperature of each cake changed over 5minutes. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each cake decreased, which means that the thermal energy of each cake decreased. So, thermal energy was transferred from each cake to the surroundings. |
train/387 | 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 the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | 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,... | Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are the same as in Pair 2. The distance between the magnets is also the same.
So, the magnitude of the magnetic force is the same in both pairs. |
train/388 | 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"
] | 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 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/389 | What is the capital of Georgia? | [
"Boise",
"Oklahoma City",
"Atlanta",
"Savannah"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Atlanta is the capital of Georgia. | ||
train/390 | Which solution has a higher concentration of yellow particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 0 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... |
train/391 | What is the capital of Idaho? | [
"Newark",
"Lansing",
"Boise",
"Missoula"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/392 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/393 | Identify the question that Kendrick's experiment can best answer. | [
"Does temperature affect how much bacteria can grow in liquid?",
"Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Kendrick mixed bacteria into a nutrient-rich liquid where the bacteria could grow. He poured four ounces of the mixture into each of ten glass flasks. In five of the ten flasks, he also added one teaspoon of cinnamon. H... | 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/394 | Which ocean is highlighted? | [
"the Pacific Ocean",
"the Arctic Ocean",
"the Southern Ocean",
"the Atlantic Ocean"
] | 0 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Pacific Ocean. | |
train/395 | Which property do these four objects have in common? | [
"slippery",
"soft",
"flexible"
] | 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.
A slippery object is hard to hold onto or stand on. All four objects are slippery.
A flexible object can be folded or bent without breaking easily. The wet ice cube is not flexible.
A soft object changes shape when pressed or squeezed. The wet ice cu... |
train/396 | Which animal is also adapted to be camouflaged in the snow? | [
"Arctic hare",
"lion"
] | 0 | Ptarmigans live in cold, snowy places. The is adapted to be camouflaged in the snow.
Figure: ptarmigan. | 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 ptarmigan.
During the winter, the ptarmigan has white feathers covering its body. It is adapted to be camouflaged in the snow. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
During the winter, the Arctic hare has white fur cov... |
train/397 | What can Jenny and Olivia trade to each get what they want? | [
"Jenny can trade her tomatoes for Olivia's broccoli.",
"Olivia can trade her broccoli for Jenny's oranges.",
"Jenny can trade her tomatoes for Olivia's sandwich.",
"Olivia can trade her almonds for Jenny'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.
Jenny and Olivia open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Jenny wanted b... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Jenny wanted broccoli in her lunch and Olivia was hoping for tomatoes. Look at the labeled part of the images.
Jenny has tomatoes. Olivia 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/398 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"neither; the samples have the same temperature",
"sample A"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | 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/399 | What is the capital of Oregon? | [
"Salem",
"Olympia",
"Portland",
"Carson City"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. |
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