Energy Review

The ______ energy of an object increases with its height.

• Potential Energy
• Kinetic Energy
• Mechanical Energy
• Thermal Energy

An object that has kinetic energy must be

• lifted above Earth’s surface

• in motion

• at rest

• changing direction

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The law of (a)   states that energy in a system can change forms but can never be created or destroyed.

• conservation of energy

• consecration of energy

• conversion of energy

• construction of energy

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The kinetic energy of an object increases as its increases.

• height

• speed
• volume

• potential energy

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How much force is required to lift a rock a vertical distance of 8 m if 80 J of work were done?

• 80 J

• 80 N

• 10 J

• 10 N

When a ball is dropped it bounces until it eventually stops. Why does this happen?

• Some of the ball’s energy is lost.

• Some of the ball’s energy is converted to other forms, such as thermal and sound.

• All of the ball’s energy is eventually converted to potential energy when the ball stops bouncing.

• All of the ball’s energy is eventually converted to kinetic energy when the ball stops bouncing.

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Energy stored in food would be considered

• chemical potential

• kinetic

• thermal

• gravitational potential

Conduction is the transfer of heat energy by (a)   .

• direct particle contact

• electromagnetic waves

• density differences

• movement through a vacuum

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An example of an energy conversion from kinetic to thermal energy would be

• friction

• television

• flower

• gravity

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Green plants convert light energy from the sun into (a)   during photosynthesis.

• gravitational potential energy

• chemical potential energy

• thermal energy

• mechanical energy

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