Across
- 2. farming in water
- 5. lines curving across the map
- 7. community of organisms form bubble of life
- 9. natural or relating to nature
- 10. long-term weather conditions in an area
- 12. The fraction of light that the surface reflects
- 13. All ecosystems
Down
- 1. transfer of energy and matter between organisms
- 3. the variety of life on Earth
- 4. lines parallel to the Equator
- 6. a unit of pressure
- 8. the measure of dissolved salts in water
- 11. a large region with a certain climate or type of living things