Across
- 1. abundant element on Earth
- 6. location that may have natural gas
- 10. used by geologists to locate a place to drill
- 11. a type of rock where natural gas is found
- 15. hydrocarbons formed from these
- 17. country where most of natural gas is found
- 18. places that process fossil fuels
- 19. formed from the remains of swampy plants
Down
- 2. containers for oil
- 3. derived from petroleum
- 4. a type of rock where natural gas is found
- 5. type of rocks where fossil fuels are found
- 7. coal, oil, natural gas
- 8. energy in the core of an atom
- 9. colorless, odorless gas
- 12. where natural gas is found
- 13. formed from the remains of plants and animals
- 14. years it takes for fossil fuels to form
- 16. basic unit of matter