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WorksheetsEnergy
Total questions: 40
Worksheet time: 40mins
A student places a battery into a flashlight. When the student switches the flashlight on, a complete circuit is made, and the light bulb lights up. When the student switches the flashlight off, the circuit is no longer complete, and the light bulb goes out. Is energy being transferred electrically from the battery to the light bulb in the flashlight? Why or why not?
No, because energy cannot be transferred electrically from one place to another
No, because even though energy can be transferred electrically, it cannot be transferred from a battery
Yes, but only when the flashlight is switched on because energy can be transferred electrically only when there is a complete circuit
Yes, as long as the battery is in the flashlight because electrical sources, such as batteries, transfer energy to electrical devices, such as flashlights, all the time
A girl moves Magnet A close to Magnet B as shown above. When Magnet A is a certain distance from Magnet B, Magnet B begins to move toward Magnet A. The speed of Magnet B increases as it moves toward Magnet A. Is energy transferred while Magnet B moves toward Magnet A?
No, energy is not transferred because magnets do not transfer energy unless they touch.
No, energy is not transferred because magnets do not have any energy.
Yes, energy is transferred because there is a change in speed.
Yes, energy is transferred, but the transfer of energy is not related to the change in speed.
Consider the following situations:
Situation 1: A battery is used to power a cell phone.
Situation 2: The sun shines on a plant.
Is energy being transferred in either of these situations?
Energy is transferred in both situations.
Energy is NOT transferred in either situation.
Energy is transferred in Situation 1, but energy is NOT transferred in Situation 2.
Energy is transferred in Situation 2, but energy is NOT transferred in Situation 1.
A repairman uses a tuning fork, like the one shown below, to tune a piano. He hits the tuning fork against the edge of a table. The tuning fork begins to vibrate. The vibrating tuning fork makes a specific sound, and the repairman adjusts the piano until it makes the same sound when played. After a while, the tuning fork stops vibrating, and the sound stops.
What happens to the energy of the tuning fork as the vibrations of the tuning fork slow down and eventually stop?
Some of the energy is destroyed by the sound.
Some of the energy is transferred to the surrounding air.
Nothing happens to the energy because sound is not related to energy.
The energy runs out because the force that was given to the tuning fork runs out.
The figure below shows two identical rocks. The rock on the left is falling, while the rock on the right is sitting on a cliff.
Does either rock have energy?
The falling rock has energy because it is moving, and things that move have energy. The rock on the cliff does not have energy because it is not moving.
The rock on the cliff has energy because it has energy stored inside of it. The falling rock does not have energy because it gave off its energy when it started to fall.
Neither rock has energy because rocks are not alive, and only living things have energy.
Both rocks have energy because all things have energy.
A person hits a musical instrument called a triangle. When it is hit, the triangle starts to vibrate, and a sound is produced. After a while, the vibration and sound stop. How does the energy of the triangle change and why?
The energy of the triangle decreases the entire time. Some energy is destroyed as the person hits the triangle, and some energy is transferred away from the triangle by sound.
The energy of the triangle increases the entire time. Energy is transferred to the triangle as the person hits the triangle, and no energy is transferred away from the triangle by sound.
The energy of the triangle increases when it is hit, and then the energy decreases. Energy is transferred from the person to the triangle as the person hits it, and then energy is transferred away from the triangle by sound after the person stops hitting it.
The energy of the triangle does not change during this process. Energy is not transferred to the triangle when the person hits it, and energy is not transferred away from the triangle by sound.
Two girls are playing with two paper airplanes that are exactly the same. The girls stand the same distance from a wall and throw the airplanes toward the wall at different speeds. The first girl throws her airplane faster than the second girl. As the airplanes are flying, which one has more energy and why?
The faster airplane has more energy because if two things are exactly the same, the faster one will always have more energy.
The slower airplane has more energy because it takes longer to hit the wall, and the amount of energy a thing has increases as it is moving.
The airplanes have the same amount of energy because they are exactly the same type of airplane.
The airplanes have the same amount of energy because they are flying the same distance.
Consider the following situations:
Situation 1: A person comes in contact with cold air.
Situation 2: An electric generator is used to run a motor.
Is energy being transferred in either of these situations?
Energy is transferred in both situations.
Energy is NOT transferred in either situation.
Energy is transferred in Situation 1, but energy is NOT transferred in Situation 2.
Energy is transferred in Situation 2, but energy is NOT transferred in Situation 1.
A woman picks up a laptop computer and notices that the bottom of it feels cool. She turns on the laptop and works on it for an hour. Then she turns it off and picks it up again.
Will the bottom of the laptop be warmer or cooler after being on for an hour?
The bottom of the laptop will be a little cooler after being on for an hour.
The bottom of the laptop will be the same after being on for an hour.
The bottom of the laptop will be a little warmer after being on for an hour.
Whether the bottom of the laptop will be warmer or cooler depends on how much she used it during that hour.
A player rolls Ball A toward Ball B as pictured in Figure 1. Then Ball A hits Ball B. Both balls continue to roll after the collision as shown in Figure 2.
Which of the following statements correctly describes Ball A’s speed in Figure 2 compared to its speed in Figure 1?
Ball A is moving faster in Figure 2 because it gained energy from hitting Ball B.
Ball A is moving slower in Figure 2 because it transferred energy to Ball B when the balls hit each other.
Ball A is moving slower in Figure 2 because some energy was destroyed when the balls hit each other.
Ball A is moving at the same speed because no energy was transferred when the balls hit each other.
Two classes put plants in clay pots. The pots and plants are exactly the same, and they each have the same amount of dirt and water. One class hangs its pot outside the window on the first floor of the school. The other class hangs its pot outside the window on the second floor of the school.
Does the clay pot that is hanging outside the second floor window have more energy than the clay pot that is hanging outside the first floor window? Why or why not?
Yes, the pot that is hanging outside the second floor window has more energy because it is higher above the ground.
Yes, the pot that is hanging outside the second floor window has more energy because it is more likely to fall.
No, both pots have the same amount of energy because they are exactly the same.
No, both pots have no energy because they are not moving.
The air in the room pictured is cool. A fire is warming the air near the fireplace. There is a fan next to the fireplace.
If a person turns on the fan to blow the warmer air across the room, will the air at the other end of the room get any warmer? Why or why not?
No, because fans are only used to cool a room, they cannot be used to warm a room.
No, because all of the air in a room is the same temperature, a blowing fan will not change the air temperature.
Yes, because a fan can blow warmer air across a room, which makes the other end of the room warmer.
It depends on the temperature of the air being blown by the fan. The air at the other end of a room will get warmer only if the air near the fire is a lot warmer than the air at the other end of the room.
A child has a spring. She wants to see how high she can make the spring jump into the air. First she pushes the spring down just a little bit and lets it go. Then she pushes the spring down as far as she can and lets it go. For each try, she watches the spring jump and measures how high the spring went.
Did the spring jump higher on the first or second try? Why?
The spring jumped higher on the first try because it was only pushed down a little bit.
The spring jumped higher on the second try because it was pushed down more than on the first try.
The spring jumped the same height on both tries because it is the same spring.
More information is needed because how high a spring jumps does not depend on how much it is pushed down.
A person shines a light directly on to a fish bowl so that he can see the fish better. The fish bowl and the water start out at the same temperature as the air in the room.
What will happen to the temperature of the water in the fish bowl as the light shines on it?
The water in the fish bowl will get a little warmer although it may be hard to notice.
The water in the fish bowl will get a little cooler although it may be hard to notice.
The water in the fish bowl will stay the same. It will not get warmer or cooler.
Whether the water gets a little warmer, a little cooler, or stays the same depends on how cold the water is before the lamp is turned on.
A man takes a cookie out of a hot oven. He places the hot cookie on a cool plate. What will happen to the temperature of the plate and the cookie?
The plate will get warmer, and the cookie will get cooler until they are both the same temperature.
The plate will get warmer, and the cookie will get cooler, but they will never be the same temperature.
The plate will stay the same temperature, and the cookie will get cooler until it is the same temperature as the plate.
The plate will stay the same temperature, and the cookie will get cooler, but they will never be the same temperature.
A student flattens out an area of sand at the playground and then he drops a ball into the sand. He notices that the ball makes a dent in the sand. Next, he wants to see if throwing the ball from the same height into a new spot in the sand will make a deeper dent. When will the ball make the deeper dent and why?
The ball will make a deeper dent when it is dropped because it takes longer to fall.
The ball will make a deeper dent when it is thrown because it is moving faster.
The dent will be the same if the ball is dropped or thrown because it is the same ball each time.
The dent will be the same if the ball is dropped or thrown because it is traveling the same distance each time.
Two carts are rolling on a smooth flat surface. Cart A is rolling faster than Cart B and hits the back of Cart B.
After Cart A hits Cart B, both carts continue rolling forward. Each cart is going a different speed than it was before. Was energy transferred from Cart A to Cart B?
No, Cart A does not have any energy to transfer.
No, energy is not transferred when two objects hit each other.
Yes, the change in speed is a sign that energy was transferred.
Yes, energy was transferred, but the change in speed is not related to the transfer of energy.
Consider the following situations:
Situation 1: A person touches a cold piece of metal.
Situation 2: A lamp shines light on a table.
Is energy being transferred in either of these situations?
Energy is transferred in both situations.
Energy is NOT transferred in either situation.
Energy is transferred in Situation 1, but energy is NOT transferred in Situation 2.
Energy is transferred in Situation 2, but energy is NOT transferred in Situation 1.
A student has two blocks. One block is warmer than the other block. If the student stacks the warmer block on top of the cooler block, what will happen to the temperature of the blocks?
The cooler block will stay the same temperature, and the warmer block will get cooler until it is the same temperature as the cooler block.
The warmer block will stay the same temperature, and the cooler block will get warmer until it is the same temperature as the warmer block.
The warmer block will get cooler and the cooler block will get warmer until both blocks are at the same temperature.
The warmer block will get cooler and the cooler block will get warmer, but they will never be the same temperature.
Which of the objects in the figure above has energy?
Only the rock, because the rock is moving
Only the light bulb, because it is giving off light
Only the speaker and light bulb, because they are using electricity
All three objects, because all objects have energy
A river flows into a lake. The river water is warm, and the lake water is cold. What happens to the temperature of the lake water when the warm river water flows into the lake?
The lake water will get cooler.
The lake water will get warmer.
The lake water will not change temperature.
The lake water will only change temperature if the river water is much warmer than the lake water.
A girl and a boy find two rubber bands that are exactly the same. They each stretch a rubber band between their fingers. The girl stretches her rubber band as far as she can without breaking it. The boy stretches his rubber band a little less than the girl.
After the rubber bands are stretched, which one has more energy and why?
The girl’s rubber band has more energy because it is stretched more than the boy’s rubber band.
The boy’s rubber band has more energy because it can still be stretched farther, but the girl’s rubber band is stretched as far as it can go.
Both rubber bands have the same amount of energy because the amount of energy a rubber band has is not related to how much it is stretched.
Neither one of the rubber bands has any energy because the rubber bands are not moving.
A radiator is a device used to heat up a room. When a student stands close to the radiator, he feels warm even though he is not touching the radiator.
What will happen if the student holds a blanket up so that the blanket is between himself and the radiator but not touching him?
He will feel warmer because blankets keep people warm.
He will feel cooler because the blanket is blocking the energy being given off by the radiator.
He will feel the same because holding the blanket up will not change the temperature of the air in the room.
He will feel the same because he will still receive the same amount of energy from the radiator even if the blanket is between himself and the radiator.
A boy puts batteries in a remote control so that he can play with a remote controlled car. He plays with the car for an hour. As the car moves around, the wheels of the car rub against the floor. After he is finished playing, he picks up the car.
Will the wheels and the remote control be warmer after the boy plays with them for an hour? Why or why not?
The remote control will be a little warmer because things that use batteries get warmer when you use them. The temperature of the wheels will not change.
The wheels will be a little warmer because things that move get warmer as parts of them rub against each other. The temperature of the remote control will not change.
The remote control will be a little warmer because it uses a battery, and the wheels will be a little warmer because they rubbed against the floor.
Neither the remote control nor the wheels will be warmer because things do not get warmer just by using batteries or by rubbing together.
A person watches a candle burn. As the candle burns, the person sees the light of the flame. The person also notices that the air around the flame is warmer. Is energy given off or is energy taken in by the candle while it burns?
Energy is taken in because the flame removes coldness from the air.
Energy is given off because the flame gives off light and heats the air.
Energy is not given off and not taken in because candles are not living things, and only living things give off or take in energy.
Energy is not given off and not taken in because the candle is not moving, and only things that are moving give off or take in energy.
A cook heats up some corn. Then she cuts a piece of cold butter and places it on top of the hot corn. What will happen to the temperature of the corn and the butter as soon as she puts the butter on top of the corn?
Both the corn and the butter will get cooler.
Both the corn and the butter will get warmer.
The corn will get cooler, and the butter will get warmer.
The corn will stay the same temperature, but the butter will get warmer.
An adult wants to heat up some water to make hot tea. He fills two tea kettles that are exactly the same with water and places them on the stove. While the kettles are on the stove, the temperature of the kettles and the water increases. When the kettles are very hot, the adult measures the temperature of each kettle. He finds that one kettle is hotter than the other.
Which tea kettle has more energy?
The hotter kettle has more energy because it has a higher temperature.
The cooler kettle has more energy because it hasn’t used up as much energy as the hotter kettle.
The kettles have the same amount of energy because they are both very hot.
The kettles have the same amount of energy because how much energy something has is not related to how hot it is.
Can the amount of energy a rock has change?
Yes, but the amount of energy something has can only change if a person moves it
Yes, there are a number of different ways the amount of energy something has can change, for example, by changing its motion or heating it.
No, because the amount of energy something has always stays the same no matter what is done to it
No, because non-living things do not have any energy
A person puts a bottle of juice in a refrigerator. The juice gets cooler while it is in the refrigerator. As the juice gets cooler, what happens to the amount of energy the juice has?
The amount of energy the juice has decreases as it gets cooler.
The amount of energy the juice has increases as it gets cooler.
Juice has the same amount of energy no matter what temperature it is.
Juice does not have energy.
A ball, starting from rest at Position 1, rolls back and forth along a curved track and eventually stops rolling. As the ball rolls along the curved track, the track and the ball get a little warmer.
How does the total energy of the ball and track system change as the ball rolls along the track? (Assume that no energy is transferred to or from the surroundings.)
The total energy of the ball and track system increases because new energy in the form of thermal energy is made as the ball rolls along the track.
The total energy of the ball and track system decreases because the ball loses all of its energy and eventually stops rolling, and the energy of the track stays the same.
The total energy of the ball and track system increases as the speed of the ball increases, and it decreases as the speed of the ball decreases, and the energy of the track stays the same.
The total energy of the ball and track system does not change because even though energy is transferred between the ball and track, no energy was added to or released from the ball and track system.
A student has two blocks made of the same type of wood. The wooden blocks are both at the same temperature, but Block 1 weighs more than the Block 2.
Which block has more thermal energy and why?
Block 1 has more thermal energy because it weighs more.
Block 2 has more thermal energy because it weighs less.
Both blocks have the same amount of thermal energy because they are at the same temperature.
Neither block has any thermal energy because they are not living things.
A person wants to find out where to put his hands so that a candle will warm them as quickly as possible. He thinks that the best place to put his hands is where the most energy is transferred from the candle to his hands.
Will there be more energy transferred from the flame to his hand when it is above the flame compared to when it is next to the flame? Why or why not?
No, the same amount of energy will be transferred to his hand whether it is above the flame or next to the flame because the flame radiates energy equally in all directions.
Yes, more energy will be transferred to his hand when it is above the flame because in addition to the energy that is radiated by the flame, energy is also transferred by the movement of the warm air upward to his hand when it is above the flame.
No, more energy will be transferred to his hand when it is next to the flame because the same amount of energy will be transferred by the movement of warm air to his hand in both positions, but more energy will be radiated by the flame in the sideways direction than in the upward direction.
Yes, more energy will be transferred to his hand when it is above the flame because no energy is radiated by the flame. Energy from a flame is only transferred in an upward direction by the movement of warm air.
A rubber ball speeds up as it travels from Position 1 toward the floor. The ball is compressed as it hits the floor (Position 2) and then returns to its original shape as it bounces back up into the air (Position 3).
What happens to the elastic potential energy of the ball as it moves from Position 2 to Position 3?
New energy is made in the form of elastic potential energy.
The elastic potential energy of the ball is converted into kinetic energy (motion energy) and gravitational potential energy.
The elastic potential energy of the ball is used up. It is not converted into any other form of energy.
The elastic potential energy of a rubber ball cannot change, and, therefore, nothing happens to the elastic potential energy of the ball when it moves from Position 2 to Position 3.
In outer space, there is no air, only empty space between the stars and planets. Can energy be transferred by light and sound in outer space? Why?
Energy can be transferred by light and by sound in outer space because light and sound can both travel without air carrying them.
Energy can be transferred by light in outer space because light can travel without air carrying it, but energy cannot be transferred by sound because sound requires a medium such as air to carry it.
Energy can be transferred by sound in outer space because sound can travel without air carrying it, but energy cannot be transferred by light because light requires a medium such as air to carry it.
Energy cannot be transferred by light or sound in outer space because both light and sound require a medium such as air to carry them.
Do all things have thermal energy? Why or why not?
Yes, because thermal energy is the result of atoms rubbing together, and all things are made up of atoms that are rubbing together
Yes, because thermal energy is the result of atoms moving, and all things are made up of atoms that are moving
No, because only things that are warm or hot have thermal energy, and not all things are warm or hot
No, because only things that are living have thermal energy, and not all things are living
A child rolls a bowling ball down a flat lane toward a set of pins at a bowling alley. As the bowling ball rolls, it slows down.
When the bowling ball is traveling at half the initial speed, what will the kinetic energy (motion energy) of the bowling ball be?
The kinetic energy of the bowling ball will be half of what it was because the amount of kinetic energy an object has is directly proportional to its speed.
The kinetic energy of the bowling ball will be one fourth of what it was because the amount of kinetic energy an object has is directly proportional to the square of its speed.
The kinetic energy of the bowling ball will be double what it was because the amount of kinetic energy an object has is inversely proportional to its speed.
Even though the speed of the bowling ball is half of what it was, the kinetic energy of the bowling ball will stay the same because the amount of kinetic energy an object has is not related to the speed of a moving object.
A person pours a hot drink into a cup and then places a room temperature spoon in the cup. After a while, the person notices that the handle of the spoon has gotten hotter. What caused the handle to get hotter?
Heat molecules from the hot drink are absorbed by the spoon. These heat molecules travel to the handle of the spoon, making the handle hotter.
The molecules that make up the hot drink are rubbing against each other harder than the molecules that make up the spoon. The rubbing creates new energy that flows through the spoon to the handle, making the handle hotter.
The hot drink causes the molecules of the spoon to speed up. These faster moving molecules then move to the handle of the spoon, causing the handle to get hotter.
The hot drink causes the molecules of the spoon to speed up. When these faster moving molecules collide with slower moving molecules, energy is transferred to the slower moving molecules. These collisions continue to occur throughout the spoon until they reach the handle, making the handle hotter.
A child is playing with a wind-up toy car on a level surface. The child winds the car’s spring by using the wind-up key in the back of the car. A spring inside the car stores the energy the child has transferred to the car. As the spring is released, the elastic potential energy of the spring is converted into the kinetic energy (motion energy) of the car and thermal energy of the surrounding environment.
In the graphs below, Point A represents the time at which the child begins winding the toy. Point B represents the time at which the car was released and begins to travel across the floor. Point C is the time at which the car comes to a complete stop. Which of the following graphs correctly illustrates how concentrated the energy of the car is at each point?
Imagine two slides that are shaped differently but start and end at the same height above the ground as shown below. Two students slide down from the top of the two different slides starting from rest. The students weigh the same.
Which student has the greater speed at the bottom of the slide and why? (Assume no energy is transferred between the students and the slides or between the students and the air around them.)
The student on Slide 1 because that student traveled a longer distance, so there was more time for new energy in the form of kinetic energy (motion energy) to be made
The student on Slide 2 because that student initially encountered a steeper slope, so more new energy in the form of kinetic energy (motion energy) was made
The student on Slide 2 because that student traveled a shorter distance and did not lose as much kinetic energy (motion energy) or gravitational potential energy as the student on Slide 1
The students have the same speed because the only source of kinetic energy (motion energy) is the change in gravitational potential energy, and both students experienced the same change in gravitational potential energy.
A student would like to investigate the energy transfer between a magnet and a piece of magnetic metal. He places a block of iron on a table and positions a barrier in front of the block of iron. Next, he moves a magnet close to the block of iron on the table, as shown in Figure 1. He raises the barrier, and the iron block moves toward the magnet (Figure 2). The iron block then sticks to the magnet and comes to a rest (Figure 3).
In which figure is energy being transferred by the magnetic force to the iron block?
Energy is transferred in all of the figures because energy is transferred by a magnetic force whenever an iron object is close to a magnet.
Energy is transferred in Figures 2 and 3 because energy is transferred whenever a magnet exerts a force on an iron object.
Energy is transferred in Figure 2 because energy is transferred when a magnet exerts a force on an iron object and the position of the object changes.
Energy is not transferred in any of the figures because magnets can only transfer energy to other magnets.
