Across
- 2. fuels made of ancient remains of animals
- 5. Bactrea fixes nitrogen in this cycle
- 8. A mixture of gases that surrounds a planet or moon.
Down
- 1. The layer where we live
- 3. Evaporation plays a major role in this cycle
- 4. Examples: Rain, Snow, Sleet, Hail
- 6. Animal waste plays a big role in this cycle
- 7. Example: Water into Water Vapor