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Which property do these three objects have in common? | [
"translucent",
"opaque",
"fragile"
] | 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 translucent object lets light through. But you cannot see clearly through a translucent object. None of the objects are translucent.
A fragile object will break into pieces if you drop it. None of the objects are fragile.
An opaque object does not ... | |
Which of the following organisms is the primary consumer in this food web? | [
"Arctic fox",
"rough-legged hawk",
"mushroom"
] | 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 | grade6 | natural science | biology | Ecological interactions | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Primary consumers eat producers. So, in a food web, primary consumers have arrows pointing to them from producers.
The mushroom has arrows pointing to it from the barren-ground caribou and the grizzly bear. Neither the barren-ground caribou nor the grizzly bear is a producer, so the earthworm is not a primary consumer.... | |
Which of these states is farthest east? | [
"Louisiana",
"North Dakota",
"North Carolina",
"Arizona"
] | 2 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. North Carolina is farthest east. | ||
Which statement best describes the average monthly precipitation in New Orleans? | [
"The wettest months of the year are June, July, and August.",
"October is the wettest month.",
"June, July, and August are the driest months of the year."
] | 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 New Orleans, look at the graph.
Choice "Jun" is incorrect.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Oct" is incorrect.
Choice "June, July, and August are the driest months of the year." is incorrect.
On average, slightly more precipitation falls durin... | |
Which continent is highlighted? | [
"North America",
"Africa",
"Asia"
] | 2 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Asia. | ||
Which of these states is farthest south? | [
"Maine",
"Massachusetts",
"Washington",
"North Dakota"
] | 1 | 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 south arrow is pointing. Massachusetts is farthest south. | ||
During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each refrigerator",
"each refrigerator . . . the surroundings"
] | 0 | Two identical refrigerators in a restaurant kitchen lost power. The door of one fridge was slightly open, and the door of the other fridge was closed. This table shows how the temperature of each refrigerator changed over 10minutes. | closed choice | grade8 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each refrigerator increased, which means that the thermal energy of each refrigerator increased. So, thermal energy was transferred from the surroundings to each refrigerator. | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different 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 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 ... | |
Which of the following organisms is the producer in this food web? | [
"silver maple",
"beaver",
"gray fox",
"pine vole"
] | 0 | Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade7 | natural science | biology | Ecological interactions | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Producers do not eat other organisms. So, in a food web, producers do not have arrows pointing to them from other organisms.
The persimmon tree does not have any arrows pointing to it. So, the persimmon tree is a producer.
The gray fox has arrows pointing to it, so it is not a producer.
The silver maple does not have a... | |
Which animal's skin is also adapted for survival in cold places? | [
"caribou",
"scarlet snake"
] | 0 | s live in the Canadian Arctic and Greenland. The 's skin is adapted to help the animal survive in cold places.
Figure: Arctic hare. | 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 Arctic hare.
During the winter, the Arctic hare has thick fur covering its skin. Its skin is adapted for survival in cold places. The Arctic hare uses its fur to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
During the winter, the caribo... | |
What is the capital of Maryland? | [
"Birmingham",
"Frankfort",
"Annapolis",
"Baltimore"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | |||
Which property do these four objects have in common? | [
"fragile",
"stretchy",
"sour"
] | 1 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A fragile object will break into pieces if you drop it. The rubber band is not fragile.
A stretchy object gets longer when you pull on it. All four objects are stretchy.
A lemon has a sour taste. The melted marshmallow is not sour.
The property that ... | |
Identify the question that Ben'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.
Ben 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. Be... | 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... | ||
What is the name of the colony shown? | [
"New Hampshire",
"Vermont",
"New York",
"Delaware"
] | 2 | 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. | |||
What is the capital of Missouri? | [
"Pierre",
"Kansas City",
"Jefferson City",
"Wichita"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Jefferson City is the capital of Missouri. | |||
Which animal's legs are also adapted for wading? | [
"demoiselle crane",
"African penguin"
] | 0 | Gray herons live near marshes, rivers, and lakes. They eat frogs and fish that live in shallow water. Gray herons hunt their prey by walking through water, or wading.
The 's legs are adapted for wading. They are lightweight and keep the bird's body above the water.
Figure: gray heron. | 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 gray heron.
Long legs help the gray heron keep its body above the surface of the water while wading. Thin legs are easier to move through the water.
Now look at each animal. Figure out which animal has a similar adaptation.
The demoiselle crane has long, thin legs. Its legs are adapted for wa... | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater.
There is a smaller distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1. | |
Select the organism in the same genus as the Japanese honeysuckle. | [
"Hyacinthus orientalis",
"Lonicera maackii",
"Ulex europaeus"
] | 1 | This organism is a Japanese honeysuckle. Its scientific name is Lonicera japonica. | 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 Japanese honeysuckle's scientific name is Lonicera japonica. The first word of its scientific name is Lonicera.
Hyacinthus orientalis is in the genus Hyacinthus. The first word of its scientific name is Hyacinthus. So, Hyacinthus orientalis and Lonicera japonica are not in the same genus.
Lonicera maackii is in the g... | |
Which material is this clothes hanger made of? | [
"cardboard",
"wood"
] | 1 | closed choice | grade2 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the clothes hanger.
The clothes hanger is made of two different materials. The hook is made of metal. The rest of the hanger is made of wood. | ||
Is the following statement about our solar system true or false?
Earth is the largest planet that is made mainly of rock. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that 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. | |
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.
Both poles of each magnet line up with both poles of the other magnet. The south pole of each magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. | |
Which country is highlighted? | [
"Kiribati",
"Nauru",
"the Marshall Islands",
"Solomon Islands"
] | 2 | 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... | |||
Which ocean is highlighted? | [
"the Atlantic Ocean",
"the Indian Ocean",
"the Southern Ocean",
"the Pacific Ocean"
] | 3 | 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 Pacific Ocean. | ||
Which of the following could Darnell's test show? | [
"whether an inexpensive filter would become clogged more often",
"whether the filter was clogged",
"the amount of bacteria in the water before it was filtered"
] | 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 | 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... | ||
Which ocean is highlighted? | [
"the Atlantic Ocean",
"the Indian Ocean",
"the Arctic Ocean",
"the Pacific Ocean"
] | 0 | 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 Atlantic Ocean. | ||
What is the name of the colony shown? | [
"Massachusetts",
"Rhode Island",
"New Hampshire",
"Vermont"
] | 2 | closed choice | grade5 | social science | us-history | English colonies in North 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. | |||
Which continent is highlighted? | [
"Australia",
"North America",
"South America",
"Asia"
] | 3 | closed choice | grade3 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Asia. | ||
Select the organism in the same species as the Indian rock python. | [
"Python molurus",
"Lacerta agilis",
"Nerodia cyclopion"
] | 0 | This organism is an Indian rock python. Its scientific name is Python molurus. | 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... | An Indian rock python's scientific name is Python molurus.
Nerodia cyclopion does not have the same scientific name as an Indian rock python. So, Python molurus and Nerodia cyclopion are not in the same species.
Python molurus has the same scientific name as an Indian rock python. So, these organisms are in the same sp... | |
What is the capital of Oklahoma? | [
"Boise",
"Oklahoma City",
"Little Rock",
"Birmingham"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Oklahoma City is the capital of Oklahoma. | |||
Which country is highlighted? | [
"Haiti",
"Cuba",
"the Dominican Republic",
"The Bahamas"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Haiti.
Does Haiti have any territorial disputes?
Haiti claims to own Navassa Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
Navassa Island is also claimed by the United States. The United States claimed the island in 18... | |||
Which of the following could Rose's test show? | [
"if the new turbine could turn easily",
"whether the new turbine could produce 10% more electricity",
"how much the new turbine would weigh"
] | 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 | 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... | ||
Which continent is highlighted? | [
"Africa",
"North America",
"South America",
"Asia"
] | 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 Asia. | ||
Identify the question that Ronald's experiment can best answer. | [
"Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?",
"Does temperature affect how much bacteria can grow in liquid?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Ronald mixed bacteria into a nutrient-rich liquid where the bacteria could grow. He poured four ounces of the mixture into each of ten glass flasks. In five of the ten flasks, he also added one teaspoon of cinnamon. He ... | 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... | ||
Which solution has a higher concentration of pink particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | 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.
... | |
What is the capital of Alabama? | [
"Montgomery",
"Columbus",
"Oklahoma City",
"Birmingham"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Montgomery is the capital of Alabama. | |||
Which of these states is farthest east? | [
"Ohio",
"New Jersey",
"Kansas",
"South Carolina"
] | 1 | 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 east arrow is pointing. New Jersey is farthest east. | ||
Select the organism in the same species as the purple heron. | [
"Caprimulgus europaeus",
"Ardea purpurea",
"Ardea herodias"
] | 1 | This organism is a purple heron. Its scientific name is Ardea purpurea. | 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 purple heron's scientific name is Ardea purpurea.
Ardea purpurea is in the same genus as Ardea herodias, but they are not in the same species.
Organisms in the same species have the same scientific names. Ardea purpurea and Ardea herodias are different species within the same genus.
Caprimulgus europaeus does not hav... | |
What can Clara and Harry trade to each get what they want? | [
"Harry can trade his almonds for Clara's tomatoes.",
"Clara can trade her tomatoes for Harry's carrots.",
"Harry can trade his broccoli for Clara's oranges.",
"Clara can trade her tomatoes for Harry'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.
Clara and Harry open their lunch boxes in the school cafeteria. Neither Clara nor Harry 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.
Clara wants broccoli. Harry 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. | ||
What location was involved in the triangular trade? | [
"China",
"the Thirteen Colonies"
] | 1 | By the 1700s, merchants in the Thirteen Colonies traded goods across the Atlantic Ocean in a pattern called triangular trade. Look at the map showing this trade. Then answer the question below. | closed choice | grade7 | social science | us-history | The American Revolution | Causes of the American Revolution: introduction to mercantilism and the Navigation Acts | Look at the map.
The arrows on the map show that goods moved to and from these locations:
China was not involved in the triangular trade. | ||
What type of rock is sandstone? | [
"igneous",
"metamorphic",
"sedimentary"
] | 2 | This is a piece of sandstone. Sandstone forms below the ground in places like deserts and beaches. This piece of rock shows dark and light layers.
Sandstone forms from sand grains. Sand grains are tiny pieces of rock that are broken off by water, wind, or ice. Layers of sand can build up in some places. Over time, thes... | closed choice | grade6 | natural science | earth-science | Rocks and minerals | Classify rocks as igneous, sedimentary, or metamorphic | Igneous rock is formed when melted rock cools and hardens into solid rock. This type of change can occur at Earth's surface or below it.
Sedimentary rock is formed when layers of sediment are pressed together, or compacted, to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when ... | Sandstone is a sedimentary rock. Like other sedimentary rocks, it forms from layers of sediment.
Material that is eroded in nature is called sediment. Sand is a type of sediment. Over time, layers of sand can build up in places like deserts and beaches. The top layers press down on the bottom layers, squeezing out wate... | |
Based on the arrows, which of the following organisms is a producer? | [
"lichen",
"barren-ground caribou"
] | 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... | Producers do not eat other organisms. So, in a food web, producers do not have arrows pointing to them from other organisms.
The lichen does not have an arrow pointing to it. So, the lichen is a producer.
The barren-ground caribou has an arrow pointing to it from the lichen. So, the barren-ground caribou is a consumer,... | |
Select the organism in the same species as the American alligator. | [
"Alligator sinensis",
"Alligator mississippiensis",
"Aequorea victoria"
] | 1 | This organism is an American alligator. Its scientific name is Alligator mississippiensis. | 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 American alligator's scientific name is Alligator mississippiensis.
Aequorea victoria does not have the same scientific name as an American alligator. So, Alligator mississippiensis and Aequorea victoria are not in the same species.
Alligator mississippiensis is in the same genus as Alligator sinensis, but they are ... | |
Which term matches the picture? | [
"Cenozoic era",
"Mesozoic era"
] | 1 | Read the text.
Scientists divide the history of Earth into eras. Different types of animal life help distinguish these eras. We live in the Cenozoic era, which began roughly sixty-six million years ago. The Cenozoic era is known as the Age of Mammals because mammals, like humans, are the largest land animals. During th... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | The Mesozoic era is also known as the Age of Reptiles. During the Mesozoic era, reptiles like dinosaurs were the dominant animal species. | ||
Select the mammal below. | [
"loon",
"great white shark",
"albatross",
"Tasmanian devil"
] | 3 | Mammals have hair or fur and feed their young milk.
Mammals are warm-blooded. Warm-blooded animals can control their body temperature.
A koala 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 loon is a bird. It has feathers, two wings, and a beak.
Loons usually live near lakes. They dive in the water to hunt for food.
An albatross is a bird. It has feathers, two wings, and a beak.
Albatrosses live near the ocean. They hunt squid, fish, and other small animals.
A Tasmanian devil is a mammal. It has fur and... | |
Is the following statement about our solar system true or false?
75% of the planets are made mainly of rock. | [
"false",
"true"
] | 0 | Use the data to answer the question below. | true-or false | grade7 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that four out of the eight planets are made mainly of rock. So, one-half, or 50%, of the planets are made mainly of rock. | |
Is apple juice a solid or a liquid? | [
"a solid",
"a liquid"
] | 1 | closed choice | grade2 | natural science | physics | States of matter | Classify matter as solid or liquid | Solid and liquid are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a shape of its own.
Some solids can be bent or broken easily. Others are hard to bend or break.
A glass cup is a solid. A sock is also a solid.
When matter is a li... | Apple juice is a liquid. A liquid takes the shape of any container it is in.
If you pour apple juice into a different container, the apple juice will take the shape of that container. But the apple juice will still take up the same amount of space. | ||
What is the capital of Oklahoma? | [
"Tulsa",
"Bridgeport",
"Columbia",
"Oklahoma City"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Oklahoma City is the capital of Oklahoma. | |||
Which of the following was a dependent variable in this experiment? | [
"the number of bacteria in a drop of tea",
"the amount of time that the tea sat on the desk"
] | 0 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Every day at work, Valentina poured a large cup of tea that she drank throughout the morning. She wondered how much bacteria might be growing in her cup of tea as the morning went on.
To find out, Valentina fi... | 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... | ||
Which of the following could Tara and Rosanne's test show? | [
"if the concrete from each batch took the same amount of time to dry",
"if a new batch of concrete was firm enough to use"
] | 1 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade6 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | ||
Which ocean is highlighted? | [
"the Southern Ocean",
"the Indian Ocean",
"the Atlantic Ocean",
"the Pacific Ocean"
] | 3 | 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 Pacific Ocean. | ||
Select the reptile below. | [
"clownfish",
"helmeted iguana"
] | 1 | Reptiles have scaly, waterproof skin. Most reptiles live on land. A coral snake is an example of a reptile. | 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 clownfish is a fish. It lives underwater. It has fins, not limbs.
Clownfish live with animals called anemones. In the image of the clownfish, you can see the green anemone behind the clownfish.
A helmeted iguana is a reptile. It has scaly, waterproof skin.
Iguanas are a type of lizard. Iguanas eat plants and fruit. | |
Which statement best describes the average monthly precipitation in Atlanta? | [
"February is wetter than March.",
"Atlanta has a rainy season and a dry season.",
"Precipitation does not change much from month to month in Atlanta."
] | 2 | 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 Atlanta, look at the graph.
Choice "Feb" is incorrect.
Choice "Mar" is incorrect.
Choice "Atlanta has a rainy season and a dry season." is incorrect.
The average monthly precipitation does not change much throughout the year. Every month has rain, and there is no dry seas... | |
Which trait did this aurochs have? Select the trait you can observe on the fossil. | [
"four legs",
"a striped body"
] | 0 | This picture shows a fossil of an animal called an aurochs.
The aurochs was hunted by humans and went extinct around 1627. The oldest aurochs fossils are about 2,000,000 years old. | 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... | ||
Which trait do African wild dogs have? | [
"They live in packs with thousands of other African wild dogs.",
"They have four legs."
] | 1 | This picture shows two African wild dogs.
African wild dogs live in groups called packs. Between 3 and 20 adult African wild dogs live together in a pack. | closed choice | grade3 | natural science | literacy-in-science | Animals | Benefits of group behavior: African wild dogs | Both the picture and the text tell you about the traits of African wild dogs. Start with the picture.
These African wild dogs have black, brown, and white fur. They also have four legs and two ears.
Next, read the text about African wild dogs.
African wild dogs live in groups called packs. Between 3 and 20 adult Africa... | ||
Which material is this door made of? | [
"wool",
"metal"
] | 1 | closed choice | grade3 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the door.
This door is made of two different materials. The body of the door is made of wood. The door knob is made of metal.
Not all doors are made of wood. The body of a door can be made of metal or even glass. | ||
Which continent is highlighted? | [
"Australia",
"South America",
"North America",
"Europe"
] | 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. | ||
Which of these continents does the prime meridian intersect? | [
"North America",
"Africa",
"South 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 prime meridian is the line at 0° longitude. It intersects Africa. It does not intersect North America or South America. | ||
Which is this organism's common name? | [
"marine file snake",
"Acrochordus granulatus"
] | 0 | This organism is a marine file snake. It is also called Acrochordus granulatus. | 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,... | Acrochordus granulatus is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Acrochordus granulatus is the organism's scientific name. So, you know that marine file snake is the common name. | |
Which solution has a higher concentration of green particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... | |
Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Nepal.
A group of climbers were happy about the warm temperatures during their hike last Thursday. They were hiking in Nepal, which is home to Mount Everest.
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 | 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.
A group of climbers were happy about the warm temperatures during their hike last Thursday. They were hiking in Nepal, which is home to Mount Everest.
The underlined part of the passage tells you about the temperature in Nepal last Thursday. This passage describes the atmosphere at a certain... | |
Which country is highlighted? | [
"Dominica",
"Saint Vincent and the Grenadines",
"Jamaica",
"Barbados"
] | 2 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Jamaica. | |||
What is the capital of New Jersey? | [
"Trenton",
"Honolulu",
"Jersey City",
"Hartford"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Trenton is the capital of New Jersey. | |||
Is the water in a fishbowl a solid, a liquid, or a gas? | [
"a liquid",
"a gas",
"a solid"
] | 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... | The water in a fishbowl is a liquid. A liquid takes the shape of any container it is in.
If you pour water from a fishbowl into a different container, the water will take the shape of that container. But the water will still take up the same amount of space. | ||
Which state is highlighted? | [
"Texas",
"Oklahoma",
"Virginia",
"Georgia"
] | 2 | closed choice | grade5 | social science | geography | States | Identify states of the Southeast | This state is Virginia. | |||
Which term matches the picture? | [
"analogous structures",
"homologous structure"
] | 1 | Read the text.
Biologists can look at how related two animals are by comparing their body parts, or structures. Analogous structures are parts with the same purpose but with different structures, like a fin and a flipper. Different species may develop analogous structures when they live in similar environments even if ... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | Homologous structures have the same basic parts and suggest different species shared a common ancestor. A person's arm and a frog's arm are both made of a similar set of bones, even though the bones within a frog's arm are differently sized and shaped than those in a human's. | ||
Earth's organisms rely on the atmosphere for which of the following? | [
"stable temperatures",
"sunlight"
] | 0 | Read the text. Then answer the question.
Earth is surrounded by a layer of gases called the atmosphere. The gases that make up the atmosphere sustain life on Earth. Living organisms take in and release some of these gases. Gases in the atmosphere also help insulate Earth from extreme temperatures and block some harmful... | closed choice | grade6 | natural science | earth-science | Climate change | The greenhouse effect | Read the text carefully. The underlined text below shows information about each answer choice.
Earth is surrounded by a layer of gases called the atmosphere. The gases that make up the atmosphere sustain life on Earth. Living organisms take in and release some of these gases. Gases in the atmosphere also help insulate ... | ||
Which of the following fossils is younger? Select the more likely answer. | [
"ginkgo leaf",
"insect"
] | 1 | This diagram shows fossils in an undisturbed sedimentary rock sequence. | closed choice | grade8 | natural science | earth-science | Fossils | Compare ages of fossils in a rock sequence | A fossil is the preserved evidence of an ancient organism. Some fossils are formed from body parts such as bones or shells. Other fossils, such as footprints or burrows, are formed from traces of an organism's activities.
Fossils are typically found in sedimentary rocks. Sedimentary rocks usually form in layers. Over t... | Look again at the fossils in the rock sequence diagram.
Compare the positions of these fossils to determine which one is younger:
The insect fossil is in a shallower layer in the rock sequence than the ginkgo leaf fossil. So, the insect fossil is most likely younger than the ginkgo leaf fossil. | |
Which country is highlighted? | [
"Tuvalu",
"the Marshall Islands",
"Kiribati",
"Nauru"
] | 2 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | |||
Which continent is highlighted? | [
"Africa",
"North America",
"South America",
"Europe"
] | 0 | 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 Africa. | ||
Look at the models of molecules below. Select the elementary substance. | [
"cyclopropane",
"chloroform",
"nitrogen"
] | 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 ... | |||
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 strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker 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. | 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 farther apart, the magnetic force between them is weaker.
The magnets in Pair 1 are farther apart than the magnets in Pair 2. So, the magnetic force is weaker in Pair 1 than in Pair 2. | |
What is the name of the colony shown? | [
"Georgia",
"Rhode Island",
"Pennsylvania",
"Iowa"
] | 2 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Pennsylvania. | |||
What is the capital of Idaho? | [
"Olympia",
"Saint Louis",
"Cincinnati",
"Boise"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Boise is the capital of Idaho. | |||
Identify the question that Zach's experiment can best answer. | [
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?",
"Can pennies hold more drops of pure water or water mixed with hand soap?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Zach used a dropper to put equal-sized drops of pure water, one at a time, onto a penny. The drops stayed together and formed a dome on the penny's surface. Zach recorded the number of drops he could add before the wate... | 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... | ||
During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each cake",
"each cake . . . the surroundings"
] | 1 | Keenan baked two identical cakes. When he took them out of the oven, he left one cake in its pan and took the other cake out of its pan to put it on a plate. This table shows how the temperature of each cake changed over 5minutes. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each cake decreased, which means that the thermal energy of each cake decreased. So, thermal energy was transferred from each cake to the surroundings. | |
In this food chain, the yucca moth is a consumer. Why? | [
"It makes its own food.",
"It eats another living thing."
] | 1 | This diagram shows a food chain from a desert ecosystem in Southern California. | closed choice | grade3 | natural science | biology | Ecosystems | Identify roles in food chains | Every living thing needs food to stay alive. Living things get their food in different ways. A food chain shows how living things 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 ... | In this food chain, the yucca moth is a consumer because it eats another living thing. The yucca moth in this food chain eats the Mojave yucca. | |
Which fish's mouth is also adapted for tearing through meat? | [
"starry moray",
"copperband butterflyfish"
] | 0 | Piranhas eat mostly fish. The 's mouth is adapted to tear through meat.
Figure: piranha. | closed choice | grade5 | 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 piranha.
The piranha has large, sharp teeth. Its mouth is adapted for tearing through meat. The piranha 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 and sharp teeth. Its ... | |
Which property matches this object? | [
"transparent",
"bouncy"
] | 0 | 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 bouncy object will bounce back from the floor if you drop it. The glass bottle is not bouncy.
You can see clearly through a transparent object. The glass bottle is transparent. | |
Which better describes the Jardines de la Reina National Park ecosystem? | [
"It has bright sunlight. It also has shallow water.",
"It has water with not much salt. It also has only a few types of organisms."
] | 0 | Figure: Jardines de la Reina National Park.
Jardines de la Reina National Park is a tropical coral reef ecosystem near the southern coast of Cuba. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A tropical coral reef is a type of ecosystem. Tropical coral reefs have the following features: shallow, salty water, bright sunlight, and many different types of organisms. So, Jardines de la Reina National Park has bright sunlight. It also has shallow water. | |
Is the air inside a bubble a solid, a liquid, or a gas? | [
"a liquid",
"a gas",
"a solid"
] | 1 | 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... | The air inside a bubble is a gas. A gas expands to fill a space.
The air inside a bubble fills all the space in the bubble. If the bubble pops, the air will expand to fill a much larger space. | ||
Which country is highlighted? | [
"Dominica",
"Saint Kitts and Nevis",
"Jamaica",
"the Dominican Republic"
] | 3 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is the Dominican Republic.
Why does the Dominican Republic share its island with another country?
The Dominican Republic and Haiti share the island of Hispaniola. It is home to the earliest European settlements in the Americas. Christopher Columbus founded the first European settlement on the island in 149... | |||
What is the name of the colony shown? | [
"Virginia",
"Delaware",
"Georgia",
"West Virginia"
] | 0 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Virginia.
The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony. | |||
Which of these cities is marked on the map? | [
"Nashville",
"Houston",
"Charlotte",
"New Orleans"
] | 1 | closed choice | grade4 | social science | geography | Cities | Cities of the Southeast | The city is Houston, Texas. Nashville, New Orleans, and Charlotte are marked with gray circles on the map below. | |||
Look at the models of molecules below. Select the elementary substance. | [
"oxygen",
"bromomethane",
"methane"
] | 0 | 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 ... | |||
Which property do these three objects have in common? | [
"blue",
"sticky",
"fuzzy"
] | 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.
Blue is a color.
This color is blue. The kiwi and the stuffed dice are not blue.
A fuzzy object is covered in soft hair. All three objects are fuzzy.
A sticky object can attach or stick to other things. The socks and the stuffed dice are not sticky.
... | |
Complete the sentence.
The word "antebellum" means (). | [
"after the long peace",
"before the war",
"after the election",
"before the feast"
] | 1 | The time period in United States history between 1820 and 1861 is often called the antebellum period. During the antebellum period, the North and South became more divided. In the following questions, you learn more about the changes that happened during the antebellum period.
The following table shows other words that... | closed choice | grade8 | social science | us-history | The Antebellum period | Causes of the Civil War: Missouri Compromise to Bleeding Kansas | Look at the underlined parts of the table.
All the words that use the root "ante" mean to come before something else. So, the root ante means "before."
All the words that use the root "bellum" mean to fight or cause war.So, the root bellum means "war."
So, the word "antebellum" means "before the war." The antebellum pe... | ||
Is fruit punch a solid, a liquid, or a gas? | [
"a solid",
"a liquid",
"a gas"
] | 1 | 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... | Fruit punch is a liquid. A liquid takes the shape of any container it is in.
If you pour fruit punch into a cup, the punch will take the shape of the cup. But the punch will still take up the same amount of space. | ||
What is the capital of Washington? | [
"Spokane",
"Seattle",
"Olympia",
"Phoenix"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Olympia is the capital of Washington. | |||
Which statement describes the Tibetan Plateau ecosystem? | [
"It has warm summers and cool winters.",
"It has soil that is frozen year-round."
] | 1 | Figure: Tibetan Plateau.
The Tibetan Plateau is a tundra ecosystem located in Tibet, western China, and northern India. The plateau is over 14,800 feet high and is surrounded by many mountain ranges. | 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 tundra is a type of ecosystem. Tundras have the following features: long, cold winters and short, cold summers, soil that is frozen year-round, and mostly small plants. So, the following statements describe the Tibetan Plateau ecosystem: long, cold winters and short, cold summers, soil that is frozen year-round, and ... | |
Which property do these three objects have in common? | [
"stretchy",
"rough",
"bouncy"
] | 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 rough object feels scratchy when you touch it. All three objects are rough.
A stretchy object gets longer when you pull on it. The rock and the tree bark are not stretchy.
A bouncy object will bounce back from the floor if you drop it. The tree bar... | |
Which property do these three objects have in common? | [
"bouncy",
"hard",
"stretchy"
] | 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 hard object does not change shape when pressed or squeezed. All three objects are hard.
A stretchy object gets longer when you pull on it. None of the objects are stretchy.
A bouncy object will bounce back from the floor if you drop it. None of the... | |
Identify the question that Natalie's experiment can best answer. | [
"Does fabric turn darker when soaked in a mixture of black dye and water for 15 minutes compared to 30 minutes?",
"Does linen fabric turn darker than cotton fabric when soaked in a mixture of black dye and water?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Natalie prepared ten buckets, each with one gallon of boiling water and three tablespoons of black fabric dye. Natalie soaked white linen fabric squares in five of the buckets, and white cotton fabric squares in the oth... | 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... | ||
Select the organism in the same genus as the axolotl. | [
"Python reticulatus",
"Tigrisoma mexicanum",
"Ambystoma opacum"
] | 2 | This organism is an axolotl. Its scientific name is Ambystoma mexicanum. | 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... | An axolotl's scientific name is Ambystoma mexicanum. The first word of its scientific name is Ambystoma.
Python reticulatus is in the genus Python. The first word of its scientific name is Python. So, Python reticulatus and Ambystoma mexicanum are not in the same genus.
Ambystoma opacum is in the genus Ambystoma. The f... | |
Which continent is highlighted? | [
"Australia",
"Antarctica",
"South America",
"Asia"
] | 0 | 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 Australia. | ||
What can Bryce and Victor trade to each get what they want? | [
"Victor can trade his broccoli for Bryce's oranges.",
"Bryce can trade his tomatoes for Victor's broccoli.",
"Victor can trade his almonds for Bryce's tomatoes.",
"Bryce can trade his tomatoes for Victor's carrots."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Bryce and Victor open their lunch boxes in the school cafeteria. Neither Bryce nor Victor got everything that they wanted. The ta... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Bryce wants broccoli. Victor 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. | ||
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 | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sample B mus... | |
Look at the models of molecules below. Select the elementary substance. | [
"bromomethane",
"trichlorofluoromethane",
"tetraphosphorus"
] | 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 ... | |||
Which of these continents does the equator intersect? | [
"North America",
"Africa",
"Europe"
] | 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 Europe or North America. | ||
Which continent is highlighted? | [
"Europe",
"Asia",
"Australia",
"South America"
] | 0 | 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. | ||
Which property do these three objects have in common? | [
"shiny",
"bumpy",
"bouncy"
] | 2 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A bouncy object will bounce back from the floor if you drop it. All three objects are bouncy.
A shiny object reflects a lot of light. You can usually see your reflection in a shiny object. The basketball is not shiny.
A bumpy object is covered in lum... |
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