Energy

3. the process in which plants convert light into energy and release oxygen
5. a large wooden frame used to support drilling equipment for the extraction of oil
6. able to make more of something
11. a mixture of gases created by the breakdown of organic substances
12. power needed to run a machine
13. to pull out or remove
14. not allowing something to pass through
15. easily set on fire

1. an accumulation of material in one place
2. not able to make more of something
4. a substance that can be burned as a source of energy
7. careful or purposeful digging to uncover something
8. slippery liquid made from petroleum used for fuel
9. artificial, not made by nature
10. liquid found inside the earth that is removed and processed to create different products such as fuels and plastics