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