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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the most thermal energy? Choose from: a 350-gram mug of cider at a temperature of 75°C, a 350-gram mug of cider at a temperature of 54°C, a 350-gram mug of cider at a temperature of 53°C. | All three mugs of cider have the same mass but different temperatures. Since the 75°C mug of cider is the hottest, it has the most thermal energy. | [
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Answer the question truthfully. | Compare the motion of two bats. Which bat was moving at a lower speed? Choose from: a bat that moved 95kilometers in 5hours, a bat that moved 115kilometers in 5hours. | Look at the distance each bat moved and the time it took to move that distance.
One bat moved 95 kilometers in 5 hours.
The other bat moved 115 kilometers in 5 hours.
Notice that each bat spent the same amount of time moving. The bat that moved 95 kilometers moved a shorter distance in that time. So, that bat must have moved at a lower speed. | [
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Answer the question truthfully. | A mom, a dad, and two kids are going for a walk. The mom and the dad each push one of the kids in a stroller. The strollers are the same. But the kids are different sizes. The mom and dad push the strollers at the same speed. Which stroller is pushed with a larger force? Choose from: a stroller with kid that weighs 25 pounds, a stroller with kid that weighs 30 pounds. | Look for the stroller that is heavier.
A stroller holding a kid that weighs 30 pounds is heavier than a stroller holding a kid that weighs 25 pounds. So, the stroller holding the kid that weighs 30 pounds needs to be pushed with a larger force to start moving forward at the same speed as the other other stroller. | [
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Answer the question truthfully. | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
A hockey stick is pushing on a hockey puck. According to Newton's third law, what other force must be happening? Choose from: The hockey puck is pulling on the hockey stick., The hockey puck is pushing on the hockey stick.. | The hockey stick is pushing on the hockey puck. So, Newton's third law tells you that the hockey puck is pushing on the hockey stick. | [
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has less thermal energy? Choose from: a bowl of oatmeal at a temperature of 35°C, a bowl of oatmeal at a temperature of 40°C. | The two bowls of oatmeal have the same mass but different temperatures. Since the 35°C bowl of oatmeal is colder than the 40°C bowl of oatmeal, it has less thermal energy. | [
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Answer the question truthfully. | Compare the motion of two mountain bikers. Which mountain biker was moving at a lower speed? Choose from: a mountain biker who moved 105miles in 10hours, a mountain biker who moved 90miles in 10hours. | Look at the distance each mountain biker moved and the time it took to move that distance.
One mountain biker moved 90 miles in 10 hours.
The other mountain biker moved 105 miles in 10 hours.
Notice that each mountain biker spent the same amount of time moving. The mountain biker who moved 90 miles moved a shorter distance in that time. So, that mountain biker must have moved at a lower speed. | [
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the least thermal energy? Choose from: a 150-gram glass of orange juice at a temperature of 57°F, a 150-gram glass of orange juice at a temperature of 55°F, a 150-gram glass of orange juice at a temperature of 59°F. | All three glasses of orange juice have the same mass but different temperatures. Since the 55°F glass of orange juice is the coldest, it has the least thermal energy. | [
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Answer the question truthfully. | Compare the motion of two ducks. Which duck was moving at a lower speed? Choose from: a duck that moved 755kilometers in 10hours, a duck that moved 970kilometers in 10hours. | Look at the distance each duck moved and the time it took to move that distance.
One duck moved 755 kilometers in 10 hours.
The other duck moved 970 kilometers in 10 hours.
Notice that each duck spent the same amount of time moving. The duck that moved 755 kilometers moved a shorter distance in that time. So, that duck must have moved at a lower speed. | [
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Answer the question truthfully. | Compare the motion of two sailboats. Which sailboat was moving at a lower speed? Choose from: a sailboat that moved 65kilometers in 5hours, a sailboat that moved 90kilometers in 5hours. | Look at the distance each sailboat moved and the time it took to move that distance.
One sailboat moved 65 kilometers in 5 hours.
The other sailboat moved 90 kilometers in 5 hours.
Notice that each sailboat spent the same amount of time moving. The sailboat that moved 65 kilometers moved a shorter distance in that time. So, that sailboat must have moved at a lower speed. | [
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Answer the question truthfully. | A shopper is buying food at the store. He fills two shopping bags. The shopping bags are the same size and shape. The shopper lifts each bag at the same speed. Which bag is lifted with a larger force? Choose from: a bag holding 7 pounds of food, a bag holding 3 pounds of food. | Look for the shopping bag that is heavier.
A shopping bag holding 7 pounds of food is heavier than a shopping bag holding 3 pounds of food. So, the bag holding 7 pounds needs a larger force to start moving upward at the same speed as the other bag. | [
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Answer the question truthfully. | An asteroid is flying directly toward Mars at a steady speed. Which statement describes the asteroid's motion? Choose from: The asteroid has a constant velocity., The asteroid is accelerating.. | The asteroid is moving in a straight line at a constant speed. So, the asteroid has a constant velocity. | [
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Answer the question truthfully. | Which would stretch more? Choose from: metal hair clip, gum. | Stretchy is a property. A stretchy material gets longer when you pull on it.
Look at each picture, one at a time. Imagine pulling on the material shown in each picture.
Of the choices, the gum would stretch more. If you pull on soft chewing gum, it will get longer. | [
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Answer the question truthfully. | Ariana is picking up her potted cactus as she cleans her room. She is pulling the cactus up with a force of 20N. Earth's gravity is pulling the cactus down with a force of 15N. Assume all other forces on the cactus are balanced. Which statement describes the forces on the cactus? Choose from: The forces are unbalanced, so there is a net force on the cactus., The forces are balanced, so there is no net force on the cactus.. | To determine if there is a net force on the cactus, look at the forces:
Ariana is pulling the cactus up with a force of 20 N.
Earth's gravity is pulling the cactus down with a force of 15 N.
The forces are in opposite directions, and the forces have different magnitudes: 20 N and 15 N. This means that the forces are unbalanced, so there is a net force on the cactus. | [
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Answer the question truthfully. | Select the solid. Choose from: piece of paper, rain, air inside a bubble. | Rain is a liquid. A liquid takes the shape of any container it is in. If you put rainwater into a bucket, the rainwater will take the shape of the bucket. But the rainwater will still take up the same amount of space.
The air inside a bubble is a gas. A gas spreads out to fill a space. The air inside a bubble fills all the space in the bubble. If the bubble pops, the air will spread out to fill a much larger space.
A piece of paper is a solid. You can fold a piece of paper. But it will still have a size and shape of its own. | [
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Answer the question truthfully. | Compare the motion of three ships. Which ship was moving at the highest speed? Choose from: a ship that moved 100miles south in 10hours, a ship that moved 385miles south in 10hours, a ship that moved 160miles west in 10hours. | Look at the distance each ship moved and the time it took to move that distance. The direction each ship moved does not affect its speed.
Notice that each ship moved for 10 hours. The ship that moved 385 miles moved the farthest distance in that time. So, that ship must have moved at the highest speed. | [
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Answer the question truthfully. | Which is softer? Choose from: cotton towel, wood ruler. | Soft is a property. A soft material changes shape when pressed or squeezed.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the cotton towel is softer. If you squeeze cotton fabric, it will change shape. | [
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Answer the question truthfully. | Compare the motion of two birds. Which bird was moving at a lower speed? Choose from: a bird that moved 15miles in 5hours, a bird that moved 5miles in 5hours. | Look at the distance each bird moved and the time it took to move that distance.
One bird moved 5 miles in 5 hours.
The other bird moved 15 miles in 5 hours.
Notice that each bird spent the same amount of time moving. The bird that moved 5 miles moved a shorter distance in that time. So, that bird must have moved at a lower speed. | [
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Answer the question truthfully. | A calico cat is asleep in a box. Earth's gravity is pulling down on the cat with a force of 40N. The bottom of the box is pushing up on the cat with a force of 40N. Assume all other forces on the cat are balanced. Which statement describes the forces on the cat? Choose from: The forces are unbalanced, so there is a net force on the cat., The forces are balanced, so there is no net force on the cat.. | To determine if there is a net force on the cat, look at the forces:
Earth's gravity is pulling the cat down with a force of 40 N.
The bottom of the box is pushing the cat up with a force of 40 N.
The forces are in opposite directions, and the forces have the same magnitude: 40 N. This means that the forces are balanced, so there is no net force on the cat. | [
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Answer the question truthfully. | Compare the motion of two speedboats. Which speedboat was moving at a lower speed? Choose from: a speedboat that moved 640miles in 10hours, a speedboat that moved 435miles in 10hours. | Look at the distance each speedboat moved and the time it took to move that distance.
One speedboat moved 435 miles in 10 hours.
The other speedboat moved 640 miles in 10 hours.
Notice that each speedboat spent the same amount of time moving. The speedboat that moved 435 miles moved a shorter distance in that time. So, that speedboat must have moved at a lower speed. | [
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Answer the question truthfully. | Select the liquid. Choose from: screwdriver, air inside a balloon, hammer, grape juice. | The air inside a balloon is a gas. A gas expands to fill a space. The air inside a balloon expands to fill all the space in the balloon. If the balloon pops, the air will expand to fill a much larger space.
Grape juice is a liquid. A liquid takes the shape of any container it is in. If you pour grape juice into a different container, the grape juice will take the shape of that container. But the grape juice will still take up the same amount of space.
A screwdriver is a solid. A solid has a size and shape of its own. This screwdriver has a metal blade and a plastic handle. Both metal and plastic are solids.
A hammer is a solid. A solid has a size and shape of its own. A hammer is made of iron and wood. Both iron and wood are solids. | [
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Answer the question truthfully. | Select the gas. Choose from: plate, air inside a soccer ball, baseball cap, ballet shoes. | The air inside a soccer ball is a gas. A gas expands to fill a space. The air fills all the space inside the soccer ball. If air leaks out, it will expand into the space around the ball.
A baseball cap is a solid. A solid has a size and shape of its own. If you put a baseball cap on your head, the baseball cap will still have a size and shape of its own.
A plate is a solid. If someone drops a plate, it may break into pieces. But each piece will still have a size and shape of its own.
A ballet shoe is a solid. A solid has a size and shape of its own. When a dancer wears a ballet shoe, it may bend a little. But the ballet shoe still has a size and shape of its own. | [
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has more thermal energy? Choose from: a 125-gram glass of grape juice at a temperature of 40°F, a 125-gram glass of grape juice at a temperature of 65°F. | The two glasses of grape juice have the same mass but different temperatures. Since the 65°F glass of grape juice is hotter than the 40°F glass of grape juice, it has more thermal energy. | [
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Answer the question truthfully. | Select the gas. Choose from: marbles, air inside a beach ball, pipe cleaner, baseball cap. | A baseball cap is a solid. A solid has a size and shape of its own. If you put a baseball cap on your head, the baseball cap will still have a size and shape of its own.
A pipe cleaner is a solid. You can easily bend a pipe cleaner. But it will still have a size and shape of its own.
A marble is a solid. A solid has a size and shape of its own. A marble can be made of clear or colored glass.
The air inside a beach ball is a gas. A gas expands to fill a space. The air fills all the space inside the beach ball. If air leaks out, it will expand into the space around the ball. | [
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Answer the question truthfully. | Compare the motion of three cars. Which car was moving at the lowest speed? Choose from: a car that moved 210miles west in 5hours, a car that moved 160miles north in 5hours, a car that moved 225miles south in 5hours. | Look at the distance each car moved and the time it took to move that distance. The direction each car moved does not affect its speed.
Notice that each car moved for 5 hours. The car that moved 160 miles moved the shortest distance in that time. So, that car must have moved at the lowest speed. | [
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Answer the question truthfully. | Two 20-gram pieces of rope are identical except for their temperatures. Which piece of rope has less thermal energy? Choose from: the colder piece of rope, the hotter piece of rope. | The two pieces of rope are made of the same material and have the same mass. So, the colder piece of rope has less thermal energy. | [
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Answer the question truthfully. | Which is stickier? Choose from: syrup, silk necktie. | Sticky is a property. A sticky material can stick to other things.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the syrup is stickier. If you touch syrup, it will stick to you. | [
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Answer the question truthfully. | Compare the motion of three bicycles. Which bicycle was moving at the lowest speed? Choose from: a bicycle that moved 115miles east in 10hours, a bicycle that moved 120miles west in 10hours, a bicycle that moved 280miles north in 10hours. | Look at the distance each bicycle moved and the time it took to move that distance. The direction each bicycle moved does not affect its speed.
Notice that each bicycle moved for 10 hours. The bicycle that moved 115 miles moved the shortest distance in that time. So, that bicycle must have moved at the lowest speed. | [
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0.376190096139907... |
Answer the question truthfully. | Compare the motion of three ships. Which ship was moving at the lowest speed? Choose from: a ship that moved 175kilometers south in 5hours, a ship that moved 215kilometers west in 5hours, a ship that moved 355kilometers north in 5hours. | Look at the distance each ship moved and the time it took to move that distance. The direction each ship moved does not affect its speed.
Notice that each ship moved for 5 hours. The ship that moved 175 kilometers moved the shortest distance in that time. So, that ship must have moved at the lowest speed. | [
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Answer the question truthfully. | Compare the motion of three motorboats. Which motorboat was moving at the highest speed? Choose from: a motorboat that moved 180kilometers east in 5hours, a motorboat that moved 360kilometers south in 5hours, a motorboat that moved 90kilometers east in 5hours. | Look at the distance each motorboat moved and the time it took to move that distance. The direction each motorboat moved does not affect its speed.
Notice that each motorboat moved for 5 hours. The motorboat that moved 360 kilometers moved the farthest distance in that time. So, that motorboat must have moved at the highest speed. | [
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... |
Answer the question truthfully. | Which is the scratchiest? Choose from: bark, nylon swim shorts, metal flute. | Scratchy is a property. A scratchy material is rough and itchy against your skin.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the bark is the scratchiest. If you could touch this tree bark, it would feel rough and itchy. | [
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Answer the question truthfully. | Read the text about a person in motion.
Logan hiked up a tall mountain. He followed a trail all the way to the summit. Complete the statement. Assume that Logan's mass did not change.
The gravitational potential energy stored between Logan and Earth () as he hiked toward the summit. Choose from: increased, decreased, stayed the same. | Think about how the distance between Logan and the center of Earth changed.
The summit of the mountain was higher than the point where Logan started hiking. As he hiked toward the summit, the distance between Logan and the center of Earth increased. So, the gravitational potential energy stored between Logan and Earth increased as he hiked toward the summit. | [
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Answer the question truthfully. | Two soccer balls are identical except for their temperatures. Which soccer ball has more thermal energy? Choose from: the colder soccer ball, the hotter soccer ball. | The two soccer balls are made of the same material and have the same mass. So, the hotter soccer ball has more thermal energy. | [
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the least thermal energy? Choose from: a stick of butter at a temperature of 60°F, a stick of butter at a temperature of 49°F, a stick of butter at a temperature of 43°F. | All three sticks of butter have the same mass but different temperatures. Since the 43°F stick of butter is the coldest, it has the least thermal energy. | [
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Answer the question truthfully. | Which is smoother? Choose from: book, bark. | Smooth is a property. A smooth material is not rough or bumpy.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the book is smoother. If you touch paper, it will not feel rough or bumpy. | [
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Answer the question truthfully. | Two basketballs are identical except for their thermal energies. Which basketball has a higher temperature? Choose from: the basketball with more thermal energy, the basketball with less thermal energy. | The two basketballs are made of the same material and have the same mass. So, the basketball with more thermal energy has a higher temperature. | [
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Answer the question truthfully. | Two cookies are identical except for their temperatures. Which cookie has more thermal energy? Choose from: the colder cookie, the hotter cookie. | The two cookies are made of the same material and have the same mass. So, the hotter cookie has more thermal energy. | [
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Answer the question truthfully. | Compare the motion of three ships. Which ship was moving at the lowest speed? Choose from: a ship that moved 230miles east in 10hours, a ship that moved 220miles south in 10hours, a ship that moved 240miles west in 10hours. | Look at the distance each ship moved and the time it took to move that distance. The direction each ship moved does not affect its speed.
Notice that each ship moved for 10 hours. The ship that moved 220 miles moved the shortest distance in that time. So, that ship must have moved at the lowest speed. | [
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... |
Answer the question truthfully. | Read the text about a person in motion.
Zach rode an escalator from the first floor to the second floor of a shopping mall. Complete the statement. Assume that Zach's mass did not change.
The gravitational potential energy stored between Zach and Earth () as he rode the escalator. Choose from: decreased, increased, stayed the same. | Think about how the distance between Zach and the center of Earth changed.
The second floor is higher than the first floor. As he rode the escalator toward the second floor, the distance between Zach and the center of Earth increased. So, the gravitational potential energy stored between Zach and Earth increased as he rode the escalator. | [
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... |
Answer the question truthfully. | Which is the stickiest? Choose from: jam, cardboard, nylon shorts. | Sticky is a property. A sticky material easily attaches to other things.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the jam is the stickiest. If you touch jam, it will stick to you. | [
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0... |
Answer the question truthfully. | Select the solid. Choose from: air inside a soccer ball, vinegar, water in a sink, ruler. | A ruler is a solid. A solid has a size and shape of its own. If you put a ruler in a box, the ruler will keep its shape.
The air inside a soccer ball is a gas. A gas expands to fill a space. The air fills all the space inside the soccer ball. If air leaks out, it will expand into the space around the ball.
Vinegar is a liquid. A liquid takes the shape of any container it is in. If you pour vinegar into a different container, the vinegar will take the shape of that container. But the vinegar will still take up the same amount of space.
The water in a sink is a liquid. A liquid takes the shape of any container it is in. If you move the water from a sink 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. | [
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0.10721054673194885,
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Answer the question truthfully. | Which is softer? Choose from: silk necktie, wood ruler. | Soft is a property. A soft material changes shape when pressed or squeezed.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the silk necktie is softer. If you press on silk fabric, it will change shape. | [
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... |
Answer the question truthfully. | Compare the motion of three ships. Which ship was moving at the lowest speed? Choose from: a ship that moved 190kilometers east in 5hours, a ship that moved 315kilometers west in 5hours, a ship that moved 325kilometers south in 5hours. | Look at the distance each ship moved and the time it took to move that distance. The direction each ship moved does not affect its speed.
Notice that each ship moved for 5 hours. The ship that moved 190 kilometers moved the shortest distance in that time. So, that ship must have moved at the lowest speed. | [
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0.5232860445976257... |
Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the most thermal energy? Choose from: a cherry pie at a temperature of 78°F, a cherry pie at a temperature of 73°F, a cherry pie at a temperature of 87°F. | All three cherry pies have the same mass but different temperatures. Since the 87°F pie is the hottest, it has the most thermal energy. | [
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0.3590421378612... |
Answer the question truthfully. | Which is the most flexible? Choose from: ice rink, silk necktie, glass marbles. | Flexible is a property. A flexible material can be bent without breaking easily.
Look at each picture, one at a time. Imagine bending the material shown in each picture.
Of the choices, the silk necktie is the most flexible. If you fold silk fabric, it will not break. | [
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Answer the question truthfully. | Two 15-gram pieces of rope are identical except for their temperatures. Which piece of rope has more thermal energy? Choose from: the hotter piece of rope, the colder piece of rope. | The two pieces of rope are made of the same material and have the same mass. So, the hotter piece of rope has more thermal energy. | [
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Answer the question truthfully. | Compare the motion of two birds. Which bird was moving at a higher speed? Choose from: a bird that moved 25kilometers in 5hours, a bird that moved 15kilometers in 5hours. | Look at the distance each bird moved and the time it took to move that distance.
One bird moved 25 kilometers in 5 hours.
The other bird moved 15 kilometers in 5 hours.
Notice that each bird spent the same amount of time moving. The bird that moved 25 kilometers moved a farther distance in that time. So, that bird must have moved at a higher speed. | [
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Answer the question truthfully. | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Logan is pulling on a full suitcase. According to Newton's third law, what other force must be happening? Choose from: The suitcase is pushing on Logan., The suitcase is pulling on Logan.. | Logan is pulling on the suitcase. So, Newton's third law tells you that the suitcase is pulling on Logan. | [
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Answer the question truthfully. | Compare the motion of two ships. Which ship was moving at a lower speed? Choose from: a ship that moved 350kilometers in 5hours, a ship that moved 245kilometers in 5hours. | Look at the distance each ship moved and the time it took to move that distance.
One ship moved 245 kilometers in 5 hours.
The other ship moved 350 kilometers in 5 hours.
Notice that each ship spent the same amount of time moving. The ship that moved 245 kilometers moved a shorter distance in that time. So, that ship must have moved at a lower speed. | [
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the least thermal energy? Choose from: an orange at a temperature of 17°C, an orange at a temperature of 12°C, an orange at a temperature of 19°C. | All three oranges have the same mass but different temperatures. Since the 12°C orange is the coldest, it has the least thermal energy. | [
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Answer the question truthfully. | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Robert is pulling on a full suitcase. According to Newton's third law, what other force must be happening? Choose from: The suitcase is pushing on Robert., The suitcase is pulling on Robert.. | Robert is pulling on the suitcase. So, Newton's third law tells you that the suitcase is pulling on Robert. | [
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Answer the question truthfully. | Compare the motion of three speedboats. Which speedboat was moving at the lowest speed? Choose from: a speedboat that moved 890kilometers west in 10hours, a speedboat that moved 880kilometers north in 10hours, a speedboat that moved 360kilometers west in 10hours. | Look at the distance each speedboat moved and the time it took to move that distance. The direction each speedboat moved does not affect its speed.
Notice that each speedboat moved for 10 hours. The speedboat that moved 360 kilometers moved the shortest distance in that time. So, that speedboat must have moved at the lowest speed. | [
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Answer the question truthfully. | Two movers are putting heavy boxes into their truck. The boxes are the same shape and size. Each mover lifts one box up into the truck at a time. The movers lift the boxes at the same speed. Which box is lifted with a larger force? Choose from: a box holding 23 pounds, a box holding 21 pounds. | Look for the box that is heavier.
A box holding 23 pounds is heavier than a box holding 21 pounds. So, the box holding 23 pounds needs a larger force to start moving upward at the same speed as the other box. | [
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0.0773863717913627... |
Answer the question truthfully. | Compare the motion of two buses. Which bus was moving at a higher speed? Choose from: a bus that moved 265kilometers in 5hours, a bus that moved 210kilometers in 5hours. | Look at the distance each bus moved and the time it took to move that distance.
One bus moved 265 kilometers in 5 hours.
The other bus moved 210 kilometers in 5 hours.
Notice that each bus spent the same amount of time moving. The bus that moved 265 kilometers moved a farther distance in that time. So, that bus must have moved at a higher speed. | [
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... |
Answer the question truthfully. | Which is the most flexible? Choose from: cardboard, brick path, wood board. | Flexible is a property. A flexible material can be bent without breaking easily.
Look at each picture, one at a time. Imagine bending the material shown in each picture.
Of the choices, the cardboard is the most flexible. If you gently twist cardboard, it will not tear easily. | [
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Answer the question truthfully. | Which is harder? Choose from: ice rink, clay ball. | Hard is a property. A hard material keeps its shape when you press on it with your finger.
Look at each picture, one at a time. Imagine pushing on the material shown in each picture.
Of the choices, the ice rink is harder. If you step on the ice at an ice rink, it will not change shape. | [
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... |
Answer the question truthfully. | Which is the smoothest? Choose from: nylon swim shorts, rock wall, sandpaper. | Smooth is a property. A smooth material is not rough or bumpy.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the nylon swim shorts are the smoothest. If you touch nylon fabric, it will not feel rough. | [
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Answer the question truthfully. | Select the solid. Choose from: oxygen, caramel sauce, ballet shoes, coffee. | Caramel sauce is a liquid. A liquid takes the shape of any container it is in. If you pour caramel sauce into a container, the caramel sauce will take the shape of that container. But the caramel sauce will still take up the same amount of space.
A ballet shoe is a solid. A solid has a size and shape of its own. When a dancer wears a ballet shoe, it may bend a little. But the ballet shoe still has a size and shape of its own.
Coffee is a liquid. A liquid takes the shape of any container it is in. If you pour coffee into a different container, the coffee will take the shape of that container. But the coffee will still take up the same amount of space.
Oxygen is a gas. A gas expands to fill a space. Oxygen can be stored in metal tanks. If oxygen leaks out of the tank, the oxygen will expand into the space around the tank. | [
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has more thermal energy? Choose from: a bowl of oatmeal at a temperature of 105°F, a bowl of oatmeal at a temperature of 75°F. | The two bowls of oatmeal have the same mass but different temperatures. Since the 105°F bowl of oatmeal is hotter than the 75°F bowl of oatmeal, it has more thermal energy. | [
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Answer the question truthfully. | Max is standing on a diving board at the pool. Earth's gravity is pulling down on Max with a force of 400N. The diving board is pushing up on Max with a force of 400N. Assume all other forces on Max are balanced. Which statement describes the forces on Max? Choose from: The forces are unbalanced, so there is a net force on Max., The forces are balanced, so there is no net force on Max.. | To determine if there is a net force on Max, look at the forces:
Earth's gravity is pulling Max down with a force of 400 N.
The diving board is pushing Max up with a force of 400 N.
The forces are in opposite directions, and the forces have the same magnitude: 400 N. This means that the forces are balanced, so there is no net force on Max. | [
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0.7591333985328674,
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Answer the question truthfully. | Read the text about an object in motion.
Trent rode his motorcycle from the bottom of a hill to the top of the hill. Complete the statement. Assume that the motorcycle's mass did not change.
The gravitational potential energy stored between the motorcycle and Earth () as Trent rode up the hill. Choose from: decreased, stayed the same, increased. | Think about how the distance between the motorcycle and the center of Earth changed.
The top of the hill is higher than the bottom of the hill. As Trent rode toward the top of the hill, the distance between the motorcycle and the center of Earth increased. So, the gravitational potential energy stored between the motorcycle and Earth increased as Trent rode up the hill. | [
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... |
Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the least thermal energy? Choose from: a crayon at a temperature of 26°C, a crayon at a temperature of 22°C, a crayon at a temperature of 30°C. | All three crayons have the same mass but different temperatures. Since the 22°C crayon is the coldest, it has the least thermal energy. | [
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0.1286480873823166,
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Answer the question truthfully. | The objects are made of the same type of matter. Two rocks have the same temperature but different masses. Which rock has less thermal energy? Choose from: the rock with more mass, the rock with less mass. | The two rocks have the same temperature and are made of the same type of matter. So, the rock with less mass has less thermal energy. | [
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Answer the question truthfully. | Two watermelons are identical except for their temperatures. Which watermelon has less thermal energy? Choose from: the colder watermelon, the hotter watermelon. | The two watermelons are made of the same material and have the same mass. So, the colder watermelon has less thermal energy. | [
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Answer the question truthfully. | Which is scratchier? Choose from: wood bat, burlap sack. | Scratchy is a property. A scratchy material is rough and itchy against your skin.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the burlap sack is scratchier. If you touch burlap, it will feel rough and itchy. | [
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Answer the question truthfully. | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Sebastian is pulling on a full suitcase. According to Newton's third law, what other force must be happening? Choose from: The suitcase is pushing on Sebastian., The suitcase is pulling on Sebastian.. | Sebastian is pulling on the suitcase. So, Newton's third law tells you that the suitcase is pulling on Sebastian. | [
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... |
Answer the question truthfully. | Two sticks of butter are identical except for their temperatures. Which stick of butter has less thermal energy? Choose from: the colder stick of butter, the hotter stick of butter. | The two sticks of butter are made of the same material and have the same mass. So, the colder stick of butter has less thermal energy. | [
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Answer the question truthfully. | Compare the motion of two sailboats. Which sailboat was moving at a lower speed? Choose from: a sailboat that moved 50kilometers in 5hours, a sailboat that moved 90kilometers in 5hours. | Look at the distance each sailboat moved and the time it took to move that distance.
One sailboat moved 50 kilometers in 5 hours.
The other sailboat moved 90 kilometers in 5 hours.
Notice that each sailboat spent the same amount of time moving. The sailboat that moved 50 kilometers moved a shorter distance in that time. So, that sailboat must have moved at a lower speed. | [
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... |
Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the least thermal energy? Choose from: a 100-gram mug of cider at a temperature of 152°F, a 100-gram mug of cider at a temperature of 139°F, a 100-gram mug of cider at a temperature of 132°F. | All three mugs of cider have the same mass but different temperatures. Since the 132°F mug of cider is the coldest, it has the least thermal energy. | [
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Answer the question truthfully. | Latrell is standing on a diving board at the pool. Earth's gravity is pulling down on Latrell with a force of 400N. The diving board is pushing up on Latrell with a force of 400N. Assume all other forces on Latrell are balanced. Which statement describes the forces on Latrell? Choose from: The forces are balanced, so there is no net force on Latrell., The forces are unbalanced, so there is a net force on Latrell.. | To determine if there is a net force on Latrell, look at the forces:
Earth's gravity is pulling Latrell down with a force of 400 N.
The diving board is pushing Latrell up with a force of 400 N.
The forces are in opposite directions, and the forces have the same magnitude: 400 N. This means that the forces are balanced, so there is no net force on Latrell. | [
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Answer the question truthfully. | Compare the motion of three ducks. Which duck was moving at the lowest speed? Choose from: a duck that moved 310kilometers north in 5hours, a duck that moved 365kilometers south in 5hours, a duck that moved 425kilometers west in 5hours. | Look at the distance each duck moved and the time it took to move that distance. The direction each duck moved does not affect its speed.
Notice that each duck moved for 5 hours. The duck that moved 310 kilometers moved the shortest distance in that time. So, that duck must have moved at the lowest speed. | [
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0.045449215918779... |
Answer the question truthfully. | Which is smoother? Choose from: rubber ballon, concrete sidewalk. | Smooth is a property. A smooth material is not rough or bumpy.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the rubber ballon is smoother. If you touch a rubber balloon, it will not feel rough or bumpy. | [
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0.12882418930530548,
0.6213299036026001,
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Answer the question truthfully. | Select the liquid. Choose from: thread, milk, air inside a tire, tortoise shell. | The air inside a tire is a gas. A gas expands to fill a space. The air in a tire expands to fill all the space inside the tire. If air leaks out, it will expand into the space around the tire.
Thread is a solid that can be bent or tangled. But it still has a size and shape of its own.
A tortoise shell is a solid. A solid has a size and shape of its own. A tortoise shell is made of a solid called keratin, just like your fingernails!
Milk is a liquid. A liquid takes the shape of any container it is in. If you pour milk into a different container, the milk will take the shape of that container. But the milk will still take up the same amount of space. | [
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0.49082350730895996,
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Answer the question truthfully. | Two students get ready to leave school. The students have the same rolling backpacks. Each student has different books in her backpack. The students start rolling their backpacks at the same speed. Which backpack is pulled with a larger force? Choose from: a backpack carrying 8 pounds, a backpack carrying 7 pounds. | Look for the backpack that is heavier.
A backpack carrying 8 pounds is heavier than a backpack carrying 7 pounds. So, the backpack carrying 8 pounds needs to be pulled with a larger force to start rolling at the same speed as the other backpack. | [
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0.38414469361305237,
0.24616378545761108,
-0.0432668626308441... |
Answer the question truthfully. | Select the solid. Choose from: grape juice, spoon, rain. | [
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Answer the question truthfully. | Select the liquid. Choose from: beads, lemonade, air inside a balloon, empty cup. | An empty cup is a solid. A solid has a size and shape of its own. When you fill a cup with water, the cup still has its own shape.
Each bead in the jar is a solid. If you put many beads into a bottle, they will take the shape of the bottle, as a liquid would. But be careful! Beads are not a liquid. Each bead still has a size and shape of its own.
The air inside a balloon is a gas. A gas expands to fill a space. The air inside a balloon expands to fill all the space in the balloon. If the balloon pops, the air will expand to fill a much larger space.
Lemonade is a liquid. A liquid takes the shape of any container it is in. If you pour lemonade into a cup, the lemonade will take the shape of the cup. But the lemonade will still take up the same amount of space. | [
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0.324380666017... |
Answer the question truthfully. | Compare the motion of three bicycles. Which bicycle was moving at the highest speed? Choose from: a bicycle that moved 35miles east in 5hours, a bicycle that moved 70miles north in 5hours, a bicycle that moved 135miles north in 5hours. | Look at the distance each bicycle moved and the time it took to move that distance. The direction each bicycle moved does not affect its speed.
Notice that each bicycle moved for 5 hours. The bicycle that moved 135 miles moved the farthest distance in that time. So, that bicycle must have moved at the highest speed. | [
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... |
Answer the question truthfully. | Select the solid. Choose from: air inside a balloon, wet paint, tent. | The air inside a balloon is a gas. A gas spreads out to fill a space. The air inside a balloon spreads out to fill all the space in the balloon. If the balloon pops, the air will spread out to fill a much larger space.
A tent is a solid. You can fold a tent or spread it out. But it will still have a size and shape of its own.
Wet paint is a liquid. A liquid takes the shape of any container it is in. If you pour wet paint out of a can, the paint will change shape. But the wet paint will still take up the same amount of space. | [
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... |
Answer the question truthfully. | Select the solid. Choose from: caramel sauce, coffee, air from a hair dryer, ring. | Caramel sauce is a liquid. A liquid takes the shape of any container it is in. If you pour caramel sauce into a container, the caramel sauce will take the shape of that container. But the caramel sauce will still take up the same amount of space.
Coffee is a liquid. A liquid takes the shape of any container it is in. If you pour coffee into a different container, the coffee will take the shape of that container. But the coffee will still take up the same amount of space.
A ring is a solid. A solid has a size and shape of its own. A ring keeps its shape, even when you take it off your finger.
The air from a hair dryer is a gas. A gas expands to fill a space. A hair dryer uses a fan to blow warm air out. When the air leaves the hair dryer, the air expands to fill a much large space. | [
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... |
Answer the question truthfully. | Which would stretch the most? Choose from: concrete sidewalk, ceramic flower pot, rubber ballon. | Stretchy is a property. A stretchy material gets longer when you pull on it.
Look at each picture, one at a time. Imagine pulling on the material shown in each picture.
Of the choices, the rubber ballon would stretch the most. If you gently pull on a rubber balloon, it will get longer. | [
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Answer the question truthfully. | Compare the motion of three motorboats. Which motorboat was moving at the lowest speed? Choose from: a motorboat that moved 185kilometers west in 5hours, a motorboat that moved 165kilometers north in 5hours, a motorboat that moved 120kilometers south in 5hours. | Look at the distance each motorboat moved and the time it took to move that distance. The direction each motorboat moved does not affect its speed.
Notice that each motorboat moved for 5 hours. The motorboat that moved 120 kilometers moved the shortest distance in that time. So, that motorboat must have moved at the lowest speed. | [
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0.5549829602241516,
... |
Answer the question truthfully. | Which is the hardest? Choose from: silk kimono, jam, wood chair. | Hard is a property. A hard material keeps its shape when you press on it with your finger.
Look at each picture, one at a time. Imagine pushing on the material shown in each picture.
Of the choices, the wood chair is the hardest. If you squeeze a piece of wood, it will not change shape. | [
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Answer the question truthfully. | Two donkeys pull carts from the farmhouse to the yard. The carts are the same. Each cart is holding different tools. The donkeys move the carts at the same speed. Which cart is pulled with a larger force? Choose from: a cart holding 63 pounds, a cart holding 76 pounds. | Look for the cart that is heavier.
A cart holding 76 pounds is heavier than a cart holding 63 pounds. So, the cart holding 76 pounds needs a larger force to start moving at the same speed as the other cart. | [
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Answer the question truthfully. | Which is the hardest? Choose from: metal horseshoe, burlap sack, rubber gloves. | Hard is a property. A hard material keeps its shape when you press on it with your finger.
Look at each picture, one at a time. Imagine pushing on the material shown in each picture.
Of the choices, the metal horseshoe is the hardest. If you squeeze a metal horseshoe, it will not change shape. | [
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Answer the question truthfully. | Compare the motion of two geese. Which goose was moving at a higher speed? Choose from: a goose that moved 625miles in 10hours, a goose that moved 550miles in 10hours. | Look at the distance each goose moved and the time it took to move that distance.
One goose moved 625 miles in 10 hours.
The other goose moved 550 miles in 10 hours.
Notice that each goose spent the same amount of time moving. The goose that moved 625 miles moved a farther distance in that time. So, that goose must have moved at a higher speed. | [
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... |
Answer the question truthfully. | Owen is standing on a diving board at the pool. Earth's gravity is pulling down on Owen with a force of 400N. The diving board is pushing up on Owen with a force of 400N. Assume all other forces on Owen are balanced. Which statement describes the forces on Owen? Choose from: The forces are unbalanced, so there is a net force on Owen., The forces are balanced, so there is no net force on Owen.. | To determine if there is a net force on Owen, look at the forces:
Earth's gravity is pulling Owen down with a force of 400 N.
The diving board is pushing Owen up with a force of 400 N.
The forces are in opposite directions, and the forces have the same magnitude: 400 N. This means that the forces are balanced, so there is no net force on Owen. | [
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Answer the question truthfully. | Two 225-gram glasses of grape juice are identical except for their thermal energies. Which glas of grape juice has a lower temperature? Choose from: the glass of grape juice with less thermal energy, the glass of grape juice with more thermal energy. | The two glasses of grape juice are made of the same material and have the same mass. So, the glass of grape juice with less thermal energy has a lower temperature. | [
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Answer the question truthfully. | Which is the hardest? Choose from: wax crayons, soap, cotton apron. | Hard is a property. A hard material keeps its shape when you press on it with your finger.
Look at each picture, one at a time. Imagine pushing on the material shown in each picture.
Of the choices, the wax crayons are the hardest. If you squeeze wax crayons, they will not change shape. | [
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0.... |
Answer the question truthfully. | The objects are identical except for their temperatures. Which object has more thermal energy? Choose from: a 150-gram glass of water at a temperature of 85°F, a 150-gram glass of water at a temperature of 40°F. | The two glasses of water have the same mass but different temperatures. Since the 85°F glass of water is hotter than the 40°F glass of water, it has more thermal energy. | [
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Answer the question truthfully. | Which is the scratchiest? Choose from: sandpaper, rubber balloons, ceramic tea cup. | Scratchy is a property. A scratchy material is rough and itchy against your skin.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the sandpaper is the scratchiest. If you touch a piece of sandpaper, it will feel rough and itchy. | [
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has less thermal energy? Choose from: a pot of spaghetti sauce at a temperature of 145°F, a pot of spaghetti sauce at a temperature of 185°F. | The two pots of spaghetti sauce have the same mass but different temperatures. Since the 145°F pot of spaghetti sauce is colder than the 185°F pot of spaghetti sauce, it has less thermal energy. | [
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... |
Answer the question truthfully. | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Marie's foot is pushing on her car's gas pedal. According to Newton's third law, what other force must be happening? Choose from: The gas pedal is pulling on Marie's foot., The gas pedal is pushing on Marie's foot.. | Marie's foot is pushing on the gas pedal. So, Newton's third law tells you that the gas pedal is pushing on Marie's foot. | [
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... |
Answer the question truthfully. | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Helen's foot is pushing on her car's gas pedal. According to Newton's third law, what other force must be happening? Choose from: The gas pedal is pulling on Helen's foot., The gas pedal is pushing on Helen's foot.. | Helen's foot is pushing on the gas pedal. So, Newton's third law tells you that the gas pedal is pushing on Helen's foot. | [
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0.09197556227445602,
0.13518472015857697,
-0.4136668741703033... |
Answer the question truthfully. | Two eggs are identical except for their temperatures. Which egg has less thermal energy? Choose from: the colder egg, the hotter egg. | The two eggs are made of the same material and have the same mass. So, the colder egg has less thermal energy. | [
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Answer the question truthfully. | Select the liquid. Choose from: crayons, slide, dish soap, coins. | A coin is a solid. A solid has a size and shape of its own. Many coins are made of solid metal.
A crayon is a solid. You can break a crayon into pieces. But each piece will still have a size and shape of its own.
Dish soap is a liquid. A liquid takes the shape of any container it is in. If you pour dish soap out of a bottle, the dish soap will change shape. But the dish soap will still take up the same amount of space.
A slide is a solid. A solid has a size and shape of its own. A slide has a size and shape of its own, even when you sit on it. | [
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0.15257158875465393,
-0.6125332117080688,
0.46909385919570923,
... |
Answer the question truthfully. | Two bowls of oatmeal are identical except for their thermal energies. Which bowl of oatmeal has a lower temperature? Choose from: the bowl of oatmeal with less thermal energy, the bowl of oatmeal with more thermal energy. | The two bowls of oatmeal are made of the same material and have the same mass. So, the bowl of oatmeal with less thermal energy has a lower temperature. | [
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0.22808118164539337,
-0.6587122678756714,
-0.66259938478469... |
Answer the question truthfully. | Compare the motion of two bats. Which bat was moving at a higher speed? Choose from: a bat that moved 165kilometers in 10hours, a bat that moved 130kilometers in 10hours. | Look at the distance each bat moved and the time it took to move that distance.
One bat moved 165 kilometers in 10 hours.
The other bat moved 130 kilometers in 10 hours.
Notice that each bat spent the same amount of time moving. The bat that moved 165 kilometers moved a farther distance in that time. So, that bat must have moved at a higher speed. | [
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0.3358706831932068,
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Answer the question truthfully. | The objects are identical except for their temperatures. Which object has the least thermal energy? Choose from: a brownie at a temperature of 31°C, a brownie at a temperature of 23°C, a brownie at a temperature of 30°C. | All three brownies have the same mass but different temperatures. Since the 23°C brownie is the coldest, it has the least thermal energy. | [
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0.46558818221092224,
0.3595629632472992,
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-0.650137424468994... |
Answer the question truthfully. | Compare the motion of three ships. Which ship was moving at the lowest speed? Choose from: a ship that moved 290miles east in 10hours, a ship that moved 310miles south in 10hours, a ship that moved 280miles east in 10hours. | Look at the distance each ship moved and the time it took to move that distance. The direction each ship moved does not affect its speed.
Notice that each ship moved for 10 hours. The ship that moved 280 miles moved the shortest distance in that time. So, that ship must have moved at the lowest speed. | [
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0.378449499607086... |
Answer the question truthfully. | Which is the smoothest? Choose from: metal trombone, burlap sack, asphalt road. | Smooth is a property. A smooth material is not rough or bumpy.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the metal trombone is the smoothest. If you touch a metal trombone, it will not feel rough. | [
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Answer the question truthfully. | Which is the hardest? Choose from: ice rink, linen handkerchief, silk kimono. | Hard is a property. A hard material keeps its shape when you press on it with your finger.
Look at each picture, one at a time. Imagine pushing on the material shown in each picture.
Of the choices, the ice rink is the hardest. If you step on the ice at an ice rink, it will not change shape. | [
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0.5322694778442383,
0.6703063845634... |
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