Across
- 4. energy generated by the pressure of moving water
- 7. energy n the form of heat
- 8. a natural fuel formed in the geological past from remains of living organisms
- 10. any natural resource in limited supply and cannot be replaced if used up
- 12. organic matter that contains stored energy from sunlight and that can be burned as fuel
Down
- 1. a cell that makes energy by changing solar radiation into electricity
- 2. ____ causes greenhouse gases and in turn causes global warming
- 3. the ability to do work; how things change and move
- 5. ____ released by aerosol cans have damaged the ozone layer and made the hole in the ozone layer
- 6. preservation, protection, or restoration of the natural environment, natural ecosystems, vegetation, and wildlife
- 9. the movement of electrons
- 11. a natural resource that can be replenished within a relatively short period of time