Across
- 3. preserving and protecting the environment
- 5. gases, carbon, etc.
- 6. all types of water
- 8. well-substantiated explanation acquired through the scientific method
- 9. observations about the world around us
- 10. all living organisms
- 11. proposed explanation
Down
- 1. change in weather
- 2. the ground, rocks, minerals, etc
- 4. manipulated or changed by the researcher
- 7. period of rapid industrial growth