5.6A Uses of energy

What forms of energy are important to have present when watching television?

• sound, thermal, and light
• electrical and sound
• electrical, light, and sound
• thermal and light

Humans often use fans to stay cool.The rotation of the fan blades is an example of what type of energy?

• electrical
• sound
• thermal
• mechanical

What type of energy source does a solar panel use?

• sound
• mechanical
• thermal
• light

Which of the following is an example of the use of sound energy?

• a bat using echolocation to find its prey
• blades on a wind turbine spinning
• a campfire heating hot dogs
• a power plant using coal for power

A lamp uses electrical energy to produce what two other kinds of energy?

• mechanical and sound
• heat and mechanical
• light and sound
• heat and light

Which form of energy allows us to see our reflection in a mirror?

• Electrical
• light
• thermal
• mechanical

Hot-air balloons rise when a burner, positioned under the opening of the balloon, uses propane to create a blast of fire. What form of energy causes a hot-air balloon to rise into the air? 

• mechanical
• light
• thermal
• electrical

All of the following are examples demonstrating mechanical energy EXCEPT –

• an oven cooking food.
• a fan blowing out air. 
• a boy riding a bicycle.
• a girl writing with a pen.

Headphones get electrical energy from the device to which they are attached. The headphones change this energy into what other kind of energy?

• sound
• light
• thermal
• mechanical

Which kind of energy is the computer you're using right now both USING and PRODUCING?

• mechanical, light, and thermal
• electrical, light, sound, and thermal
• electrical, sound, and mechanical
• thermal, sound, and light