Across
- 3. the scientific study of the interactions between living organisms and their environment
- 5. a gaseous envelope surrounding the plane
- 7. having no living members; no longer in existence
- 8. a system comprised of all the living organisms (biotic factors) in a particular area, along with the non-living components (abiotic factors) of their environment, and their interactions
- 10. relating to or derived from living matter
Down
- 1. convert (waste) into reusable material
- 2. relating to or determined by the sun
- 4. contaminate (water, air, or a place) with harmful or poisonous substances
- 6. the surroundings or conditions in which a person, animal, or plant lives or operates
- 9. a highly reactive gas composed of three oxygen atoms