Energy Review

When the rock falls, what happens to its potential energy? ​ (a)  

• decreases
• increases
• stays the same

When the rock falls, what happens to its kinetic energy? ​ (a)  

• increases
• decreases
• stays the same

When the rock falls, what happens to the sum (total) energy? ​ (a)  

• stays the same
• decreases

Match the following object to it's closest type of energy

• Gravitational

• Rubber band

• Chemical

• A ball dropping

• Elastic

• A battery

• Acoustic

• Musical instrument being played

Energy of motion is which type of energy?

• Potential
• Kinetic
• Sound
• Gravitational

A lamp begins with electrical energy when plugged in and turns into _________ energy when the light comes on.

• mechanical

• kinetic

• radiant

• sound

What type of energy transformation occurs when a hawk eats a mouse and then uses that energy to fly?

• chemical to mechanical

• mechanical to chemical

• thermal to mechanical

• mechanical to thermal

What energy transformation occurs when a crock pot is plugged into an outlet and then the control knob is turned "on"?

• thermal to electrical

• mechanical to thermal

• electrical to thermal

• electrical to sound

What is an advantage of producing electricity through hydropower?

• land is flooded when dams are built

• Hydropower is a clean, renewable source of energy for human use

• building dams destroys animal habitats

• building dams for hydropower uses up lots of land space

Which is a disadvantage of solar power?

• solar power is unclean

• reduces the need for fossil fuels

• can only be collected when the sun is shining

• in nonrenewable