Across
- 2. Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.
- 4. compound Compounds that contain carbon
- 6. A unicellular organism that lacks a nucleus and membrane bound organelles
- 7. A resource that has a theoretically unlimited supply and is not depleted when used by humans.
- 9. The total energy of motion in the particles of a substance
Down
- 1. Energy stored in the nucleus of an atom
- 3. A source of energy that is a finite supply capable of being exhausted.
- 5. needed by the body for growth and repair
- 8. a device that stores electrical energy produced by a solar cell during the day
- 10. A cell that contains a nucleus and membrane bound organelles