Across
- 4. The layer of air and gasses surrounding Earth is the…
- 5. There is less than 3% of ____________ on Earth.
- 6. Rocks, water, and air are ___________ factors.
- 8. "bio" means ____________.
- 9. Biotic factors are _____________ things.
- 10. The biosphere is as thick as the skin on an ____________.
- 14. 21% of the atmosphere is made up of…
- 15. What is both a biotic factor and an abiotic factor?
- 16. The part of Earth where all living things exist is the…
- 18. There are four __________ on Earth.
Down
- 1. "Hydro" means __________.
- 2. People, plants, and animals are _________ factors.
- 3. .04% of the atmosphere is made up of…
- 7. All the water on Earth is part of the…
- 11. The land and rock in Earth's crust is part of the…
- 12. Abiotic factors are ______________ things.
- 13. 78% of the atmosphere is made up of…
- 17. There is more than 97% of ____________ on Earth.