Across
- 3. an area of land that all drains to the same spot
- 6. the range which mount hood is part of
- 7. liquid rock beneath the earth's surface
- 9. the abbreviation for dissolved oxygen
- 10. the San Andreas fault in California is this type of plate boundary
- 13. the center of an earthquake on the surface of the earth
- 17. the area of land near a river
- 18. a chemical reaction where fuel and oxygen turn into energy, carbon dioxide, and water vapor
- 19. when one stream feeds into a larger one
- 20. the most common type of plastic made today
- 22. when an oceanic plate dives under a continental plate
- 23. when a material is worn away by things such as wind or water
- 24. Mr. Campbell grew up in this town Washington
- 25. liquid rock above the earth's surface
Down
- 1. a living part of the ecosystem
- 2. when a material is decomposed by organisms
- 4. when sediment is placed down
- 5. organisms without a spine that can be used to indicate the health of a stream
- 8. a name for a group carbon atoms, often the result of burning
- 11. a measure of how much sediment is in the water
- 12. a place where life does not exist because all the oxygen has been used up by decomposing algae
- 14. when water travels on the surface of the land, sometimes carrying pollution with it
- 15. a non-living part of the ecosystem (wind, sunshine, temperature)
- 16. 78% of the atmosphere
- 21. Mr. Smith grew up in this town in California