project

4. a source of energy that can be replaced in a relatively short period of time
5. energy in a mechanical form
6. the energy of moving electric charges
7. stored energy
8. coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.
9. a source of energy that exits in limited quantities and, once used, cannot be replaced except over the course of millions of years
11. that part of the energy in a substance that can be released by a chemical reaction
12. the energy of motion
13. the total kinetic and potential energy of all the particles in a substance.
15. the energy of light and other forms of radiation

1. the practice of finding ways to use less energy or to use energy more efficiently
2. the energy released by a nuclear reaction
3. potential energy that depends on the height of an object
10. potential energy that is stored when a body is deformed
14. the capacity of a physical system to do work