Across
- 4. large territory with countless species that live in the same climate
- 5. all the non-living things
- 8. process of how the water is absorbed and gets again to the Earth and so on.
- 10. a group of counted organisms of the same species
- 13. layer under the ocean water
- 14. water above the land.
Down
- 1. The scientific study about how organisms interact with the environment.
- 2. a large group of species and different organisms
- 3. one type of species
- 4. animals and plant lives
- 6. a large group of different species
- 7. where organisms live in an ecosystem
- 9. the "green" layer at the same level as water and under the air layer.
- 11. gas layer on a planet
- 12. it's combined with all portion where life exists (land, water, and air).