Across
- 3. forms from remains of plants & animals.
- 4. could meet 5-10% of U.S. energy needs
- 5. uses underground steam & hot water
- 7. source of pollution from a known location
- 12. resource that can be replenished in months, years, or decades
- 14. careful use of resources
- 15. rock containing kerogen.
- 17. best known placer deposit
- 18. liquid that forms from remains of plants & animals.
- 19. collecting items for reuse
Down
- 1. uses ocean tides to create power
- 2. energy formed by fission
- 3. takes millions of years to form & accumulate
- 6. hydrocarbon used as an energy source
- 8. form thick tar called bitumen.
- 9. deposit formed when minerals settle quickly from moving water.
- 10. energy that uses water to drive turbines
- 11. forms when heat/pressure transform plant material
- 13. pollution with no specific point of origin
- 16. Earth's most abundant energy resource