clickers review for energy transformations and heat transfer test

Clickers Review for Energy Transformations and Heat Transfer TEST

Please select a Team.

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1. Team 12. Team 2

What causes warm air to rise and cold air to sink?

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1. A difference in density

2. A difference in climate

3. A difference in weather

4. A difference in substance

60

Sally is roasting a marshmallow over a campfire on the end of a piece of wire. She knows that the

energy from the fire causes the molecules in the end of the wire that are closest to the fire to move

faster. These molecules transfer some of their extra kinetic energy to other molecules close by,

and these, in turn, affect still more molecules. Sally knows that this method of energy transfer is

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1. convection2. condensation3. radiation4. conduction 60

What sort of energy is found in the spring of a set mousetrap?

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1. Kinetic energy2. Potential energy3. Nuclear energy4. Chemical energy

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In the EduSmart lesson Maya rubbed her hands together when she was

cold. How could this energy transformation be written?

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1. Nuclear Chemical2. Physical Thermal3. Mechanical Thermal4. Electrical Chemical

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Jacob is standing with his back facing a campfire. He notices that his back

is much warmer than his chest. He knows that heat energy is being transferred from the fire and that this method of energy transfer can

happen even if no air is present. This method of energy transfer is —

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1. convection2. condensation3. conduction4. radiation

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Which of the following is an example of nuclear energy?

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1. A magnet picking up a paperclip

2. The sun shining3. Burning coal4. Steam turning a

turbine

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During energy transformations some energy is always transformed into …?

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1. Thermal energy2. Sound energy3. Mechanical energy4. Nuclear energy

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A weight hanging from the ceiling is an example of which state of energy?

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1. Potential energy2. Gravity energy3. Nuclear energy4. Kinetic energy

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Which of the following is an example of kinetic energy being converted to potential

energy?

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1. On a factory assembly line, boxes slide down a ramp.

2. The cord of a bow-and-arrow is released, propelling the arrow forward.

3. At an ice rink, an ice skater gives another ice skater a gentle push.

4. A bike rider stops pedaling and lets his bicycle coast up a hill. 60

A hot saucepan is placed on a cold bench. Heat will flow from the saucepan to the

bench until

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1. The bench is warmer than the saucepan2. The bench is as hot as the saucepan3. The saucepan has lost all heat4. The saucepan and the bench are the same

temperature

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Photosynthesis is the process by which green plants use solar

energy to convert simple substances into complex ones that

contain _____ energy.

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1. nuclear2. geothermal3. chemical4. heat

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Scientists have designed solar cells to trap solar energy and convert it to

_____ energy.

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1. hydroelectric2. wind3. electrical4. chemical

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Jason ate a granola bar and then went for a run. He ran one mile and sweat

heavily. Jason's body transformed chemical energy from the granola bar

into...

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1. electrical and sound energy. 2. mechanical and light energy. 3. mechanical and heat energy. 4. electrical and heat energy.

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A softball is dropped off of the side of a building. Ignore the effects of air

resistance. As the ball continues to fall freely, the kinetic energy of the ball

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1. remains the same. 2. equals zero. 3. decreases. 4. increases.

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The Cub Scouts are having their annual Pinewood Derby Race. The unpowered

soap box racers are lined up at the top of a hill and ready to begin. What gives the

cars their potential energy?

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1. their wheels 2. gravity 3. their speed 4. friction

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Study the diagram of the rollercoaster. Position A is the starting

point for the rollercoaster. At which position will the first rollercoaster car

have the most kinetic energy?

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1. A2. B3. C4. D

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The wax of a burning candle is a fuel that combines with oxygen in the air. As the

fuel is consumed, what happens to most of the energy stored in the bonds of the

wax?

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1. It is released as potential energy.

2. It stays in the wax. 3. It is released as heat and light. 4. It is destroyed along with the

wax. 60

Which statement is true about energy changes?

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1. Energy can be destroyed but not created.

2. Energy cannot be created or destroyed.

3. Energy can be created but not destroyed.

4. Energy can be created and destroyed.

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Bobby is drinking a cup of hot chocolate as he sits by a campfire on a chilly evening. He knows that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air

over his cup of hot chocolate expands and rises and is replaced by cooler, denser, air. This

method of energy transfer is-

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1. Convection2. Condensation3. Conduction4. Radiation

Countdown

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An ice cube is placed onto a hot pan that is sitting on the countertop. How will the heat energy move?

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1. The coldness will move from the pan to the ice cube.

2. The coldness will move from the ice cube to the pan

3. The heat will travel from the pan to the ice cube

4. The heat will move from the ice cube to the pan

Countdown

60

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