Energy

1
Energy

• Unit 2

2
Sound

• Energy that can be heard.
• Caused when things vibrate

3
Pitch

• How high or how low a sound is

4
Volume

• The loudness or softness of a sound

5
Light

• A form of energy that lets you see things-
• Example color

6
Reflect

• To bounce back, like light from a mirror

7
Absorb

• To take something in
• Example colors can be absorbed or reflected

8
Heat

• A form of energy that makes things warmer.
• Most heat on Earth comes from the sun.

9
Conductor

• An object that lets heat or electricity go
  through easily.

10
Insulator

• An object that does not let heat or electricity
  go through easily

11
Electricity

• A form of energy that can be used to make heat
  and light, and to power machines

12
Circuit

• A path for an electric current
• Often shown in a diagram with a battery, bulb,
  and wires

13
Open Circuit

• When the path of electricity is broken and the
  light does not come on

14
Closed Circuit

• When the path of electricity is complete and the
  light comes on

15
Switch

• A device for turning on or off electricity or an
  electric current