Across
- 3. The change from one form of energy to another one.
- 5. Are naturally replaced more quickly than they are used.
- 6. We use this energy when we cook popcorn in the microwave.
- 7. This is generated from radioactive elements, like uranium.
- 8. This is caused by the sun heating the earth's surface.
- 9. A force that opposes motion between two surfaces that are touching.
- 11. This device was invented to measure energy from the sun.
- 12. This is used to generate electrical energy at nuclear power plants.
- 13. The energy of a compound that changes as its atoms are rearranged.
- 14. This converts the chemical energy in fossil fuels into electrical energy.
Down
- 1. The energy an object has because of it's position.
- 2. Is burned to make steam to run electric generators.
- 4. Cannot be replaced or is replaced slower than they are used.
- 10. This energy allows a hammer to do work on a nail.
- 15. a group of objects that transfer energy only to each other.