Unit 9 Energy Review

In the world of science, which of the following does not meet the definition of work?

• Joe carries a 100 pound barbell to its storage rack, a distance of 3 meters.

• Joe lifts a 100 pound barbell about 1 meter above his head.

• Joe lowers the 100 pound barbell down about 2 meters to its slot in the rack.

• All of the answer choices are examples of work in the science world.

The rate that work is done (time taken to do work) is known as _____.

• Power

• Energy

• Efficiency

• Heat

_____ is defined as the ability of an object or phenomenon to cause a change in its environment.

• Power

• Energy

• Efficiency

• Heat

Potential energy is energy due to:

• The temperature of the object

• The speed of the object

• The height of the object

• The molecule motions inside the object

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Energy is neither created nor destroyed, just transformed from one type to another.  This is called:

• Newton's Second Law of Motion

• The Law of Presto Change-O

• The Law of Conservation of Energy

• The Second Law of Thermodynamics

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Which ball has the greatest potential energy?

• ball balanced on the roof of the science building

• ball balanced on the top of Mt. Everest

• ball balanced on a desk

• ball balanced on the floor

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NGSS.MS-PS3-2

A marble rolls along the track below with no friction. The track is suspended above the ground. At which position will it have the highest kinetic energy?

• 1

• 5

• 6

• 2

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NGSS.MS-PS3-5

Your teacher throws a ball up into the air.  As it travels upward, its kinetic energy:

• remain the same.

• Not enough information is given.

• increases.

• decreases.

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NGSS.MS-PS3-5

The sum of an object's kinetic energy and potential energy is known as its:

• specific heat

• mechanical energy

• radiant energy

• Work

While sitting next to a campfire, Susan noticed several different forms of energy being transformed from the potential energy of the wood. She correctly named all of the following forms of energy except:

• nuclear.

• radiant.

• chemical.

• thermal.