1. Energy Unit 2

2. Sound Energy that can be heard.Energy that can be heard. Caused when things vibrateCaused when things vibrate

3. Pitch How high or how low a sound isHow high or how low a sound is

4. Volume The loudness or softness of a soundThe loudness or softness of a sound

5. Light A form of energy that lets you see things-A form of energy that lets you see things- Example: colorExample: color

6. Reflect To bounce back, like light from a mirrorTo bounce back, like light from a mirror

7. Absorb To take something inTo take something in Example: colors can be absorbed or reflectedExample: colors can be absorbed or reflected

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

9. Conductor An object that lets heat or electricity go through easily.An object that lets heat or electricity go through easily.

10. Insulator An object that does not let heat or electricity go through easilyAn 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 machinesA form of energy that can be used to make heat and light, and to power machines

12. Circuit A path for an electric currentA path for an electric current Often shown in a diagram with a battery, bulb, and wiresOften 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 onWhen 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 onWhen the path of electricity is complete and the light comes on

15. Switch A device for turning on or off electricity or an electric currentA device for turning on or off electricity or an electric current