Across
- 3. It is a thin spherical envelope of gases surrounding the earth's surface.
- 4. chain, transfer of food energy from green plants(producers) through a series of organisms with repeated stages of eating and being eaten.
- 7. It is the state of equilibrium.
- 8. consists of the parts of the earth's air, water, and soil where life is found.
- 10. scientific study of the relationship between organisms and their environment.
Down
- 1. obtain energy by oxidizing compounds and use energy to synthesize carbohydrates .
- 2. A group of potentially interbreeding individuals occuring together in space and time.
- 5. organisms feeding upon both plants and animals
- 6. the place where a population or an individual organism normally lives.
- 9. collection of related parts that function as a unit.