Conservation of Energy and Energy Transformation

The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

• solar

• light

• thermal

• mechanical

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The skater starts 8 meters above the ground. At which height on the ramp does the skater's total energy change ?

• 8 meters

• 4 meters

• 2 meters

• The skater's total energy doesn't change.

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Is energy always conserved?

• Always

• Often

• Never

• Sometimes

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The picture showing the energy conversion

Chemical → radiant and thermal is:

• 
• 
• 
• 

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How are different forms of energy related?

• they can all be transformed into other forms of energy

• none of them can be transformed into other forms of energy

• they can be created

• they can be destroyed

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According to the Law of Conservation of Energy, when one form of energy is transformed into another, __________ energy is lost in the process

• no

• some

• all

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A change from one form of energy to another

• energy conservation

• energy transformation

• potential energy

• kinetic energy

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As an object falls its __________ energy decreases and its kinetic energy increases

• potential

• chemical

• thermal

• electric

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CANNOT be created or destroyed

• energy

• transformation

• motion

• pendulums

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Whenever a moving object experiences friction, some of its kinetic energy is transformed into __________ energy.

• thermal

• electrical

• nuclear

• mechanical

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