Across
- 4. A biological community of interacting organisms and their physical environment.
- 5. Organisms that break down dead material and waste back into its components
- 7. Examples include rain, hail and snow
- 9. A non living factor in the environment
- 11. Examples include taiga, tundra and tropical rainforest
- 13. A consequence of eutrophication
Down
- 1. After a volcanic eruption - no soil is present - the ecosystem undergoes
- 2. The living factors in an environment
- 3. A process plants use to convert carbon dioxide and sunlight into oxygen and glucose
- 4. A change in an ecosystem caused by too much nitrogen in a body of water
- 6. When water is heated by the sun it
- 8. When water cools it undergoes ............. into clouds
- 10. Moss and lichen
- 12. The organisms at the bottom of a food pyramid