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