Energy 1

What is the total amount of kinetic energy in a substance?

• Potential energy
• Kinetic energy
• Thermal energy
• Temperature

When the temperature of matter decreases the particles ...

• speed up and move farther apart
• speed up and move closer together
• slow down and move farther apart
• slow down and move closer together

As an acorn falls from a tree, its gravitational potential energy

• increases

• decreases

As an acorn falls from a tree, its kinetic energy

• increases

• decreases

the gravitational potential energy equation is GPE = mgh, h stands for

• height

• displacement

• total distance

• momentum

The mechanical energy of a system of objects is

• the sum of all forms of energy.

• the sum of kinetic energy and elastic potential energy.

• the sum of kinetic energy and gravitational potential energy.

• the sum of kinetic energy and all relevant forms of potential energy.

What does the Law of Conservation of Energy state?

• Energy cannot be created or destroyed
• Nothing can exchange energy
• Energy will increase over time.
• Energy will decrease over time.

The picture showing the energy conversion

Electrical → light

is:

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• 
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What is the energy conversion when you plug in a stereo and listen to music?

• electrical to mechanical

• chemical to heat

• electrical to light

• mechanical to sound

What is the energy conversion when you plug in a fan?

• light to mechanical (motion)

• electrical to heat

• mechanical (motion) to light

• electrical to mechanical (motion)