Across
- 3. big ice cube
- 5. boil then evaporate
- 6. group of people in one area
- 9. build up of calcium
- 10. variety of different species
- 12. to observe someting
- 13. warm, wet, cold everywhere has one
- 14. you surf on this
- 15. laundry soap and something the moon affects
Down
- 1. something all organisms need
- 2. water does this to the ground
- 4. rocky mountain
- 7. something that we are running low on (97% of the earth is covered)
- 8. area of land that drains into one main lake
- 11. salt content in the ocean