Across
- 1. A role that an organism or population plays in its environment
- 4. Prevention Any practice that reduces/prevents a source of pollution
- 7. Deliberate preservation of a resource
- 9. Cell Converts the chemical energy of a fuel into electricity
- 11. Species An organism that is very likely to become extinct in the near future
- 12. Vehicle A vehicle that uses two or more types of power
- 13. A molecule that forms an important layer of protection in the Earth's atmosphere
- 14. A geographic area that circulates the same flow of air
- 16. Source Sources of pollution that are generated from a large area rather than a single point
- 17. A system consisting of living organisms within a community interacting with the nonliving parts of their environment
- 18. An area of land that catches and collects fresh water
Down
- 2. When a species' last organism dies
- 3. Any land that was once used but is now unoccupied and may potentially be contaminated
- 5. The sum of all ecosystems in the world
- 6. A group of organisms that live in a particular geographical area and are capable of interbreeding
- 8. Any type of close and long-term relationship between two different biological organisms
- 10. Species Any organisms that have the potential to die out in the near future
- 12. Anywhere that a group of species live
- 15. Groups of living things that share commonalities such as culture, values, nationality, species, identity, or religions