Across
- 3. Groups of different living things all in the same place.
- 4. When things that are not supposed to be in the environment show up.
- 5. ________ change; when weather changes over time.
- 8. _________ factors; living things that affect an environment.
Down
- 1. The area around all living and nonliving things.
- 2. ____________ relationships; how different things in an ecosystem work together.
- 6. __________ factors; nonliving things that affect an environment.
- 7. Habitat ________; when living things lose where they live.