Split (3)

train · 12.4k rows

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train/500	Select the mammal below.	[ "green tree frog", "cassowary", "Canadian lynx", "barn owl" ]	2	Mammals have hair or fur and feed their young milk. Mammals are warm-blooded. Warm-blooded animals can control their body temperature. A giraffe is an example of a mammal.	closed choice	grade4	natural science	biology	Classification	Identify mammals, birds, fish, reptiles, and amphibians	Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification. Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals.	A barn owl is a bird. It has feathers, two wings, and a beak. Barn owls live on every continent except Antarctica. A cassowary is a bird. It has feathers, two wings, and a beak. Cassowaries have wings, but they cannot fly! They can run very fast. A Canadian lynx is a mammal. It has fur and feeds its young milk. Canadia...
train/501	What is the name of the colony shown?	[ "Pennsylvania", "New Jersey", "New York", "New Hampshire" ]	0		closed choice	grade4	social science	us-history	English colonies in North America	Identify the Thirteen Colonies		The colony is Pennsylvania.
train/502	Which country is highlighted?	[ "Nauru", "Vanuatu", "Kiribati", "Fiji" ]	1		closed choice	grade6	social science	geography	Oceania: geography	Identify and select countries of Oceania		This country is Vanuatu. Does Vanuatu have any territorial disputes? Vanuatu claims to own Matthew and Hunter Islands, which are disputed islands. In other words, multiple countries or groups claim that the islands rightfully belong to them. France has controlled the islands since 1929. But shortly after gaining indepe...
train/503	What can Carrie and Matt trade to each get what they want?	[ "Carrie can trade her tomatoes for Matt's broccoli.", "Matt can trade his almonds for Carrie's tomatoes.", "Carrie can trade her tomatoes for Matt's carrots.", "Matt can trade his broccoli for Carrie's oranges." ]	0	Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another. Carrie and Matt open their lunch boxes in the school cafeteria. Neither Carrie nor Matt 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. Carrie wants broccoli. Matt 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/504	What is the capital of Michigan?	[ "Lansing", "Grand Rapids", "Lincoln", "Topeka" ]	0		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Midwest		Lansing is the capital of Michigan.
train/505	Which animal's feet are also adapted for digging?	[ "Malagasy giant chameleon", "meerkat" ]	1	Star-nosed moles are found in many parts of North America. They live in burrows. The moles eat earthworms and nuts, which they find in the soil. The feet of the are adapted for digging. Figure: star-nosed mole.	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 star-nosed mole. The star-nosed mole has long, straight claws. Its feet are adapted for digging. The star-nosed mole uses its claws to break up soil and move it out of the way. Now look at each animal. Figure out which animal has a similar adaptation. The meerkat has long, straight claws. Its...
train/506	Select the organism in the same genus as the Burmese python.	[ "Taricha granulosa", "Melanoplus bivittatus", "Python bivittatus" ]	2	This organism is a Burmese python. Its scientific name is Python bivittatus.	closed choice	grade8	natural science	biology	Classification and scientific names	Use scientific names to classify organisms	Scientists use scientific names to identify organisms. Scientific names are made of two words. The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits. A genus is made up of one or more species. A species is a group of very similar organisms...	A Burmese python's scientific name is Python bivittatus. The first word of its scientific name is Python. Taricha granulosa is in the genus Taricha. The first word of its scientific name is Taricha. So, Taricha granulosa and Python bivittatus are not in the same genus. Melanoplus bivittatus and Python bivittatus are no...
train/507	Identify the question that Emily and Herman's experiment can best answer.	[ "Does Emily's snowboard slide down a hill in less time when it has a thin layer of wax or a thick layer of wax?", "Does Emily'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?" ]	1	The passage below describes an experiment. Read the passage and then follow the instructions below. Emily 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/508	Select the bird below.	[ "zebra", "ostrich" ]	1	Birds have feathers, two wings, and a beak. A painted stork is an example of a bird.	closed choice	grade3	natural science	biology	Classification	Identify mammals, birds, fish, reptiles, and amphibians	Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common. Scientists sort animals into groups based on traits they have in common. This process is called classification.	A zebra is a mammal. It has hair and feeds its young milk. Zebras eat mostly grass. But they sometimes eat other types of plants, such as shrubs or tree bark. An ostrich is a bird. It has feathers, two wings, and a beak. The ostrich is the largest bird alive today. Ostriches cannot fly, but they can run very fast.
train/509	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." ]	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	grade6	natural science	physics	Velocity, acceleration, and forces	Compare magnitudes of magnetic forces	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,...	The magnets in Pair 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/510	What is the capital of Alaska?	[ "Phoenix", "Juneau", "Annapolis", "Anchorage" ]	1		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the West		Juneau is the capital of Alaska.
train/511	Which property do these four objects have in common?	[ "hard", "rough", "salty" ]	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. Potato chips have a salty taste. All four objects are salty. A rough object feels scratchy when you touch it. The potato chips and the cracker are rough, but the ocean water is not. A hard object does not change shape when pressed or squeezed. The pr...
train/512	What can Nathan and Xavier trade to each get what they want?	[ "Xavier can trade his almonds for Nathan's tomatoes.", "Nathan can trade his tomatoes for Xavier's broccoli.", "Nathan can trade his tomatoes for Xavier's sandwich.", "Xavier can trade his broccoli for Nathan's oranges." ]	1	Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another. Nathan and Xavier open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Nathan wanted...	closed choice	grade6	social science	economics	Basic economic principles	Trade and specialization		Nathan wanted broccoli in his lunch and Xavier was hoping for tomatoes. Look at the labeled part of the images. Nathan has tomatoes. Xavier 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/513	What is the capital of Maine?	[ "Des Moines", "Augusta", "Topeka", "Portland" ]	1		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Northeast		Augusta is the capital of Maine.
train/514	What is the expected ratio of offspring with mostly plain scales to offspring with mostly iridescent scales? Choose the most likely ratio.	[ "4:0", "0:4", "2:2", "1:3", "3:1" ]	3	This passage describes the iridescent scales trait in bettas: A betta, or Siamese fighting fish, is a popular aquarium pet. Many bettas have shiny iridescent scales, which contain tiny crystals that reflect light. These crystals cause the fish's color to look slightly different when seen from different angles. Some bet...	closed choice	grade8	natural science	biology	Genes to traits	Use Punnett squares to calculate ratios of offspring types	Offspring phenotypes: dominant or recessive? How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a...	To determine how many boxes in the Punnett square represent offspring with mostly plain scales or mostly iridescent scales, consider whether each phenotype is the dominant or recessive allele's version of the iridescent scales trait. The question tells you that the I allele, which is for mostly iridescent scales, is do...
train/515	Is a tooth a solid, a liquid, or a gas?	[ "a solid", "a liquid", "a gas" ]	0		closed choice	grade4	natural science	physics	States of matter	Identify and sort solids, liquids, and gases	Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms. When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own. Some solids can be easily folded, bent, or broken. A piece of paper is a...	A tooth is a solid. A solid has a size and shape of its own. A tooth may chip or break, but it still has a size and shape of its own.
train/516	Which of the following organisms is the decomposer in this food web?	[ "gray fox", "black bear", "swallowtail caterpillar", "bolete fungus" ]	3	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...	Decomposers help break down dead organisms into simpler matter, such as nutrients. These nutrients can then help plants and other organisms grow. In a food web, there is an arrow pointing from another organism to a decomposer. There are no arrows pointing from a decomposer to another organism. The black bear has an arr...
train/517	Which of the following could Leroy's test show?	[ "how long it would take the sample fabric to dry after it absorbed one drop of water", "if the sample fabric would absorb one drop of water in less than one second", "how much athletes would sweat in the fabric" ]	0	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques...	closed choice	grade8	natural science	science-and-engineering-practices	Engineering practices	Evaluate tests of engineering-design solutions	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured. Imagine an engineer needs to design a...
train/518	Which of these cities is marked on the map?	[ "New York City", "Pittsburgh", "Baltimore", "Philadelphia" ]	3		closed choice	grade4	social science	geography	Cities	Cities of the Northeast		The city is Philadelphia, Pennsylvania. New York City, Baltimore, and Pittsburgh are marked with gray circles on the map below.
train/519	Look at the models of molecules below. Select the elementary substance.	[ "silane", "chloroform", "oxygen" ]	2		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/520	Which of these states is farthest south?	[ "Louisiana", "Michigan", "Iowa", "Kentucky" ]	0		closed choice	grade4	social science	geography	Maps	Read a map: cardinal directions	Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west. A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction. The north arrow points to the North Pole. On most maps, north...	To find the answer, look at the compass rose. Look at which way the south arrow is pointing. Louisiana is farthest south.
train/521	What is the capital of New Mexico?	[ "Albuquerque", "Santa Fe", "Honolulu", "Sacramento" ]	1		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the West		Santa Fe is the capital of New Mexico.
train/522	Which continent is highlighted?	[ "Europe", "South America", "Africa", "Asia" ]	1		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 South America.
train/523	Which of the following organisms is the producer in this food web?	[ "orca", "bat star", "zooplankton", "kelp" ]	3	Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California. A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem.	closed choice	grade8	natural science	biology	Ecological interactions	Interpret food webs I	A food web is a model. A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho...	Producers do not eat other organisms. So, in a food web, producers do not have arrows pointing to them from other organisms. The phytoplankton does not have any arrows pointing to it. So, the phytoplankton is a producer. The bat star has an arrow pointing to it, so it is not a producer. The orca has an arrow pointing t...
train/524	Look at the picture. Which word best describes how these shoes smell?	[ "flowery", "fresh", "stinky" ]	2		closed choice	grade2	language science	writing-strategies	Descriptive details	Choose the sensory details that match the picture	When you write, you can use sensory details. These sense words help your reader understand what something looks, sounds, tastes, smells, or feels like. Sensory Category \| Description Sight \| These are words like bright, clean, and purple. A reader can imagine looking at these details. Sound \| These are words like hissi...	Look at the picture. The word stinky describes how these shoes smell. You can tell by looking at the boy's face. Flowery and fresh can also describe how something smells. But they do not describe these shoes.
train/525	What is the capital of South Carolina?	[ "Charleston", "Madison", "Jackson", "Columbia" ]	3		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the Southeast		Columbia is the capital of South Carolina.
train/526	Which better describes the Sahara Desert ecosystem?	[ "It has a small amount of rain. It also has many different types of organisms.", "It has mostly small plants. It also has only a few types of organisms." ]	0	Figure: Sahara Desert. The Sahara Desert is a hot desert ecosystem in northern 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 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 Sahara Desert has a small amount of rain. It also has many different types of organisms.
train/527	Which three months have an average precipitation of around 3.5inches in Seattle?	[ "February, March, and October", "June, July, and December", "April, May, and November" ]	0	Use the graph to answer the question below.	closed choice	grade3	natural science	earth-science	Weather and climate	Use climate data to make predictions	Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data. A bar graph can be used to show the average amount of precipitation each month. Months with taller bars have more precipitation on average.	To describe the average precipitation trends in Seattle, look at the graph. Choice "Feb" is incorrect. Choice "Mar" is incorrect. Choice "Apr" is incorrect. Choice "May" is incorrect. Choice "Jun" is incorrect. Choice "Jul" is incorrect. Choice "Oct" is incorrect. Choice "Nov" is incorrect. Choice "Dec" is incorrect. C...
train/528	Which fish's mouth is also adapted for tearing through meat?	[ "parrotfish", "starry moray" ]	1	Bull sharks eat turtles, birds, dolphins, and other fish. The mouth of the is adapted to tear through meat. Figure: bull shark.	closed choice	grade3	natural science	biology	Adaptations	Animal adaptations: beaks, mouths, and necks	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. The shape of 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 bull shark. The bull shark has a large mouth and sharp teeth. Its mouth is adapted for tearing through meat. The bull shark uses its teeth to cut up meat into pieces it can swallow. Now look at each animal. Figure out which animal has a similar adaptation. The starry moray has a large mouth a...
train/529	Which continent is highlighted?	[ "Australia", "Asia", "Africa", "Antarctica" ]	3		closed choice	grade5	social science	geography	Oceans and continents	Identify oceans and continents	A continent is one of the major land masses on the earth. Most people say there are seven continents.	This continent is Antarctica.
train/530	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 2.", "The magnetic force is weaker in Pair 1.", "The strength of the magnetic force is the same in both pairs." ]	0	The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material.	closed choice	grade3	natural science	physics	Magnets	Compare strengths of magnetic forces	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other. You c...	Distance affects the strength of the magnetic force. When magnets are 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/531	What is the name of the colony shown?	[ "New York", "Iowa", "New Jersey", "Connecticut" ]	2		closed choice	grade5	social science	us-history	English colonies in North America	Identify the Thirteen Colonies		The colony is New Jersey.
train/532	What is the name of the colony shown?	[ "North Carolina", "Mississippi", "Florida", "South Carolina" ]	0		closed choice	grade5	social science	us-history	English colonies in North America	Identify the Thirteen Colonies		The colony is North Carolina.
train/533	What is the name of the colony shown?	[ "Michigan", "Rhode Island", "West Virginia", "Connecticut" ]	1		closed choice	grade5	social science	us-history	English colonies in North America	Identify the Thirteen Colonies		The colony is Rhode Island.
train/534	What is the capital of Alaska?	[ "Carson City", "Juneau", "Sacramento", "Providence" ]	1		closed choice	grade4	social science	geography	State capitals	Identify the 50 state capitals		Juneau is the capital of Alaska.
train/535	Based on the arrows, which of the following living things is a consumer?	[ "phytoplankton", "bat star" ]	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 bat star has an arrow pointing to it from the kelp bass. So, the bat star is a consumer. The phytoplankton does not have any arrows pointing to it. So, the phytoplankton is a producer, not a consu...
train/536	What is the capital of California?	[ "Sacramento", "Nampa", "Salem", "Phoenix" ]	0		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the West		Sacramento is the capital of California.
train/537	What is the name of the colony shown?	[ "Virginia", "New York", "Vermont", "Pennsylvania" ]	1		closed choice	grade7	social science	us-history	Colonial America	Identify the Thirteen Colonies		The colony is New York. During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony.
train/538	Select the reptile below.	[ "porcupinefish", "anchovy", "fire salamander", "cobra" ]	3	Reptiles have scaly, waterproof skin. Most reptiles live on land. Reptiles are cold-blooded. The body temperature of cold-blooded animals depends on their environment. A Chinese alligator is an example of a reptile.	closed choice	grade4	natural science	biology	Classification	Identify mammals, birds, fish, reptiles, and amphibians	Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification. Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals.	A fire salamander is an amphibian. It has moist skin and begins its life in water. Fire salamanders can release poison from their skin. This poison helps protect them from predators. A cobra is a reptile. It has scaly, waterproof skin. Most cobras have a wide, flat hood below their head. A cobra can display its hood to...
train/539	Which of the following statements is true?	[ "Each bryum moss cell is so small that it can be seen only with the help of a microscope.", "The organism shown in the micrograph is made up of cells, but the organism in the photograph is not.", "Each bryum moss cell is over 0.37 millimeters long." ]	0	Look at the images and read the text. Then, answer the question. Figure 1: a photograph of bryum moss. This image is a photograph of a plant called bryum moss. The photograph was taken with an ordinary camera. It shows what you would see if you looked at bryum moss closely. Figure 2: a micrograph of bryum moss. This ...	closed choice	grade6	natural science	biology	Cells	Understanding cells
train/540	Which of these states is farthest west?	[ "Vermont", "Ohio", "Washington", "Virginia" ]	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. Washington is farthest west.
train/541	Which of these states is farthest east?	[ "Washington", "Montana", "Utah", "Tennessee" ]	3		closed choice	grade5	social science	geography	Maps	Read a map: cardinal directions	Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west. A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction. The north arrow points to the North Pole. On most maps, north...	To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Tennessee is farthest east.
train/542	Which solution has a higher concentration of yellow particles?	[ "Solution B", "Solution A", "neither; their concentrations are the same" ]	2	The diagram below is a model of two solutions. Each yellow ball represents one particle of solute.	closed choice	grade6	natural science	chemistry	Solutions	Compare concentrations of solutions	A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution...	In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container. Use the concentration formula to find the number of yellow particles per mill...
train/543	What is the capital of Arkansas?	[ "Fayetteville", "Little Rock", "Provo", "Portland" ]	1		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the Southeast		Little Rock is the capital of Arkansas.
train/544	In this experiment, which were part of a control group?	[ "the unpruned tomato plants", "the pruned tomato plants" ]	0	The passage below describes an experiment. Craig worked in a restaurant that had a vegetable garden. Part of his job was to care for the tomato plants. He had heard that pruning, or trimming, tomato plants can help tomatoes grow. He wondered if pruning would affect how well his tomato plants grew. Craig chose 24 tomat...	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, Craig investigated whether pruning tomato plants affects the weight of the tomatoes. The unpruned tomato plants were not pruned. So, they were part of a control group.
train/545	Which of the following could Mona and Bridget'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/546	Complete the text to describe the diagram. Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium.	[ "to the right than to the left", "to the left than to the right" ]	0	The diagram below shows a solution with one solute. Each solute particle is represented by a yellow ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles. The diagram shows how the solution can change over time...	closed choice	grade6	natural science	chemistry	Solutions	Diffusion across membranes	In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion. A...	Look at the diagram again. It shows you how the solution changed during the process of diffusion. Before the solute particles reached equilibrium, there were 4 solute particles on the left side of the membrane and 2 solute particles on the right side of the membrane. When the solute particles reached equilibrium, there...
train/547	Which property matches this object?	[ "sticky", "shiny" ]	1	Select the better answer.	closed choice	grade3	natural science	physics	Materials	Identify properties of an object	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.	Look at the object. Think about each property. A sticky object can attach or stick to other things. The crown is not sticky. A shiny object reflects a lot of light. You can usually see your reflection in a shiny object. The crown is shiny.
train/548	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." ]	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	grade5	natural science	physics	Magnets	Compare magnitudes of magnetic forces	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,...	The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force. Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are...
train/549	Which trait did Eryma have? Select the trait you can observe on the fossil.	[ "a round, flat body", "two claws" ]	1	This picture shows a fossil of an ancient animal called Eryma. Fossils of Eryma have been found in deposits of shale and limestone. Some Eryma fossils are more than 100,000,000 years old.	closed choice	grade4	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/550	During this time, thermal energy was transferred from () to ().	[ "each bottle . . . the surroundings", "the surroundings . . . each bottle" ]	1	Two bottles of soda were sitting on a porch on a hot day. The two bottles were identical, except that one bottle was made of brown glass and one bottle was made of clear glass. This table shows how the temperature of each bottle changed over 25minutes.	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 bottle increased, which means that the thermal energy of each bottle increased. So, thermal energy was transferred from the surroundings to each bottle.
train/551	Which animal is also adapted to be camouflaged among green leaves?	[ "common hawk-cuckoo", "emerald tree boa" ]	1	Green tree pythons live in the forests of Southeast Asia. The is adapted to be camouflaged among green leaves. Figure: green tree python.	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 green tree python. The green tree python has green scales covering its body. It is adapted to be camouflaged among green leaves. The word camouflage means to blend in. Now look at each animal. Figure out which animal has a similar adaptation. The emerald tree boa has bright green scales cover...
train/552	What is the capital of North Carolina?	[ "Charlotte", "Bismarck", "Pierre", "Raleigh" ]	3		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Southeast		Raleigh is the capital of North Carolina.
train/553	Select the organism in the same species as the pink skunk clownfish.	[ "Amphiprion perideraion", "Diodon hystrix", "Halichoeres hortulanus" ]	0	This organism is a pink skunk clownfish. Its scientific name is Amphiprion perideraion.	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 pink skunk clownfish's scientific name is Amphiprion perideraion. Halichoeres hortulanus does not have the same scientific name as a pink skunk clownfish. So, Amphiprion perideraion and Halichoeres hortulanus are not in the same species. Amphiprion perideraion has the same scientific name as a pink skunk clownfish. S...
train/554	What is the capital of Minnesota?	[ "Saint Paul", "Madison", "Indianapolis", "Minneapolis" ]	0		closed choice	grade5	social science	geography	State capitals	Identify state capitals of the Midwest		Saint Paul is the capital of Minnesota.
train/555	Select the organism in the same genus as the dromedary camel.	[ "Camelus dromedarius", "Equus grevyi", "Macropus giganteus" ]	0	This organism is a dromedary camel. Its scientific name is Camelus dromedarius.	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 dromedary camel's scientific name is Camelus dromedarius. The first word of its scientific name is Camelus. This organism and the dromedary camel are in the same genus and the same species! Both organisms have the same scientific name, Camelus dromedarius. Equus grevyi is in the genus Equus. The first word of its sci...
train/556	What is the capital of Ohio?	[ "Topeka", "Cincinnati", "Columbus", "Fayetteville" ]	2		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Midwest		Columbus is the capital of Ohio.
train/557	Think about the magnetic force between the magnets in each pair. Which of the following statements is true?	[ "The magnetic force is stronger in Pair 2.", "The magnetic force is stronger in Pair 1.", "The strength of the magnetic force is the same in both pairs." ]	0	The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material.	closed choice	grade3	natural science	physics	Magnets	Compare strengths of magnetic forces	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other. You c...	Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger. The magnets in Pair 2 are closer together than the magnets in Pair 1. So, the magnetic force is stronger in Pair 2 than in Pair 1.
train/558	Which animal is also adapted to be camouflaged in the snow?	[ "ptarmigan", "great horned owl" ]	0	Polar bears live in and around the cold Arctic Ocean. The is adapted to be camouflaged in the snow. Figure: polar bear.	closed choice	grade3	natural science	biology	Adaptations	Animal adaptations: skins and body coverings	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal...	Look at the picture of the polar bear. The polar bear has white fur 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 ptarmigan has white feathers covering its body. It ...
train/559	Which continent is highlighted?	[ "Asia", "South America", "Europe", "Antarctica" ]	1		closed choice	grade5	social science	geography	Oceans and continents	Identify oceans and continents	A continent is one of the major land masses on the earth. Most people say there are seven continents.	This continent is South America.
train/560	Which of these states is farthest east?	[ "Kansas", "California", "Montana", "New Mexico" ]	0		closed choice	grade4	social science	geography	Maps	Read a map: cardinal directions	Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west. A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction. The north arrow points to the North Pole. On most maps, north...	To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Kansas is farthest east.
train/561	Which part of the beet plant do we usually eat?	[ "the root", "the seeds", "the fruit" ]	0	People use beet plants for food. We usually eat the part of this plant that takes in water and nutrients. It holds the plant in place in the soil.	closed choice	grade4	natural science	biology	Plants	Classify fruits and vegetables as plant parts	The fruits and vegetables we eat are parts of plants! Plants are made up of different structures. The different structures carry out important functions. The roots take in water and nutrients from the soil. They also hold the plant in place in the soil. The stem supports the plant. It carries food, water, and nutrients...	The part of the beet plant we usually eat is the root. It takes in water and nutrients. It also holds the plant in place in the soil.
train/562	Which trait did Ursus spelaeus have? Select the trait you can observe on the fossil.	[ "rounded ears", "brown fur covering most of its body", "long legs" ]	2	This picture shows a fossil of an ancient animal called Ursus spelaeus. Ursus spelaeus went extinct about 24,000 years ago. Many Ursus spelaeus fossils have been found in caves.	closed choice	grade6	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/563	Which better describes the Gobi Desert ecosystem?	[ "It has heavy snow. It also has only a few types of trees.", "It has dry, thin soil. 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 dry, thin soil. It also has a small amount of rain or snow.
train/564	Identify the question that Nicole's experiment can best answer.	[ "Do the insides of white boxes get hotter than the insides of black boxes when the boxes are left in the sun?", "Do the temperatures inside boxes depend on the sizes of the boxes?" ]	0	The passage below describes an experiment. Read the passage and then follow the instructions below. Nicole glued lids onto 16 cardboard shoe boxes of equal size. She painted eight of the boxes black and eight of the boxes white. Nicole made a small hole in the side of each box and then stuck a thermometer partially in...	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/565	What is the capital of Illinois?	[ "Fayetteville", "Chicago", "Santa Fe", "Springfield" ]	3		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the Midwest		Springfield is the capital of Illinois.
train/566	What is the name of the colony shown?	[ "Maryland", "Georgia", "Virginia", "South Carolina" ]	3		closed choice	grade8	social science	us-history	Colonial America	Identify the Thirteen Colonies		The colony is South Carolina.
train/567	What is the capital of Washington?	[ "Orlando", "Olympia", "Denver", "Spokane" ]	1		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the West		Olympia is the capital of Washington.
train/568	Which solution has a higher concentration of pink particles?	[ "Solution B", "Solution A", "neither; their concentrations are the same" ]	1	The diagram below is a model of two solutions. Each pink ball represents one particle of solute.	closed choice	grade7	natural science	chemistry	Solutions	Compare concentrations of solutions	A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution...	In Solution A and Solution B, the pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container. Use the concentration formula to find the number of pink particles per milliliter. ...
train/569	Which letter shows the location of the South?	[ "B", "C", "A" ]	1	During the Civil War, the South tried to break away from the United States and start a new country called the Confederate States of America. After four years of bloody fighting, the United States defeated the Confederacy in 1865, ending the Civil War. The years following the war are referred to as the Reconstruction Er...	closed choice	grade7	social science	us-history	Reconstruction	The end of Reconstruction and the rise of Jim Crow		Look at the compass on the map. It tells you what part of the map is to the south. The compass shows that the bottom of the map is to the south. The region in that part of the United States is known as the South. The states in this region tried to break away from the United States during the Civil War.
train/570	Complete the statement. Magnesium oxide is ().	[ "an elementary substance", "a compound" ]	1	The model below represents magnesium oxide. Magnesium oxide is used to help purify water.	closed choice	grade7	natural science	chemistry	Atoms and molecules	Classify elementary substances and compounds using models	There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you. A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ...	Use the model to determine whether magnesium oxide is an elementary substance or a compound. Step 1: Interpret the model. . Use the legend to determine the chemical element represented by each color. The colors and atomic symbols from the legend are shown in the table below. The table also includes the names of the che...
train/571	Identify the question that Evan's experiment can best answer.	[ "Do steel nails rust in fewer days when submerged in a large volume of liquid compared to a small volume?", "Do steel nails take fewer days to rust in water compared to vinegar?" ]	1	The passage below describes an experiment. Read the passage and then follow the instructions below. Evan put one two-inch steel nail into each of six test tubes. He added water to three of the test tubes and vinegar to the other three. In each test tube, he completely covered the nail with the same volume of liquid. E...	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/572	Which property do these three objects have in common?	[ "sticky", "scratchy", "fuzzy" ]	1	Select the best answer.	closed choice	grade4	natural science	physics	Materials	Compare properties of objects	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects...	Look at each object. For each object, decide if it has that property. A sticky object can attach or stick to other things. The sandpaper is not sticky. A fuzzy object is covered in soft hair. The sandpaper is not fuzzy. A scratchy object is rough and itchy against your skin. All three objects are scratchy. The property...
train/573	What is the capital of Ohio?	[ "Columbus", "Houston", "Lincoln", "Carson City" ]	0		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the Midwest		Columbus is the capital of Ohio.
train/574	Select the organism in the same genus as the Victoria crowned pigeon.	[ "Alligator mississippiensis", "Goura scheepmakeri", "Aequorea victoria" ]	1	This organism is a Victoria crowned pigeon. Its scientific name is Goura victoria.	closed choice	grade8	natural science	biology	Classification and scientific names	Use scientific names to classify organisms	Scientists use scientific names to identify organisms. Scientific names are made of two words. The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits. A genus is made up of one or more species. A species is a group of very similar organisms...	A Victoria crowned pigeon's scientific name is Goura victoria. The first word of its scientific name is Goura. Aequorea victoria and Goura victoria are not in the same genus. These organisms are not in the same genus, but part of their scientific names is the same. Aequorea victoria and Goura victoria have the same spe...
train/575	Complete the statement. Hydrogen sulfide is ().	[ "a compound", "an elementary substance" ]	0	The model below represents a molecule of hydrogen sulfide. Hydrogen sulfide is a poisonous gas that is produced by some types of bacteria found in swamps and marshes.	closed choice	grade7	natural science	chemistry	Atoms and molecules	Classify elementary substances and compounds using models	There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you. A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ...	Use the model to determine whether hydrogen sulfide is an elementary substance or a compound. Step 1: Interpret the model. . Use the legend to determine the chemical element represented by each color. The colors and atomic symbols from the legend are shown in the table below. The table also includes the names of the ch...
train/576	Which property do these three objects have in common?	[ "smooth", "yellow", "translucent" ]	0	Select the best answer.	closed choice	grade4	natural science	physics	Materials	Compare properties of objects	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects...	Look at each object. For each object, decide if it has that property. A smooth object is not scratchy or rough. All three objects are smooth. A translucent object lets light through. But you cannot see clearly through a translucent object. The car bumper and the ceramic mug are not translucent. Yellow is a color. This ...
train/577	What can Chloe and Eddie trade to each get what they want?	[ "Chloe can trade her tomatoes for Eddie's sandwich.", "Chloe can trade her tomatoes for Eddie's broccoli.", "Eddie can trade his almonds for Chloe's tomatoes.", "Eddie can trade his broccoli for Chloe's oranges." ]	1	Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another. Chloe and Eddie open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Chloe wanted br...	closed choice	grade6	social science	economics	Basic economic principles	Trade and specialization		Chloe wanted broccoli in her lunch and Eddie was hoping for tomatoes. Look at the labeled part of the images. Chloe has tomatoes. Eddie 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/578	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.	closed choice	grade5	natural science	physics	Magnets	Compare magnitudes of magnetic forces	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,...	Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The 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/579	Based on the arrows, which of the following organisms is a decomposer?	[ "mushroom", "lichen" ]	0	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	grade4	natural science	biology	Ecosystems	Interpret food webs	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...	Decomposers help break down dead organisms into simpler matter, such as nutrients. These nutrients can then help plants and other organisms grow. In a food web, there is an arrow pointing from another organism to a decomposer. There are no arrows pointing from a decomposer to another organism. The lichen has arrows poi...
train/580	Which animal's feet are also adapted for grabbing prey?	[ "swamp harrier", "white rhinoceros" ]	0	Golden eagles eat fish, mammals, and other birds. The 's feet are adapted to grab prey. Figure: golden eagle.	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. 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 golden eagle. The golden eagle has long toes with sharp claws. Its feet are adapted for grabbing prey. The sharp claws can help the golden eagle attack and kill its prey. The long toes can help it hold on to its prey. Now look at each animal. Figure out which animal has a similar adaptation. ...
train/581	What is the capital of Wyoming?	[ "Tucson", "Juneau", "Honolulu", "Cheyenne" ]	3		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the West		Cheyenne is the capital of Wyoming.
train/582	What can Sam and Denise trade to each get what they want?	[ "Denise can trade her broccoli for Sam's oranges.", "Denise can trade her almonds for Sam's tomatoes.", "Sam can trade his tomatoes for Denise's sandwich.", "Sam can trade his tomatoes for Denise's broccoli." ]	3	Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another. Sam and Denise open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Sam wanted brocc...	closed choice	grade6	social science	economics	Basic economic principles	Trade and specialization		Sam wanted broccoli in his lunch and Denise was hoping for tomatoes. Look at the labeled part of the images. Sam has tomatoes. Denise 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/583	Select the organism in the same genus as the axolotl.	[ "Tigrisoma mexicanum", "Alligator mississippiensis", "Ambystoma mexicanum" ]	2	This organism is an axolotl. Its scientific name is Ambystoma mexicanum.	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...	An axolotl's scientific name is Ambystoma mexicanum. The first word of its scientific name is Ambystoma. Tigrisoma mexicanum and Ambystoma mexicanum are not in the same genus. These organisms are not in the same genus, but part of their scientific names is the same. Tigrisoma mexicanum and Ambystoma mexicanum have the ...
train/584	In this food chain, the reef squid is a tertiary consumer. Why?	[ "It eats a producer.", "It eats a primary consumer.", "It eats a secondary consumer." ]	2	This diagram shows a food chain from a tropical coral reef ecosystem off the coast of Australia.	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 reef squid is a tertiary consumer because it eats a secondary consumer. The secondary consumer in this food chain is the blue sprat.
train/585	What is the capital of Michigan?	[ "Grand Rapids", "Hartford", "Bismarck", "Lansing" ]	3		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Midwest		Lansing is the capital of Michigan.
train/586	Which solution has a higher concentration of pink particles?	[ "Solution B", "neither; their concentrations are the same", "Solution A" ]	0	The diagram below is a model of two solutions. Each pink ball represents one particle of solute.	closed choice	grade8	natural science	chemistry	Solutions	Compare concentrations of solutions	A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution...	In Solution A and Solution B, the pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container. Use the concentration formula to find the number of pink particles per milliliter. ...
train/587	What is the expected ratio of offspring with a spotted tail to offspring with an unspotted tail? Choose the most likely ratio.	[ "0:4", "3:1", "4:0", "2:2", "1:3" ]	3	In a group of guppies, some individuals have a spotted tail and others have an unspotted tail. In this group, the gene for the tail spots trait has two alleles. The allele for a spotted tail (I) is dominant over the allele for an unspotted tail (i). This Punnett square shows a cross between two guppies.	closed choice	grade8	natural science	biology	Genes to traits	Use Punnett squares to calculate ratios of offspring types	Offspring phenotypes: dominant or recessive? How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a...	To determine how many boxes in the Punnett square represent offspring with a spotted tail or an unspotted tail, consider whether each phenotype is the dominant or recessive allele's version of the tail spots trait. The question tells you that the I allele, which is for a spotted tail, is dominant over the i allele, whi...
train/588	Which continent is highlighted?	[ "Australia", "North America", "Europe", "Asia" ]	3		closed choice	grade7	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 Asia.
train/589	What is the capital of Massachusetts?	[ "Boston", "Plymouth", "Atlanta", "Providence" ]	0		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Northeast		Boston is the capital of Massachusetts.
train/590	Which of these states is farthest west?	[ "Wisconsin", "New Hampshire", "North Carolina", "Florida" ]	0		closed choice	grade3	social science	geography	Geography	Read a map: cardinal directions	Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west. A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction. The north arrow points to the North Pole. On most maps, north...	To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Wisconsin is farthest west.
train/591	Which animal's limbs are also adapted for gliding?	[ "northern flying squirrel", "ring-tailed lemur" ]	0	Sugar gliders live in the forests of Southeast Asia. They have two arms and two legs. They also have a thin layer of skin, called a patagium, stretched between their arms and legs. Sugar gliders use the patagium to glide through the air from tree to tree. The 's limbs are adapted for gliding. Figure: sugar glider.	closed choice	grade3	natural science	biology	Adaptations	Animal adaptations: feet and limbs	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp...	Look at the picture of the sugar glider. The sugar glider can spread its patagium like a wing. This helps it glide through the air from the higher branches of one tree to the lower branches of another tree. Now look at each animal. Figure out which animal has a similar adaptation. The northern flying squirrel has a pat...
train/592	Think about the magnetic force between the magnets in each pair. Which of the following statements is true?	[ "The magnitude of the magnetic force is the same in both pairs.", "The magnitude of the magnetic force is greater in Pair 1.", "The magnitude of the magnetic force is greater in Pair 2." ]	1	The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes 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 larger the magnets, the greater the magnitude of the magnetic force between them. Magnet A is the same size in both pairs. But Magnet B is larger in Pair 1 than in Pair 2. So, the magnitud...
train/593	What can Matthew and Robert trade to each get what they want?	[ "Matthew can trade his tomatoes for Robert's broccoli.", "Robert can trade his broccoli for Matthew's oranges.", "Robert can trade his almonds for Matthew's tomatoes.", "Matthew can trade his tomatoes for Robert's carrots." ]	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. Matthew and Robert open their lunch boxes in the school cafeteria. Neither Matthew nor Robert got everything that they wanted. Th...	closed choice	grade8	social science	economics	Basic economic principles	Trade and specialization		Look at the table and images. Matthew wants broccoli. Robert 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/594	During this time, thermal energy was transferred from () to ().	[ "the surroundings . . . each battery", "each battery . . . the surroundings" ]	1	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/595	Which fish's mouth is also adapted for tearing through meat?	[ "threespot damselfish", "barracuda" ]	1	Sand tiger sharks eat turtles, dolphins, and other fish. The mouth of the tiger shark is adapted to tear through meat. Figure: sand tiger shark.	closed choice	grade3	natural science	biology	Adaptations	Animal adaptations: beaks, mouths, and necks	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. The shape of 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 sand tiger shark. The sand tiger shark has a large mouth and sharp teeth. Its mouth is adapted for tearing through meat. The sand tiger shark uses its teeth to cut up meat into pieces it can swallow. Now look at each animal. Figure out which animal has a similar adaptation. The barracuda has ...
train/596	What is the capital of Wyoming?	[ "Madison", "Cheyenne", "Chicago", "Laramie" ]	1		closed choice	grade5	social science	geography	State capitals	Identify the 50 state capitals		Cheyenne is the capital of Wyoming.
train/597	Which ocean is highlighted?	[ "the Pacific Ocean", "the Arctic Ocean", "the Atlantic 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 Pacific Ocean.
train/598	Is the following statement about our solar system true or false? The volume of Saturn is more than ten times the volume of Uranus.	[ "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...	To determine if this statement is true, calculate the value of ten times the volume of Uranus. Then compare the result to the volume of Saturn. The volume of Saturn is 8.27 x 10^14 km^3, which is greater than 6.83 x 10^14 km^3. So, the volume of Saturn is more than ten times the volume of Uranus.
train/599	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." ]	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	grade6	natural science	physics	Velocity, acceleration, and forces	Compare magnitudes of magnetic forces	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,...	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.

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