Across
- 4. the removal of withered rock
- 6. average weather conditions
- 9. a matierial in nature
- 10. divides earths geologicle history into intervals of time defined by major events
- 11. apparent effect of a rotating body that influences things on it
- 13. high region of air
- 15. a gas that contributes to global warming
- 17. a part of earth in which life can exist
- 18. the complete eradication of a specieces
- 19. a region in which all water collects and goes to the same place
- 20. a volume of air defined by it's tempature and water vapor content
Down
- 1. a large scale movement of water in the ocean
- 2. resources that can be replenished
- 3. a large scale, long term change in average weather in a region
- 5. resources that can not be replenished and have a limited amount
- 7. a force that exists between any 2 objects that have mass
- 8. the location where animals live
- 12. all living and nonliving things around a organism
- 14. things in the atmosphere at a given time and place
- 16. a natural event that threatens lives