sience

2. the process by which materials in the Earth's crust are taken from the Earth
13. a resource that cannot be replaced or takes a very long time to be replaced. Examples: Nuclear energy, fossil fuels, and minerals
14. a resource that can be replaced in a short time. Examples: passive and active solar energy, biomass fuel, hydroelectric, geothermal, wind power.
17. a renewable resource that comes from the sun
19. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
20. nonrenewable resources in the Earth's crust, its made from the remains of ancient organisms.
21. the use of technology to collect, store, and distribute the sun's energy. Example: active solar heating of water.

1. conservation the practice of finding ways to use less energy or to use energy more efficiently
3. any substance in nature that we use for energy
4. electrical energy produced by the flow of falling water
5. power obtained by harnessing the energy of the wind through a windmill.
6. Electricity generated by the movement of sea water caused by the tides
7. Energy from steam or hot water produced from hot or molten underground rocks.
8. a cell that generates electricity from a controlled reaction between hydrogen and oxygen
9. the use of sunlight to heat buildings directly
10. A solid fossil fuel formed underground from buried, decomposed plant material.
11. a fossil fuel in a gas form used for heating and electricity production.
12. an oily fossil fuel, also know as crude oil
13. a Non-renewable resource that comes from within of atoms.
15. oil deposits that has been discovered but remains unused in the ground and can be extracted profitably at current prices using current technology
16. The process by which two or more small nuclei fuse to make a bigger nucleus.
18. Energy source that comes from plant material, manure, and any other organic matter.