Across
- 2. Organisms that feed on other organisms for energy are
- 5. Breaking down dead bodies is a job for
- 7. The uppermost layer of soil where most plants grow is
- 9. Nonliving factors in an ecosystem are called
- 10. The gradual washing or blowing away of soil is
- 11. Substances washing off the surface into water sources are called
- 13. What obtains energy by feeding on dead bodies
- 14. Good quality air that is free from ______ is important
- 17. Communities of interacting organisms are called
Down
- 1. Vehicles and industry produce gasses known as
- 3. Areas used to produce wood and fiber are called _____ forests
- 4. Preserving and protecting the natural environment is
- 6. Wildlife includes animals and ________ life
- 8. Organisms that convert light energy to food are
- 12. If one factor in an ecosystem is affected, then ___ are
- 15. Natural resources can be used by humans to fulfill a
- 16. Although water covers much of the earth it is not all