Across
- 2. a massive oil spill in 2010
- 4. Formed from the remains of organisms millions of years ago
- 7. natural underground pressure pushes oil to the surface
- 10. Joining 2 atomic nuclei
- 13. natural gas is the ____ burning of the fossil fuels
- 14. Nuclear fission involves ____ __ an atoms nucleus
Down
- 1. Water/gas is injected underground to push oil upwards
- 3. ____ separates the different hydrocarbons called crude oil.
- 5. used when coal deposits are near the surface
- 6. Some atoms are ___
- 8. _____ are created during subsurface mining
- 9. With secondary extraction, the initial pressure ____
- 11. The major contributor of global warming is ___
- 12. Also known as hydraulic fracturing
- 13. formed from dead plant material called peat