Across
- 1. the process of carbon returning to the soil
- 4. the process commonly known as 'breathing'
- 6. radiation the atmosphere blocks
- 8. comes from the sun, atmosphere blocks it.
- 9. released by plants
- 10. the sphere that makes up the crust
Down
- 2. plants use it in photosynthesis
- 3. where meteorites burn up
- 5. blocks radiation
- 7. our planet