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train/2900 | Which continent is highlighted? | [
"North America",
"Europe",
"Antarctica",
"Australia"
] | 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 Europe. | |
train/2901 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 0 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/2902 | Which of the following was a dependent variable in this experiment? | [
"the amount of light produced by the light bulb",
"the type of metal sheet used in the circuit"
] | 0 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Dominic designed an electric circuit to test how well different types of metal conduct electricity. The circuit included a battery, a light bulb, wires, and clips that could be attached to a sheet of metal. If... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify independent and dependent variables | Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato... | |
train/2903 | Select the mammal below. | [
"Hermann's tortoise",
"fruit bat"
] | 1 | Mammals have hair or fur and feed their young milk. A sea otter is an example of a mammal. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A fruit bat is a mammal. It has hair and feeds its young milk.
A Hermann's tortoise is a reptile. It has scaly, waterproof skin. |
train/2904 | What is the name of the colony shown? | [
"North Carolina",
"South Carolina",
"Connecticut",
"New Jersey"
] | 3 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is New Jersey. | ||
train/2905 | What is the capital of Alaska? | [
"Wichita",
"Fairbanks",
"Pierre",
"Juneau"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/2906 | Which bird's beak is also adapted to filter through mud? | [
"Canada goose",
"Alexandrine parakeet"
] | 0 | Northern pintails eat plants that grow underwater or in mud. The shape of the 's beak is adapted to filter through mud for food.
The gathers muddy water in its beak and then pushes it out through gaps along the sides. Bits of food, such as plant roots, are left behind inside the pintail's beak.
Figure: northern pintai... | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the northern pintail.
The northern pintail has a wide, flat beak. Its beak is adapted to filter through mud. The northern pintail gathers muddy water in its beak. Then, it pushes the water out through gaps along the sides of the beak. Bits of food, such as plant roots, are left behind inside the ... |
train/2907 | Which property matches this object? | [
"colorful",
"breakable"
] | 0 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. | Look at the object.
Think about each property.
A colorful object has one or more bright colors. The parachute is colorful.
A breakable object will break into pieces if you drop it. The parachute is not breakable. |
train/2908 | What is the name of the colony shown? | [
"South Carolina",
"Florida",
"Maryland",
"Washington, D.C."
] | 2 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/2909 | Mature fern plants have flat leaves. What are fern leaves called? | [
"fronds",
"spore cases"
] | 0 | This diagram shows the life cycle of a fern. | closed choice | grade7 | natural science | biology | Plant reproduction | Moss and fern life cycles | Fern plants reproduce using both asexual reproduction and sexual reproduction.
Mature ferns have flat leaves called fronds. Ferns have structures that look like small dots on the underside of their fronds. These structures are called spore cases. The mature ferns use asexual reproduction to make spores. When the spore ... | Fern leaves are called fronds.
Spore cases are found on the underside of fronds. When a spore case breaks open, it releases the spores. |
train/2910 | Which property matches this object? | [
"rough",
"transparent"
] | 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.
You can see clearly through a transparent object. The glass bowl is transparent.
A rough object feels scratchy when you touch it. The glass bowl is not rough. |
train/2911 | Which solution has a higher concentration of pink particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | 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/2912 | Which of these states is farthest east? | [
"South Dakota",
"Illinois",
"Kansas",
"Maine"
] | 3 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Maine is farthest east. | |
train/2913 | Which statement best describes the average monthly precipitation in Boston? | [
"About the same amount of precipitation falls each month between May and October.",
"March is the month with the highest average precipitation.",
"March is drier than January, February, and October."
] | 0 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average precipitation for each month. The average precipitation can be used to describe the climate of a location.
A... | To describe the average precipitation trends in Boston, look at the graph.
Choice "Jan" is incorrect.
Choice "Feb" is incorrect.
Choice "Mar" is incorrect.
Choice "May" is incorrect.
Choice "Oct" is incorrect.
Choice "March is drier than January, February, and October." is incorrect.
Drier months have a lower average p... |
train/2914 | Which statement describes the Gobi Desert ecosystem? | [
"It has warm summers and mild winters.",
"It has year-round snow.",
"It has a small amount of rain or snow."
] | 2 | Figure: Gobi Desert.
The Gobi Desert is a cold desert ecosystem located in northern China and southern Mongolia. This desert is next to the Himalayan Mountains and used to be part of the Mongol Empire. | closed choice | grade6 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A cold desert is a type of ecosystem. Cold deserts have the following features: a small amount of rain or snow, dry, thin soil, and long, cold winters. So, the following statement describes the Gobi Desert ecosystem: a small amount of rain or snow, dry, thin soil, and long, cold winters. It has a small amount of rain o... |
train/2915 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: windfarm off the coast of Denmark.
Wind turbines use energy from the wind to make electricity. These large turbines, located off the coast of Denmark, take advantage of the steady winds that blow here year-round.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of... | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Wind turbines use energy from the wind to make electricity. These large turbines, located off the coast of Denmark, take advantage of the steady winds that blow here year-round.
The underlined part of the passage tells you about the usual wind patterns in Denmark. This passage does not descr... |
train/2916 | Which ocean is highlighted? | [
"the Indian Ocean",
"the Southern Ocean",
"the Atlantic Ocean",
"the Pacific Ocean"
] | 1 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Southern Ocean.
The Southern Ocean reaches from the shores of Antarctica to 60° South latitude. | |
train/2917 | Which continent is highlighted? | [
"Australia",
"Europe",
"Africa",
"Antarctica"
] | 1 | 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 Europe. | |
train/2918 | Is lava a solid, a liquid, or a gas? | [
"a solid",
"a gas",
"a liquid"
] | 2 | 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... | Lava is a liquid. A liquid can change shape. But it still takes up the same amount of space.
Lava is melted rock. Rock is usually a solid. But when it gets hot enough, it can melt! Unlike solid rock, lava can change shape easily and flow. | |
train/2919 | Which air temperature was measured within the outlined area shown? | [
"5°C",
"-10°C",
"0°C"
] | 1 | The map below shows air temperatures in the lower atmosphere on March 19, 2017. The outlined area shows an air mass that influenced weather in Asia on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Laboratory, ... | closed choice | grade6 | 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 air temperatures.
The map's legend tells you the temperature that each color represents. Colors on the left in the legend represent lower temperatures than colors on the right. For ... | Look at the colors shown within the outlined area. Then, use the legend to determine which air temperatures those colors represent.
5°C.
-10°C is within this range.
0°C and 5°C are outside of this range. |
train/2920 | 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 1.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger 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 | 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/2921 | Is helium a solid, a liquid, or a gas? | [
"a gas",
"a solid",
"a liquid"
] | 0 | closed choice | grade3 | natural science | physics | States of matter | Classify matter as solid, liquid, or gas | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a 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... | Helium is a gas. A gas expands to fill a space.
Helium is lighter than air. So, if you fill a balloon with helium, the balloon will rise. If helium leaks out of the balloon, the helium will expand into the space around the balloon. | |
train/2922 | 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/2923 | What is the capital of Wyoming? | [
"Cheyenne",
"Raleigh",
"Laramie",
"Saint Paul"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/2924 | 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/2925 | Which country is highlighted? | [
"Vanuatu",
"Nauru",
"Australia",
"Solomon Islands"
] | 0 | closed choice | grade8 | 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/2926 | Which continent is highlighted? | [
"Asia",
"South America",
"Africa",
"Australia"
] | 2 | 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 Africa. | |
train/2927 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 1 | Figure: Glacier Bay.
Humpback whales migrate each spring from Mexico to Alaska. They are often seen in Glacier Bay, Alaska, in late spring. Light winds are common in the spring, averaging eight miles per hour in May.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of wea... | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Humpback whales migrate each spring from Mexico to Alaska. They are often seen in Glacier Bay, Alaska, in late spring. Light winds are common in the spring, averaging eight miles per hour in May.
The underlined part of the passage tells you about the usual wind patterns in Glacier Bay. This ... |
train/2928 | Select the organism in the same species as the European nightjar. | [
"Caprimulgus europaeus",
"Ardea alba",
"Caprimulgus macrurus"
] | 0 | This organism is a European nightjar. Its scientific name is Caprimulgus europaeus. | 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 European nightjar's scientific name is Caprimulgus europaeus.
Ardea alba does not have the same scientific name as a European nightjar. So, Caprimulgus europaeus and Ardea alba are not in the same species.
Caprimulgus europaeus has the same scientific name as a European nightjar. So, these organisms are in the same s... |
train/2929 | Is the following statement about our solar system true or false?
Earth is the largest planet that is made mainly of rock. | [
"false",
"true"
] | 1 | Use the data to answer the question below. | true-or false | grade7 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that Mercury, Venus, Earth, and Mars are the planets made mainly of rock. Of these planets, Earth is the largest. So, Earth is the largest planet that is made mainly of rock. |
train/2930 | Which state is highlighted? | [
"Vermont",
"Maine",
"Delaware",
"New Hampshire"
] | 1 | closed choice | grade3 | social science | geography | States | Identify states of the Northeast | This state is Maine. | ||
train/2931 | Does Victoria amazonica have cells that have a nucleus? | [
"no",
"yes"
] | 1 | This organism is Victoria amazonica. It is a member of the plant kingdom.
Victoria amazonica is commonly called the giant water lily. A single leaf can be over eight feet wide! The giant water lily grows in shallow water in the Amazon river basin. | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Victoria amazonica is a plant. Plant cells have a nucleus. |
train/2932 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample B have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sampl... |
train/2933 | Which statement describes the Great Basin Desert ecosystem? | [
"It has year-round snow.",
"It has a small amount of rain or snow.",
"It has a medium amount of rain."
] | 1 | Figure: Great Basin Desert.
The Great Basin Desert is a cold desert ecosystem in the western United States that covers much of Nevada. This desert also covers parts of Utah, California, and Idaho. | closed choice | grade8 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A cold desert is a type of ecosystem. Cold deserts have the following features: a small amount of rain or snow, dry, thin soil, and long, cold winters. So, the following statement describes the Great Basin Desert ecosystem: a small amount of rain or snow, dry, thin soil, and long, cold winters. It has a small amount of... |
train/2934 | Which of these states is farthest south? | [
"California",
"Washington",
"Maine",
"South Dakota"
] | 0 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. California is farthest south. | |
train/2935 | Which ocean is highlighted? | [
"the Southern Ocean",
"the Atlantic Ocean",
"the Indian Ocean",
"the Pacific Ocean"
] | 3 | closed choice | grade7 | 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/2936 | In this food chain, the Arctic bell-heather is a producer. Why? | [
"It eats another organism.",
"It makes its own food."
] | 1 | This diagram shows a food chain from Baffin Island, a tundra ecosystem in Canada. | closed choice | grade4 | natural science | biology | Ecosystems | Identify roles in food chains | Every organism needs food to stay alive. Organisms get their food in different ways. A food chain shows how organisms in an ecosystem get their food.
Producers make their own food. Many producers use carbon dioxide, water, and sunlight to make sugar. This sugar is food for the producer.
Consumers eat other organisms. C... | In this food chain, the Arctic bell-heather is a producer because it makes its own food. The Arctic bell-heather uses carbon dioxide, water, and sunlight to make its own food. |
train/2937 | What is the capital of Arizona? | [
"Cambridge",
"Carson City",
"Phoenix",
"Sacramento"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Phoenix is the capital of Arizona. | ||
train/2938 | 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"
] | 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/2939 | Select the organism in the same genus as the gray heron. | [
"Tigrisoma mexicanum",
"Ardea alba",
"Falco peregrinus"
] | 1 | This organism is a gray heron. Its scientific name is Ardea cinerea. | closed choice | grade4 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A gray heron's scientific name is Ardea cinerea. The first word of its scientific name is Ardea.
Falco peregrinus is in the genus Falco. The first word of its scientific name is Falco. So, Falco peregrinus and Ardea cinerea are not in the same genus.
Ardea alba is in the genus Ardea. The first word of its scientific na... |
train/2940 | Select the organism in the same species as the black-footed cat. | [
"Felis nigripes",
"Lynx rufus",
"Lynx canadensis"
] | 0 | This organism is a black-footed cat. Its scientific name is Felis nigripes. | 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 black-footed cat's scientific name is Felis nigripes.
Felis nigripes has the same scientific name as a black-footed cat. So, these organisms are in the same species.
Lynx canadensis does not have the same scientific name as a black-footed cat. So, Felis nigripes and Lynx canadensis are not in the same species.
Lynx r... |
train/2941 | Identify the question that Cara and Preston's experiment can best answer. | [
"Does Cara'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 Cara'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.
Cara 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 more... | 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/2942 | Which country is highlighted? | [
"Nauru",
"the Marshall Islands",
"Tuvalu",
"Kiribati"
] | 3 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | ||
train/2943 | What is the capital of New Hampshire? | [
"Raleigh",
"Concord",
"Manchester",
"Juneau"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Concord is the capital of New Hampshire. | ||
train/2944 | Which country is highlighted? | [
"Papua New Guinea",
"Samoa",
"New Zealand",
"Australia"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Australia.
Is Australia a country or a continent?
Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead. | ||
train/2945 | Identify the question that Trisha's experiment can best answer. | [
"Do the temperatures inside boxes depend on the sizes of the boxes?",
"Do the insides of white boxes get hotter than the insides of black boxes when the boxes are left in the sun?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Trisha glued lids onto 16 cardboard shoe boxes of equal size. She painted eight of the boxes black and eight of the boxes white. Trisha made a small hole in the side of each box and then stuck a thermometer partially in... | closed choice | grade6 | 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/2946 | Which of these states is farthest north? | [
"New York",
"North Carolina",
"Kentucky",
"Arkansas"
] | 0 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. New York is farthest north. | |
train/2947 | What is the capital of Kansas? | [
"Kansas City",
"Wichita",
"Columbus",
"Topeka"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Topeka is the capital of Kansas. | ||
train/2948 | Which of these states is farthest south? | [
"Texas",
"Maine",
"Nebraska",
"Indiana"
] | 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. Texas is farthest south. | |
train/2949 | Which statement describes the Catoctin Mountain Park ecosystem? | [
"It has many different types of trees.",
"It has soil that is poor in nutrients.",
"It has soil that is rich in nutrients."
] | 2 | Figure: Catoctin Mountain Park.
Catoctin Mountain Park is a temperate deciduous forest ecosystem in Maryland. Most of this forest was cut down for its wood in the early 1900s. But since the 1940s, conservation efforts have allowed the forest to return to much of this park. | closed choice | grade5 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, the following statement describes the Catoctin Mountain Park ecosystem: warm, wet summers and cold, we... |
train/2950 | Which country is highlighted? | [
"Vanuatu",
"Fiji",
"New Zealand",
"Nauru"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Nauru. | ||
train/2951 | Which property do these four objects have in common? | [
"slippery",
"hard",
"transparent"
] | 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.
You can see clearly through a transparent object. None of the objects are transparent.
A slippery object is hard to hold onto or stand on. All four objects are slippery.
A hard object does not change shape when pressed or squeezed. The wet paint, the... |
train/2952 | What is the capital of New Jersey? | [
"Trenton",
"Phoenix",
"Manchester",
"Harrisburg"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Trenton is the capital of New Jersey. | ||
train/2953 | Which country is highlighted? | [
"Jamaica",
"The Bahamas",
"Cuba",
"Trinidad and Tobago"
] | 2 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Cuba.
Does Cuba have any territorial disputes?
Cuba claims to own Guantanamo Bay Naval Base, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
The United States controls the area and uses it as a military base and prison. A treaty... | ||
train/2954 | Which country is highlighted? | [
"Tonga",
"the Marshall Islands",
"the Federated States of Micronesia",
"Solomon Islands"
] | 1 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is the Marshall Islands.
Does the Marshall Islands have any territorial disputes?
The Marshall Islands claims to own Wake Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
The United States claimed Wake Island in 1899 and has... | ||
train/2955 | Select the reptile below. | [
"elongated tortoise",
"eagle ray",
"porcupinefish",
"fruit bat"
] | 0 | 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 Mojave rattlesnake 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 porcupinefish is a fish. It lives underwater. It has fins, not limbs.
Porcupinefish can puff up their bodies with air or water to scare off predators.
A fruit bat is a mammal. It has hair and feeds its young milk.
Fruit bats eat fruit and drink nectar from flowers. They have special teeth to help them bite through fr... |
train/2956 | In this food chain, the whirligig beetle is a secondary consumer. Why? | [
"It eats a primary consumer.",
"It eats a producer.",
"It eats a tertiary consumer."
] | 0 | This diagram shows a food chain from Lake Superior, a freshwater ecosystem on the border of the United States and Canada. | closed choice | grade5 | natural science | biology | Ecosystems | Identify roles in food chains | Every organism needs food to stay alive. Organisms get their food in different ways. A food chain shows how organisms in an ecosystem get their food.
The food chain begins with the producer. A producer can change matter that is not food into food. Many producers use carbon dioxide, water, and sunlight to make sugar. Ca... | In this food chain, the whirligig beetle is a secondary consumer because it eats a primary consumer. The primary consumer in this food chain is the mayfly. |
train/2957 | Which animal is also adapted for flight? | [
"flamingo",
"white-cheeked gibbon"
] | 0 | Flying foxes live in the forests of Southeast Asia and Australia. The has wings. It is adapted for flight.
Figure: flying fox. | 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 flying fox.
The flying fox has large, powerful wings. It is adapted for flight. Long, powerful wings help the flying fox travel long distances by air.
Now look at each animal. Figure out which animal has a similar adaptation.
The flamingo has large, powerful wings. It is adapted for flight.
T... |
train/2958 | Which is this organism's common name? | [
"Goura cristata",
"western crowned pigeon"
] | 1 | This organism is Goura cristata. It is also called a western crowned pigeon. | closed choice | grade7 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Goura cristata is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Goura cristata is the organism's scientific name. So, you know that western crowned pigeon is the common name. |
train/2959 | Select the organism in the same genus as the Canada lynx. | [
"Lithobates catesbeianus",
"Lynx pardinus",
"Castor canadensis"
] | 1 | This organism is a Canada lynx. Its scientific name is Lynx canadensis. | closed choice | grade6 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A Canada lynx's scientific name is Lynx canadensis. The first word of its scientific name is Lynx.
Lithobates catesbeianus is in the genus Lithobates. The first word of its scientific name is Lithobates. So, Lithobates catesbeianus and Lynx canadensis are not in the same genus.
Lynx pardinus is in the genus Lynx. The f... |
train/2960 | Which property do these three objects have in common? | [
"transparent",
"yellow",
"bouncy"
] | 2 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A bouncy object will bounce back from the floor if you drop it. All three objects are bouncy.
Yellow is a color.
This color is yellow. The inflatable castle is yellow, but the rubber ball and the spring are not.
You can see clearly through a transpar... |
train/2961 | 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 smaller in Pair 2.",
"The magnitude of the magnetic force is smaller 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 sizes. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/2962 | Which property do these two objects have in common? | [
"salty",
"bendable"
] | 0 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
Potato chips have a salty taste. Both objects are salty.
A bendable object can be bent without breaking. The potato chips are not bendable.
The property that both objects have in common is salty. |
train/2963 | Which solution has a higher concentration of green particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each green 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 green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/2964 | Which statement describes the Sahara Desert ecosystem? | [
"It has a small amount of rain.",
"It has only a few types of organisms.",
"It has thick, moist soil"
] | 0 | Figure: Sahara Desert.
The Sahara Desert in northern Africa is the largest hot desert in the world. Less than one-fifth of this desert is covered in sand dunes. Most of the Sahara Desert is covered by bare rock, gravel, and pebbles! | closed choice | grade7 | 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, many different types of organisms, and It has thick, moist soil. So, the following statement describes the Sahara Desert ecosystem: a small amount of rain, dry, thin soil, many different types of organi... |
train/2965 | Which of the following could Matt'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/2966 | 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 smaller in Pair 2.",
"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 | 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,... | 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/2967 | What can Jen and Nate trade to each get what they want? | [
"Nate can trade his almonds for Jen's tomatoes.",
"Jen can trade her tomatoes for Nate's carrots.",
"Jen can trade her tomatoes for Nate's broccoli.",
"Nate can trade his broccoli for Jen's oranges."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Jen and Nate open their lunch boxes in the school cafeteria. Neither Jen nor Nate got everything that they wanted. The table belo... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Jen wants broccoli. Nate 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/2968 | Which of the following organisms is the tertiary consumer in this food web? | [
"golden algae",
"black crappie",
"rotifer"
] | 1 | 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... | Tertiary consumers eat secondary consumers. So, in a food web, tertiary consumers have arrows pointing to them from secondary consumers. Secondary consumers have arrows pointing to them from primary consumers. And primary consumers have arrows pointing to them from producers.
The copepod has an arrow pointing to it fro... |
train/2969 | Which state is highlighted? | [
"Georgia",
"Alabama",
"West Virginia",
"Mississippi"
] | 3 | closed choice | grade5 | social science | geography | States | Identify states of the Southeast | This state is Mississippi. | ||
train/2970 | In this food chain, the copepod is a primary consumer. Why? | [
"It eats a primary consumer.",
"It eats a secondary consumer.",
"It eats a producer."
] | 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 copepod is a primary consumer because it eats a producer. The producer in this food chain is the diatom. |
train/2971 | Which country is highlighted? | [
"the Marshall Islands",
"Kiribati",
"Palau",
"Solomon Islands"
] | 0 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is the Marshall Islands.
Does the Marshall Islands have any territorial disputes?
The Marshall Islands claims to own Wake Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
The United States claimed Wake Island in 1899 and has... | ||
train/2972 | Which of these continents does the equator intersect? | [
"Australia",
"Africa",
"North America"
] | 1 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The equator is the line at 0° latitude. It intersects Africa. It does not intersect Australia or North America. | |
train/2973 | Select the organism in the same species as the agile wallaby. | [
"Macropus agilis",
"Ovis aries",
"Lontra canadensis"
] | 0 | This organism is an agile wallaby. Its scientific name is Macropus agilis. | closed choice | grade4 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | An agile wallaby's scientific name is Macropus agilis.
Lontra canadensis does not have the same scientific name as an agile wallaby. So, Macropus agilis and Lontra canadensis are not in the same species.
Ovis aries does not have the same scientific name as an agile wallaby. So, Macropus agilis and Ovis aries are not in... |
train/2974 | Which animal's feet are also adapted for grabbing prey? | [
"warthog",
"New Zealand falcon"
] | 1 | Golden eagles eat fish, mammals, and other birds. The 's feet are adapted to grab prey.
Figure: golden eagle. | 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.
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/2975 | Which country is highlighted? | [
"the Dominican Republic",
"Trinidad and Tobago",
"Cuba",
"Dominica"
] | 3 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Dominica. | ||
train/2976 | Select the amphibian below. | [
"white stork",
"Galapagos giant tortoise",
"Nile crocodile",
"red-eyed tree frog"
] | 3 | Amphibians have moist skin and begin their lives in water.
Amphibians are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A European green toad is an example of an amphibian. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | A Nile crocodile is a reptile. It has scaly, waterproof skin.
Crocodiles hunt their prey in or near water.
A white stork is a bird. It has feathers, two wings, and a beak.
Storks wade in shallow water to look for food. Storks eat fish, insects, worms, and other small animals.
A red-eyed tree frog is an amphibian. It ha... |
train/2977 | Which of these states is farthest north? | [
"West Virginia",
"Alabama",
"New Jersey",
"Montana"
] | 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 north arrow is pointing. Montana is farthest north. | |
train/2978 | What is the probability that a pea plant produced by this cross will be homozygous dominant for the stem height gene? | [
"1/4",
"0/4",
"4/4",
"2/4",
"3/4"
] | 0 | In a group of pea plants, some individuals have a tall stem and others have a short stem. In this group, the gene for the stem height trait has two alleles. The allele for a short stem (h) is recessive to the allele for a tall stem (H).
This Punnett square shows a cross between two pea plants. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | |
train/2979 | Which of these cities is marked on the map? | [
"Portland",
"Salt Lake City",
"San Francisco",
"San Diego"
] | 2 | closed choice | grade5 | social science | geography | Cities | Cities of the West | The city is San Francisco, California. Salt Lake City, San Diego, and Portland are marked with gray circles on the map below. | ||
train/2980 | Which country is highlighted? | [
"Saint Vincent and the Grenadines",
"Grenada",
"Trinidad and Tobago",
"Dominica"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Grenada. | ||
train/2981 | Which is this organism's common name? | [
"zebra dove",
"Geopelia striata"
] | 0 | This organism is Geopelia striata. It is also called a zebra dove. | closed choice | grade7 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Geopelia striata is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Geopelia striata is the organism's scientific name. So, you know that zebra dove is the common name. |
train/2982 | What is the capital of Oregon? | [
"Portland",
"Salem",
"Charlotte",
"Nashville"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Salem is the capital of Oregon. | ||
train/2983 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Quito.
Quito is the capital of Ecuador. The wind was blowing out of the south there yesterday.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade4 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Quito is the capital of Ecuador. The wind was blowing out of the south there yesterday.
The underlined part of the passage tells you about the wind direction in Quito yesterday. This passage describes the atmosphere at a certain place and time. So, this passage describes the weather. |
train/2984 | Select the fish below. | [
"bald eagle",
"anchovy",
"brown tree frog",
"loon"
] | 1 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A tiger shark is an example of a fish. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | An anchovy is a fish. It lives underwater. It has fins, not limbs.
An anchovy is a small fish that lives in the ocean. Like some other types of fish, anchovies swim in large groups called schools.
A bald eagle is a bird. It has feathers, two wings, and a beak.
Bald eagles live in trees near water. They build nests that... |
train/2985 | 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 | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample A have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average kinetic energy, sampl... |
train/2986 | Which of these states is farthest north? | [
"Louisiana",
"Missouri",
"Arizona",
"North Carolina"
] | 1 | 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 north arrow is pointing. Missouri is farthest north. | |
train/2987 | What is the capital of Utah? | [
"Santa Fe",
"Cheyenne",
"Salt Lake City",
"Sacramento"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Salt Lake City is the capital of Utah. | ||
train/2988 | Which solution has a higher concentration of yellow particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each yellow 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 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/2989 | Which country is highlighted? | [
"New Zealand",
"Vanuatu",
"Australia",
"Papua New Guinea"
] | 2 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Australia.
Is Australia a country or a continent?
Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead. | ||
train/2990 | Identify the question that Evelyn's experiment can best answer. | [
"Do more tomato seedlings grow when they are planted in soil with fertilizer compared to soil without fertilizer?",
"Does the humidity level where tomato seeds are planted affect the number of tomato seedlings that grow?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Evelyn planted 25 tomato seeds one-half inch below the soil surface in each of six pots. Evelyn added an equal amount of fertilizer to three of the six pots. She placed the pots in a plant growth chamber where all the s... | closed choice | grade6 | 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/2991 | Which property do these three objects have in common? | [
"rough",
"fragile",
"flexible"
] | 1 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A fragile object will break into pieces if you drop it. All three objects are fragile.
A flexible object can be folded or bent without breaking easily. None of the objects are flexible.
A rough object feels scratchy when you touch it. None of the obj... |
train/2992 | What is the capital of Texas? | [
"Houston",
"Austin",
"Baton Rouge",
"Frankfort"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | ||
train/2993 | Which property matches this object? | [
"yellow",
"slippery"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. | Look at the object.
Think about each property.
A slippery object is hard to hold onto or stand on. The water slide is slippery.
Yellow is a color.
This color is yellow. The water slide is not yellow. |
train/2994 | Identify the question that Martha'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.
Martha poured four ounces of water into each of six glasses. Martha dissolved one tablespoon of salt in each of three glasses, and did not add salt to the other three. Then, Martha placed an egg in one glass and observe... | closed choice | grade6 | 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/2995 | What is the capital of Maryland? | [
"Annapolis",
"New Haven",
"Baltimore",
"Providence"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | ||
train/2996 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/2997 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Great Wall.
The Great Wall is located in northern China. Low clouds formed over the Great Wall early Monday morning.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade4 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
The Great Wall is located in northern China. Low clouds formed over the Great Wall early Monday morning.
The underlined part of the passage tells you about the cloud cover at the Great Wall on Monday morning. This passage describes the atmosphere at a certain place and time. So, this passage... |
train/2998 | What is the name of the colony shown? | [
"Vermont",
"Rhode Island",
"Kentucky",
"New Hampshire"
] | 3 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Hampshire.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | ||
train/2999 | 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 smaller in Pair 2.",
"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, 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,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is smaller in Pair 2 than in Pair 1. |
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