Across
- 3. about 71% of the earth is covered by this
- 5. the natural home of a plant or animal
- 6. reduce, reuse, _______
- 7. a type of resource that can be replenished in a persons lifetime
- 9. trash that someone leaves on the ground instead of throwing away
- 10. the bottom of every food chain
- 12. what humans breathe out
- 14. when an animal or plant species is completely dead
- 15. a type of pollution caused by lights that brighten the sky
- 16. the name for an animal at the top of a food chain or web
Down
- 1. make 70% of earths oxygen
- 2. the home of an estimated 25% of marine life
- 4. when an aquatic species is overhunted to the point of protection, endangerment, or even extinction
- 8. happens on April 22 every year
- 11. the third planet from the sun
- 13. there is a hole in this that causes increased radiation