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train/4200 | Identify the question that Shelby's experiment can best answer. | [
"Can light bulbs stay lit longer when circuits include copper or when circuits include iron?",
"Do circuits that include iron produce dimmer light than circuits that include copper?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Shelby built an electric circuit: she used wires to connect a battery to a light bulb, the light bulb to a small piece of copper, and the copper back to the battery. When the circuit was complete, the light turned on. S... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4201 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | 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 1 than in Pair 2. So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2. |
train/4202 | What is the capital of California? | [
"San Francisco",
"Denver",
"Helena",
"Sacramento"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Sacramento is the capital of California. | ||
train/4203 | Is glitter a solid, a liquid, or a gas? | [
"a gas",
"a solid",
"a liquid"
] | 1 | 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... | Glitter is a solid. A solid has a size and shape of its own. Glitter is made of many small pieces of plastic.
Imagine putting many pieces of glitter in a bottle. The glitter takes the shape of the bottle, as a liquid would. But be careful! Glitter is not a liquid. Each piece of glitter still has a size and shape of its... | |
train/4204 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample A have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average kinetic energy, sampl... |
train/4205 | Identify the question that Juan's experiment can best answer. | [
"Do bananas develop more brown spots if they are kept in bags with holes compared to bags without holes?",
"Do bananas develop more brown spots when they are kept at room temperature compared to in a cold refrigerator?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Juan divided 40 evenly among eight paper bags and sealed the bags. He poked 20 small holes in four of the bags and left the other four without holes. He kept the bags at room temperature for three days. Then, Juan open... | 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/4206 | Is graphite a mineral? | [
"yes",
"no"
] | 0 | Graphite has the following properties:
made of a pure substance called carbon
solid
not made by living things
fixed crystal structure
found in nature | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Graphite has all the properties of a mineral. So, graphite is a mineral. |
train/4207 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | 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 north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/4208 | Which solution has a higher concentration of yellow particles? | [
"neither; their concentrations are the same",
"Solution A",
"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/4209 | Which statement is supported by these pictures? | [
"The groundhog has toes, and so did Marmota primigenia.",
"The groundhog has a mostly tan body, but Marmota primigenia did not."
] | 0 | Look at the two pictures below. The groundhog is a modern organism, and Marmota primigenia is an extinct one. The groundhog has many of the traits that Marmota primigenia had. | closed choice | grade4 | natural science | earth-science | Fossils | Compare ancient and modern organisms: use observations to support a hypothesis | Fossils are the remains of organisms that lived long ago. Scientists look at fossils to learn about the traits of ancient organisms. Often, scientists compare fossils to modern organisms.
Some ancient organisms had many traits in common with modern organisms. Other ancient organisms were very different from any organis... | The groundhog has toes and a mostly tan body.
This fossil of Marmota primigenia shows the bones of its toes. So, Marmota primigenia had toes.
This fossil does not preserve the remains of skin or fur. So, you cannot tell from the fossil whether Marmota primigenia had a mostly tan body.
Choice "The groundhog has a mostly... |
train/4210 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the left than to the right",
"to the right than to the left"
] | 1 | The diagram below shows a solution with one solute. Each solute particle is represented by a purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 6 solute particles on the left side of the membrane and 4 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/4211 | Which solution has a higher concentration of pink particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | 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/4212 | What is the capital of Utah? | [
"Provo",
"Salt Lake City",
"Sioux Falls",
"Boise"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | ||
train/4213 | Which material is these scissors made of? | [
"metal",
"wool"
] | 0 | closed choice | grade2 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the scissors.
Scissors are made of two different materials. The handles are made of plastic, and the blades are made of metal. | |
train/4214 | Which of the following was a dependent variable in this experiment? | [
"the number of earthworms",
"the number of leaves"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Derek grew ten on his back porch. He grew each plant in its own pot, and each pot was the same size and shape. Derek noticed that his plants did not grow many leaves, and he wanted to see if earthworms could ... | 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/4215 | What is the capital of Nebraska? | [
"Fargo",
"Lincoln",
"Omaha",
"Frankfort"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Lincoln is the capital of Nebraska. | ||
train/4216 | What is the capital of Wyoming? | [
"Boise",
"Cheyenne",
"Providence",
"Nampa"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/4217 | 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 and shapes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/4218 | Which country is highlighted? | [
"Saint Vincent and the Grenadines",
"Barbados",
"Saint Lucia",
"Grenada"
] | 0 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Vincent and the Grenadines. | ||
train/4219 | Select the reptile below. | [
"western rattlesnake",
"green frog"
] | 0 | Reptiles have scaly, waterproof skin. Most reptiles live on land. A dwarf crocodile 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 western rattlesnake is a reptile. It has scaly, waterproof skin.
Rattlesnakes have fangs they can use to inject venom into their prey.
A green frog is an amphibian. It has moist skin and begins its life in water.
Frogs live near water or in damp places. Most frogs lay their eggs in water. |
train/4220 | What is the expected ratio of offspring that do not have Bekko patterning to offspring that have Bekko patterning? Choose the most likely ratio. | [
"4:0",
"3:1",
"0:4",
"2:2",
"1:3"
] | 0 | This passage describes the Bekko patterning trait in koi fish:
The Bekko pattern is a pattern of colors found on the bodies of some koi fish. A koi fish with Bekko patterning has black patches all over its body. A koi fish without Bekko patterning does not have these patches.
In a group of koi fish, some individuals ha... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring that do or do not have Bekko patterning, consider whether each phenotype is the dominant or recessive allele's version of the Bekko patterning trait. The question tells you that the B allele, which is for having Bekko patterning, is dominant over the... |
train/4221 | What is the name of the colony shown? | [
"Pennsylvania",
"Connecticut",
"New York",
"Massachusetts"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Connecticut. | ||
train/4222 | Which property do these three objects have in common? | [
"bouncy",
"opaque",
"translucent"
] | 1 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
An opaque object does not let light through. All three objects are opaque.
A translucent object lets light through. But you cannot see clearly through a translucent object. The license plate is not translucent.
A bouncy object will bounce back from t... |
train/4223 | Which is the main persuasive appeal used in this ad? | [
"ethos (character)",
"pathos (emotion)",
"logos (reason)"
] | 2 | closed choice | grade7 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals:
Appeals to ethos, or character, show that the writer or speaker is trustworthy or is an authority on a subject. An ad that appeals to ethos might do one... | The ad appeals to logos, or reason. It focuses on the science behind the product. | |
train/4224 | Which i in column 1? | [
"the fast-food restaurant",
"the theater",
"the pond",
"the grocery store"
] | 2 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The pond is in column 1. | |
train/4225 | Select the bird below. | [
"olive toad",
"pelican"
] | 1 | Birds have feathers, two wings, and a beak. A woodpecker is an example of a bird. | closed choice | grade3 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A pelican is a bird. It has feathers, two wings, and a beak.
Brown pelicans live near water. They can dive underwater to catch fish.
An olive toad is an amphibian. It has moist skin and begins its life in water.
Toads do not have teeth! They swallow their food whole. |
train/4226 | 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 1.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni... |
train/4227 | Which continent is highlighted? | [
"Australia",
"North America",
"Africa",
"South America"
] | 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 South America. | |
train/4228 | Which solution has a higher concentration of purple particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each purple 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 purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... |
train/4229 | Is Myrmarachne maxillosa made up of many cells? | [
"yes",
"no"
] | 0 | This organism is Myrmarachne maxillosa. It is a member of the animal kingdom.
Myrmarachne maxillosa is a spider. But its body shape mimics, or copies, the shape of an ant. Mimicking an ant helps M. maxillosa avoid predators that eat spiders. You can tell that M. maxillosa is a spider by counting its legs. Spiders have ... | 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... | Myrmarachne maxillosa is an animal. Animals are made up of many cells. |
train/4230 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/4231 | Which property matches this object? | [
"colorful",
"scratchy"
] | 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 scratchy object is rough and itchy against your skin. The pool toy is not scratchy.
A colorful object has one or more bright colors. The pool toy is colorful. |
train/4232 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample A have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average kinetic energy, sampl... |
train/4233 | Select the organism in the same species as the Christmas tree worm. | [
"Nerodia clarkii",
"Spirobranchus giganteus",
"Python molurus"
] | 1 | This organism is a Christmas tree worm. Its scientific name is Spirobranchus giganteus. | 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 Christmas tree worm's scientific name is Spirobranchus giganteus.
Python molurus does not have the same scientific name as a Christmas tree worm. So, Spirobranchus giganteus and Python molurus are not in the same species.
Nerodia clarkii does not have the same scientific name as a Christmas tree worm. So, Spirobranch... |
train/4234 | In this experiment, which were part of a control group? | [
"the plain apple slices",
"the apple slices covered with lemon juice"
] | 0 | The passage below describes an experiment.
The in Devon's lunch always turned brown by lunchtime. Devon's favorite cooking website said that pouring lemon juice on the would keep them from turning brown so quickly.
Devon cut an apple into eight slices. She poured two tablespoons of lemon juice over four of the slice... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify control and experimental groups | Experiments have variables, or parts that change. You can design an experiment to investigate whether changing a variable between different groups has a specific outcome.
For example, imagine you want to find out whether adding fertilizer to soil affects the height of pea plants. You could investigate this question wit... | In this experiment, Devon investigated whether lemon juice affects how quickly apple slices turn brown. The plain apple slices did not get lemon juice. So, they were part of a control group. |
train/4235 | Which of these states is farthest north? | [
"Oregon",
"Colorado",
"South Carolina",
"Delaware"
] | 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 north arrow is pointing. Oregon is farthest north. | |
train/4236 | Which statement is true about the average monthly precipitation in Nairobi? | [
"More precipitation falls in April than in August.",
"February is the wettest month of the year.",
"Nairobi gets about the same amount of precipitation each month."
] | 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 Nairobi, look at the graph.
Choice "Feb" is incorrect.
Choice "Apr" is incorrect.
Choice "Aug" is incorrect.
Choice "More precipitation falls in April than in August." is incorrect.
April has a higher average monthly precipitation than August.
Choice "February is the wett... |
train/4237 | Is the following statement about our solar system true or false?
The volume of Uranus is less than one-tenth of the volume of Saturn. | [
"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. | To determine if this statement is true, calculate the value of one-tenth the volume of Saturn.
Then compare the result to the volume of Uranus. The volume of Uranus is 68,300 billion km^3, which is less than 82,713 billion km^3. So, the volume of Uranus is less than one-tenth the volume of Saturn. |
train/4238 | Is a chocolate bar a solid, a liquid, or a gas? | [
"a solid",
"a liquid",
"a gas"
] | 0 | closed choice | grade4 | natural science | physics | States of matter | Identify and sort solids, liquids, and gases | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a... | A chocolate bar is a solid. A solid has a size and shape of its own.
A chocolate bar can melt in your mouth. But at room temperature, a chocolate bar is a solid. | |
train/4239 | Which of these organisms contains matter that was once part of the phytoplankton? | [
"orca",
"zooplankton"
] | 1 | Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade6 | natural science | biology | Ecological interactions | Interpret food webs II | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows that starts from the phytoplankton.There are four paths matter can take from the phytoplankton to the kelp bass: phytoplankton->zooplankton->kelp bass. phytoplankton->zooplankton->plainfin midshipman->k... |
train/4240 | What is the capital of Idaho? | [
"Boise",
"Santa Fe",
"Nampa",
"Nashville"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/4241 | What is the probability that an American curl cat produced by this cross will be homozygous dominant for the ear type gene? | [
"1/4",
"3/4",
"4/4",
"2/4",
"0/4"
] | 0 | In a group of American curl cats, some individuals have curled ears and others have straight ears. In this group, the gene for the ear type trait has two alleles. The allele for straight ears (e) is recessive to the allele for curled ears (E).
This Punnett square shows a cross between two American curl cats. | 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/4242 | Use the timeline to complete the following sentence.
The year () was before 100 CE. | [
"200 CE",
"300 BCE",
"500 CE"
] | 1 | Timelines are used to show when events happened. Timelines go from left to right. Events on the left happened earlier than events on the right.
On some timelines, dates are divided into two categories based on their relation to the year 1 CE.
Dates that occurred before 1 CE are labeled BCE, or Before the Common Era. BC... | closed choice | grade4 | social science | world-history | Social studies skills | Reading and creating timelines with BCE and CE | Timelines are used to show when events happened. Timelines go from left to right. Events on the left happened earlier than events on the right.
On some timelines, dates are divided into two categories:
Dates that occurred before the year 1 CE are labeled BCE, or Before the Common Era. These dates are sometimes labeled ... | Find the year 100 CE on the timeline.
Now look for the choice that is to the left of the year 100 CE. The year 300 BCE is to the left of the year 100 CE on the timeline. That means that 300 BCE was before 100 CE. |
train/4243 | Select the mammal below. | [
"fruit bat",
"bull shark"
] | 0 | Mammals have hair or fur and feed their young milk. A giraffe is an example of a mammal. | 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 bull shark is a fish. It lives underwater. It has fins, not limbs.
Bull sharks can live in both fresh and salt water. They are found in rivers and in shallow parts of the ocean.
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 t... |
train/4244 | What is the expected ratio of offspring with an unspotted tail to offspring with a spotted tail? Choose the most likely ratio. | [
"4:0",
"0:4",
"1:3",
"3:1",
"2:2"
] | 1 | In a group of guppies, some individuals have a spotted tail and others have an unspotted tail. In this group, the gene for the tail spots trait has two alleles. The allele for a spotted tail (I) is dominant over the allele for an unspotted tail (i).
This Punnett square shows a cross between two guppies. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring with an unspotted tail or a spotted tail, consider whether each phenotype is the dominant or recessive allele's version of the tail spots trait. The question tells you that the I allele, which is for a spotted tail, is dominant over the i allele, whi... |
train/4245 | Select the organism in the same species as the brown pelican. | [
"Pelecanus occidentalis",
"Haliaeetus pelagicus",
"Pelecanus philippensis"
] | 0 | This organism is a brown pelican. Its scientific name is Pelecanus occidentalis. | 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 brown pelican's scientific name is Pelecanus occidentalis.
Pelecanus occidentalis is in the same genus as Pelecanus philippensis, but they are not in the same species.
Organisms in the same species have the same scientific names. Pelecanus occidentalis and Pelecanus philippensis are different species within the same ... |
train/4246 | Which is this organism's common name? | [
"American crocodile",
"Crocodylus acutus"
] | 0 | This organism is an American crocodile. It is also called Crocodylus acutus. | closed choice | grade6 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Crocodylus acutus is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Crocodylus acutus is the organism's scientific name. So, you know that American crocodile is the common name. |
train/4247 | Which property do these three objects have in common? | [
"translucent",
"bouncy",
"colorful"
] | 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 translucent object lets light through. But you cannot see clearly through a translucent object. The crayons are not translucent.
A bouncy object will bounce back from the floor if you drop it. The silk tie is not bouncy.
A colorful object has one o... |
train/4248 | Which of the following was a dependent variable in this experiment? | [
"the number of ripe avocados",
"the number of ripe bananas"
] | 0 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Eliana liked to make guacamole, but she could often find only unripe at the grocery store. In biology class, Eliana learned that ripe fruits produce a gas called ethylene that can cause other fruits to ripen.... | 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/4249 | Which of these states is farthest north? | [
"North Carolina",
"Florida",
"Arkansas",
"Utah"
] | 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 north arrow is pointing. Utah is farthest north. | |
train/4250 | What is the expected ratio of offspring with a spotted tail to offspring with an unspotted tail? Choose the most likely ratio. | [
"3:1",
"1:3",
"0:4",
"2:2",
"4:0"
] | 4 | In a group of guppies, some individuals have a spotted tail and others have an unspotted tail. In this group, the gene for the tail spots trait has two alleles. The allele for a spotted tail (I) is dominant over the allele for an unspotted tail (i).
This Punnett square shows a cross between two guppies. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring with a spotted tail or an unspotted tail, consider whether each phenotype is the dominant or recessive allele's version of the tail spots trait. The question tells you that the I allele, which is for a spotted tail, is dominant over the i allele, whi... |
train/4251 | 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 1.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | 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 1 than in Pair 2. So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2. |
train/4252 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Gutenberg Castle, Liechtenstein.
Liechtenstein is a small country in Europe with many castles. Clouds settled over Gutenberg Castle on the first day of winter.
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.
Liechtenstein is a small country in Europe with many castles. Clouds settled over Gutenberg Castle on the first day of winter.
The underlined part of the passage tells you about the cloud cover over Gutenberg Castle on a particular day. This passage describes the atmosphere at a certain plac... |
train/4253 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | 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/4254 | What is the capital of Kentucky? | [
"Frankfort",
"Louisville",
"Austin",
"Charleston"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Frankfort is the capital of Kentucky. | ||
train/4255 | Which of these states is farthest west? | [
"Rhode Island",
"California",
"Alabama",
"Montana"
] | 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 west arrow is pointing. California is farthest west. | |
train/4256 | Which solution has a higher concentration of green particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 0 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/4257 | Which country is highlighted? | [
"Saint Lucia",
"Barbados",
"Saint Vincent and the Grenadines",
"Grenada"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Barbados. | ||
train/4258 | What is the capital of Kentucky? | [
"Frankfort",
"Columbia",
"Oklahoma City",
"Detroit"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Frankfort is the capital of Kentucky. | ||
train/4259 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample B",
"sample A"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, and the particles in both samples have the same average speed. So, the particles in both samples have the same average kinetic energy.
Because the particles in both samples have the same average kinetic energy, the samples must have the same temperature. |
train/4260 | Which country is highlighted? | [
"Nauru",
"the Federated States of Micronesia",
"Solomon Islands",
"the Marshall Islands"
] | 3 | 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/4261 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the right than to the left",
"to the left than to the right"
] | 1 | The diagram below shows a solution with one solute. Each solute particle is represented by a green ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time ... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there was 1 solute particle on the left side of the membrane and 5 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there w... |
train/4262 | Which animal is also adapted for flight? | [
"brahminy kite",
"chital"
] | 0 | Flamingos fly long distances every year in search of food and places to nest. They have wings instead of arms. Flamingos are adapted for flight.
Figure: flamingo. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the flamingo.
The flamingo has large, powerful wings. It is adapted for flight. Long, powerful wings help the flamingo travel long distances by air.
Now look at each animal. Figure out which animal has a similar adaptation.
The brahminy kite has long, powerful wings. It is adapted for flight.
The... |
train/4263 | Which is the main persuasive appeal used in this ad? | [
"logos (reason)",
"ethos (character)",
"pathos (emotion)"
] | 2 | closed choice | grade7 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals:
Appeals to ethos, or character, show that the writer or speaker is trustworthy or is an authority on a subject. An ad that appeals to ethos might do one... | The ad appeals to pathos, or emotion. It links the airline to feelings of luxury and relaxation. | |
train/4264 | Is the following statement about our solar system true or false?
The volume of Uranus is less than ten times the volume of Neptune. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of ten times the volume of Neptune.
Then compare the result to the volume of Uranus. The volume of Uranus is 6.83 x 10^13 km^3, which is less than 6.25 x 10^14 km^3. So, the volume of Uranus is less than ten times the volume of Neptune. |
train/4265 | Which property do these two objects have in common? | [
"sour",
"salty"
] | 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.
A lemon has a sour taste. Both objects are sour.
Potato chips have a salty taste. The lime is not salty.
The property that both objects have in common is sour. |
train/4266 | Select the organism in the same genus as the Amazon tree boa. | [
"Halichoeres hortulanus",
"Chroicocephalus ridibundus",
"Corallus hortulanus"
] | 2 | This organism is an Amazon tree boa. Its scientific name is Corallus hortulanus. | 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 Amazon tree boa's scientific name is Corallus hortulanus. The first word of its scientific name is Corallus.
Chroicocephalus ridibundus is in the genus Chroicocephalus. The first word of its scientific name is Chroicocephalus. So, Chroicocephalus ridibundus and Corallus hortulanus are not in the same genus.
This org... |
train/4267 | Which of these colonies was in New England? | [
"South Carolina",
"New Hampshire",
"New York"
] | 1 | In the following questions, you will learn about the origins of the New England Colonies. The New England Colonies made up the northern part of the Thirteen Colonies, which were ruled by Great Britain in the 1600s and 1700s.
The population of New England included Native American groups, enslaved and free people of Afri... | closed choice | grade7 | social science | us-history | Colonial America | New England Colonies: founding and government | Look at the legend on the map.
The colonies are shaded by region, and the New England Colonies are all shaded the same color. They include these colonies:
The rest of the Thirteen Colonies were part of the Middle Colonies or the Southern Colonies. | |
train/4268 | Which property matches this object? | [
"stretchy",
"shiny"
] | 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 shiny object reflects a lot of light. The gold nugget is shiny.
A stretchy object gets longer when you pull on it. The gold nugget is not stretchy. |
train/4269 | Is magnetite a mineral? | [
"no",
"yes"
] | 1 | Magnetite has the following properties:
pure substance
fixed crystal structure
solid
found in nature
not made by living things | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Magnetite has all the properties of a mineral. So, magnetite is a mineral. |
train/4270 | Identify the question that Lindsey'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.
Lindsey planted 25 tomato seeds one-half inch below the soil surface in each of six pots. Lindsey added an equal amount of fertilizer to three of the six pots. She placed the pots in a plant growth chamber where all the... | 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/4271 | Select the organism in the same genus as the bighorn sheep. | [
"Ovis orientalis",
"Macropus agilis",
"Alouatta palliata"
] | 0 | This organism is a bighorn sheep. Its scientific name is Ovis canadensis. | 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 bighorn sheep's scientific name is Ovis canadensis. The first word of its scientific name is Ovis.
Ovis orientalis is in the genus Ovis. The first word of its scientific name is Ovis. So, Ovis orientalis and Ovis canadensis are in the same genus.
Alouatta palliata is in the genus Alouatta. The first word of its scien... |
train/4272 | Which of these states is farthest east? | [
"Colorado",
"Texas",
"Oregon",
"Wisconsin"
] | 3 | 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. Wisconsin is farthest east. | |
train/4273 | Which continent is highlighted? | [
"North America",
"South America",
"Asia",
"Antarctica"
] | 3 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Antarctica. | |
train/4274 | Is bronze a mineral? | [
"yes",
"no"
] | 1 | Bronze has the following properties:
no fixed crystal structure
made in a factory
mixture of copper and tin
solid | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Bronze does not have all the properties of a mineral. So, bronze is not a mineral. |
train/4275 | Identify the question that Olivia and Jayce's experiment can best answer. | [
"Does Olivia'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 Olivia'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.
Olivia 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 mo... | 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/4276 | Which month is the warmest in Mexico City? | [
"June and July",
"October and November",
"April and May"
] | 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. Temperature is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average temperature for each month. The average temperature can be used to describe the climate of a location.
A line graph can be used t... | To describe the average temperature trends in Mexico City, look at the graph.
Choice "Apr" is incorrect.
Choice "May" is incorrect.
Choice "Jun" is incorrect.
Choice "Jul" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
The average temperatures in April and May are around 18°C. These months have the... |
train/4277 | Which solution has a higher concentration of yellow particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 0 | 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/4278 | Which of the following best describes an ecosystem in a California tide pool? | [
"a school of fluffy sculpins",
"the giant green anemones, the ochre sea stars, and the red octopuses",
"the rocks, the salt water, and the California mussels"
] | 2 | Read the passage. Then answer the question below.
In a tide pool in California, California mussels live up high on the rocks. They are only submerged during high tide, when the water level is the highest.
Giant green anemones and ochre sea stars live lower in the tide pool. They are submerged during high tide but expo... | closed choice | grade7 | natural science | biology | Ecosystems | Describe populations, communities, and ecosystems | In an environment, organisms interact with each other and with their nonliving surroundings. To help describe these interactions, ecologists use specific terms for different types of groups.
A single organism is an individual. Individuals of the same species that live in the same place are part of a population.
Multipl... | |
train/4279 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/4280 | Which of these states is farthest east? | [
"Alabama",
"Illinois",
"Arizona",
"Nebraska"
] | 0 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Alabama is farthest east. | |
train/4281 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, and the particles in both samples have the same average speed. So, the particles in both samples have the same average kinetic energy.
Because the particles in both samples have the same average kinetic energy, the samples must have the same temperature. |
train/4282 | Which of these states is farthest east? | [
"Mississippi",
"California",
"North Carolina",
"North Dakota"
] | 2 | 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. North Carolina is farthest east. | |
train/4283 | Which property matches this object? | [
"sour",
"salty"
] | 1 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A lemon has a sour taste. The pretzel is not sour.
Potato chips have a salty taste. The pretzel is salty. |
train/4284 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 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 north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/4285 | What is the capital of Nevada? | [
"Juneau",
"Las Vegas",
"Carson City",
"Denver"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Carson City is the capital of Nevada. | ||
train/4286 | What is the capital of Montana? | [
"Santa Fe",
"Carson City",
"Harrisburg",
"Helena"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Helena is the capital of Montana. | ||
train/4287 | Select the organism in the same genus as the Canada lynx. | [
"Lynx lynx",
"Castor canadensis",
"Camellia japonica"
] | 0 | 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.
Castor canadensis and Lynx canadensis are not in the same genus.
These organisms are not in the same genus, but part of their scientific names is the same. Castor canadensis and Lynx canadensis have the same species name ... |
train/4288 | Is the following statement about our solar system true or false?
Jupiter's volume is more than 1,000 times as great as Earth's volume. | [
"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. | To determine if this statement is true, calculate the value of 1,000 times the volume of Earth.
Then compare the result to the volume of Jupiter. Jupiter's volume is 1,431,280 billion km^3, which is more than 1,090,000 billion km^3. So, Jupiter's volume is more than 1,000 times as great as Earth's volume. |
train/4289 | What is the capital of Colorado? | [
"Boulder",
"Carson City",
"Denver",
"Helena"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/4290 | Which statement describes the Great Basin Desert ecosystem? | [
"It has warm summers and mild winters.",
"It has long, cold winters.",
"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 long, cold winter... |
train/4291 | What is the name of the colony shown? | [
"New Jersey",
"New York",
"Iowa",
"Florida"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is New York.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | ||
train/4292 | Which property matches this object? | [
"scratchy",
"blue"
] | 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 scratchy object is rough and itchy against your skin. The log is scratchy.
Blue is a color.
This color is blue. The log is not blue. |
train/4293 | Complete the statement.
Sodium bromide is (). | [
"a compound",
"an elementary substance"
] | 0 | The model below represents sodium bromide. Sodium bromide can be used to kill bacteria in swimming pools. | closed choice | grade7 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | Use the model to determine whether sodium bromide is an elementary substance or a compound.
Step 1: Interpret the model.
.
Use the legend to determine the chemical element represented by each color. The colors and atomic symbols from the legend are shown in the table below. The table also includes the names of the chem... |
train/4294 | Which is this organism's common name? | [
"curlyhair tarantula",
"Brachypelma albopilosum"
] | 0 | This organism is Brachypelma albopilosum. It is also called a curlyhair tarantula. | closed choice | grade8 | 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,... | Brachypelma albopilosum is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Brachypelma albopilosum is the organism's scientific name. So, you know that curlyhair tarantula is the common name. |
train/4295 | What type of rock is siltstone? | [
"metamorphic",
"sedimentary"
] | 1 | Siltstone is a type of rock. It forms from silt, a fine sediment with grains that are smaller than sand. Siltstone forms when layers of silt are pressed together to form rock. | closed choice | grade3 | 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 to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when a rock is chang... | Siltstone is a sedimentary rock. Like other sedimentary rocks, it forms from layers of sediment.
Silt is a type of sediment. It is found in places like river valleys. Sediments like silt can build up in layers. Over time, the top layers press down on the bottom layers. Sedimentary rock forms when the bottom layers are ... |
train/4296 | What is the name of the colony shown? | [
"New York",
"Massachusetts",
"Mississippi",
"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/4297 | What is the capital of Arkansas? | [
"Little Rock",
"Fayetteville",
"Tulsa",
"Atlanta"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Little Rock is the capital of Arkansas. | ||
train/4298 | Look at the models of molecules below. Select the elementary substance. | [
"silane",
"chlorine",
"dichloromethane"
] | 1 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/4299 | Which material is this parachute made of? | [
"styrofoam",
"nylon"
] | 1 | closed choice | grade2 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the parachute.
The parachute is made of nylon.
Nylon is a light, strong material. Parachutes are made of nylon because it does not tear easily. Nylon is also used to make tents for camping. |
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