1
											2
			3
4								5
			6
								7
8
			9
												10

Across 4. Makes a light bulb feel warm when energy is converted in to ________ energy 6. When energy is not wasted we are practicing ______ of energy. 7. Energy _______ is a comparision of the amount of energy before a conversion with the amouth of useful energy after a conversion. 8. Not all of a cars _______ energy is converted in to kinetic energy. 9. A group of objects that transfer energy only to each other. 10. Electrical energy is converted in to ________ energy.

Down 1. States energy can not be created or destroyed. 2. _______ Energy is carried through the wire to be converted into thermal energy. 3. A force that opposes motion between two surfaces that are touching. 5. ______ motion machines would put out exactly as much energy as they take in.