Across
- 2. A unit of plants, animals, and non-living-components of an environment that interact.
- 4. Accumulation in a biological system over time.
- 5. Rain, snow or fog that is unnaturally acidic due to gases in the atmosphere that react with water to form acids.
- 14. An ecosystem that is land based.
- 17. Devoid of or inimical to life.
- 18. Atmosphere gases that prevent heat from leaving the atmosphere, thus increasing the temperature of the atmosphere.
- 19. A category of organisms that is defined by how the organisms gain their energy.
- 21. When the environment becomes enriched with nutrients, which can cause algal blooms.
- 22. The process by which plants use sunlight to synthesize foods from carbon dioxide and water.
Down
- 1. An ecosystem that is capable of withstanding pressure and giving support to a variety of organisms.
- 3. The gas surrounding the earth.
- 6. The total mass of living material in an ecosystem.
- 7. A substance that plants, animals, and people need to live and grow.
- 8. An ecosystem that is water based, either fresh water or salt water.
- 9. Relating to living organisms.
- 10. A process that releases energy from organic molecules especially corbohydrates, in the prescence of oxygen.
- 11. The solid outer portion of the earth consisting of the crust and upper mantle, approximately 100 km (62 miles) thick.
- 12. The warming of earth as a result of greenhouse gases, which trap some of the energy that would otherwise leave earth.
- 13. A process that releases energy from organic molecules especially corbohydrates, in the abscence of oxygen.
- 15. The water of the earth.
- 16. A measure of the amount of energy or biomass transferred from one trophic to the higher trophic level.
- 20. The part of the Earth in which life can exist.