Across
- 2. factor nonliving
- 7. year-to-year conditions of temperature and precipitation of an area
- 9. layer in a rain forest found underneath the canopy
- 11. a group of similar organisms
- 12. zone dark layers of the ocean, no sunlight
- 14. all the water above and below Earth's surface
- 15. zone sunlight region near the surface of the water
- 17. thin layer of gases that surround Earth
- 18. kind of a wetland formed where a river meets the ocean
- 19. part of Earth in which life exists including land, water, or air
Down
- 1. different populations that live together in the same area
- 3. factor living
- 4. dense covering formed by the top of leafy tops of tall rain forest trees
- 5. material formed from decaying leaves and other organic matter
- 6. a group of ecosystems that share similar climates and organisms
- 8. day-to-day conditions of the atmosphere including temperature, precipitation, and other factors
- 10. layer of permanently frozen subsoil found in the tundra
- 13. all of the rock at and below Earth's surface
- 15. group of individuals of the same species
- 16. all the organisms that live in a place, together with their nonliving environment