Across
- 5. The day-to-day condition of the atmosphere.
- 6. An animal with a backbone.
- 7. A community of living organisms and their non-living environment.
Down
- 1. The wearing away of Earth's surface by wind, water, or ice.
- 2. The control center of a cell.
- 3. The process plants use to make their own food.
- 4. A trait that helps an organism survive in its environment.
- 7. Science
- 8. system: The Sun and the planets that orbit it.