Changes In Population

4. tiny producers that live in water
5. A ______ is all the organisms of a given species that live together in the same area
6. a volcano in the state of Washington that erupted in 1980
10. to live well and have your population increase.
11. a species that is not native to an ecosystem is called this:
12. a soft young rock
14. an animal that hunts other animals
16. stone formations that look like bones of old dead animals
18. a slow-flowing river of ice
19. a large deer-like animal that lived on Isle Royale

1. _____ anchor themselves to solid surfaces, including other organisms.
2. when an entire species has died it has suffered an _____
3. this rock is made mostly of sand
7. The population of the moose had _____ by 1930.
8. a pressed layered rock
9. an animal that is hunted by other animals
13. the collection of all living and nonliving things and there interactions
15. food is a limited ______ in an ecosystem
17. a pack-hunting predator