Ecosystems

2. community of organisms in a habitat that interact with one another and with their physical environment.
6. protect and preserve the natural environment by using the earth’s resources wisely
7. group of organisms of the same kind living together in a habitat
8. shows the feeding relationships between organisms.
11. Butterflies have a ________ relationship with flowers
14. Animals that eat only plants
15. process of releasing energy from food
16. known as producers
18. Some birds do this over large distances to avoid cold weather.
19. porcupine fish has sharp ________ to protect itself from enemies.
20. organisms in this ecosystem can tolerate a pH of about 7.

1. organisms that feed on and break down dead plants and animals into simpler
3. adaptations are features of an organism that help it to survive.
4. adaptations are the ways an organism behaves in order to survive.
5. different populations living together in the same habitat form
9. this species of plants grow in muddy area that lack oxygen supply.
10. eagles are ________ while rabbits and mice are their prey.
12. As energy passes along a food chain, the amount of energy transferred gradually ____________.
13. a place where the organism lives
14. Fleas are blood-sucking _______ usually found on mammals.
17. Plants need this to make food through photosynthesis.