Across
- 2. a group of organisms of the same species that live in a specific geographical area
- 5. when something comes to an end or dies out
- 6. describes a species that has died out completely
- 7. the mostly solid, rocky part of the Earth
- 9. when we cut down to many trees
- 14. the average consumption per person within a population
- 15. all the living things on Earth
Down
- 1. an unwanted change in the environment caused by substances or forms of energy
- 3. all the water on Earth
- 4. the ruin or alternation of a place inhabited by an ecological community
- 8. a place where an organism usually lives
- 10. results when a species is used so much that the population becomes very small
- 11. any natural material or energy source that is used by humans, such as water petroleum, minerals, forests, and animals
- 12. the layer of gases that surrounds the Earth
- 13. a long term change in Earths climate