Introduction to Energy

4. Prefix that means "water".
5. Unit of measurement for energy.
6. The ability to do work.
10. Fossil fuel that is used to make gasoline, jet fuel, plastics and medicines.
11. Type of mechanical energy associated with moving objects.
13. Energy source that is replaced rapidly by natural processes.
14. "Energy cannot be created or destroyed" is part of the law of _____ of energy.
16. Radioactive element used as a source of energy in nuclear power plants.
17. Thunder is an example of this form of energy.
18. Prefix that means "earth".
21. Lightning is an example of this form of energy.
22. Another name for electromagnetic, or light, energy.

1. When energy is converted from one form to another, some of the original energy is often "wasted" and turned into this type of energy.
2. Black or dark brown rock that was formed from ancient plants and is typically burned to generate electricity.
3. The U.S. and China consume (use) more energy than they _____ (make).
7. Device that transforms (kinetic) mechanical energy into electricity.
8. Form of energy that comes from the processes of fission or fusion.
9. Energy source caused by uneven heating of the earth’s surface by the sun.
12. Converting (changing) one form of energy into another form of energy is also known as an energy _____.
15. Refers to how much useful energy you can get out of a system.
19. Form of energy stored in the bonds of atoms and molecules.
20. Fossil fuel that is a flammable gas and is often bottled as fuel.