Mazen Lesson 3.2 and 3.3

Define energy.

• Energy is something that can be created.

• Energy is the capacity or ability to do work.

Which object requires only mechanical energy to perform its main function?

• 
• 

A student uses a set of headphones to listen to music. Which of these objects uses the same source of energy as the headphones?

• A teapot using thermal energy

• A keyboard using electrical energy

When a bat searches for prey at night, it makes sounds as it flies, and it uses the sounds' echoes to find its prey. When the bat flies and listens to echoes to locate prey, it is using...

• Mechanical energy and sound energy

• Light energy and mechanical energy

Sound energy is present when...

• energy is created

• an object vibrates

____________ energy is from the sun or also called solar energy.

• radiant

• chemical

__________ energy is released from a substance when transformed into a new substance.

• heat

• chemical

Which type of energy does the battery produce?

• sound

• electrical

A student connected some wire to a battery and a small bulb to make a simple circuit. Energy from the battery is changed into electricity. What type of energy is stored in the battery?

• chemical

• nuclear

What most likely caused the water on the table to evaporate?

• wind

• heat