Across
- 1. The study of life
- 2. We rely on these very old and dirty ______ ______ to power our cars and our homes
- 7. This contains everything an animal needs to survive.
- 9. An animal that is nearly extinct
- 14. The study of how plans and animals interact
- 15. Chemicals being put into either the air, earth, or water
Down
- 1. Anything form of life that can be broken down and re-used.
- 3. Someone why designs experiments to analyze and record the data
- 4. A type of air pollution caused by cars and factories
- 5. The growing of crops and raising of cattle
- 6. Too many people living in one area
- 8. resources Things that are taken from the Earth and used by humans
- 10. Cutting down all of the trees from a forest
- 11. A steady increase of temperatures on Earth
- 12. To keep everything exactly the way it is.
- 13. Energy the comes from the Sun