chapter 18

2. ___ energy is power created by using a dam to alter flow of water
4. ___ fuel is energy generated or produced by living or once-living organisms
9. ___ solar heating collects heat as the sun shines through south-facing windows and retains it in materials that store heat known as thermal mass
10. ___ thermal energy producing energy by different temperatures between ocean surface and deep ocean waters
11. ___ efficiency the use of less energy to perform the same task or produce the same result

1. ___ energy is energy derived from natural sources that are replenished at a higher rate than they are consumed
3. energy___ the use of less energy
5. ___ energy that does not come from fossil fuels so it produces less greenhouse gases
6. ___ solar heating uses solar energy to heat a fluid and transfer the solar heat to the interior space
7. ___ energy is heat that is generated within the earth
8. __ cell a device that produces electricity through a chemical reaction