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Transcript
Energy Conversion Quiz Answer Key 1. True or false: Energy conversion means saving energy. false 2. State the law of conservation of energy. According to the law of conservation of energy, energy cannot be created or destroyed. 3. How does the law in question 2 apply to energy conversion? When energy changes from one form to another, the total amount of energy remains the same because energy cannot be created or destroyed. 4. When electricity is produced from coal, the chemical energy in coal is first changed to _____ energy. thermal 5. Most electricity comes from the burning of a) fossil fuels. b) trash. c) wood. d) none of the above a 6. True or false: Any form of energy can change into any other form of energy. true 7. True or false: One form of energy can change into two or more other forms of energy. true 1 8. Mechanical energy commonly changes back and forth between kinetic energy and _____ energy. potential 9. Examples of the energy conversion described in question 8 include a) using a playground slide. b) going up and down stairs. c) bouncing on a trampoline. d) all of the above d 10. Give an example of energy changing from one form to another. Answers may vary. Sample answer: Energy changes from chemical energy to mechanical energy when you digest food and use the energy it releases to move your body. 2
