vocab day 12

3. a gradual increase in the earth's temperature generally due to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants
4. an organism that cannot produce its own food and must eat other plants and/or animals to get energy
5. the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial, and marine ecosystems
7. water which collects as droplets on a cold surface when humid air is in contact with it.
10. any liquid or frozen water that forms in the atmosphere and falls to Earth
11. describes how carbon moves between the atmosphere, soils, living creatures, the ocean, and human sources
12. a chemical or natural substance added to soil or land to increase its fertility.

1. the process of burning something.
2. the process of converting natural nitrogen compounds into ammonia
6. a biological community of interacting organisms and their physical environment.
8. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow
9. have the ability to break down dead organisms into smaller particles and create new compounds
12. nonrenewable sources of energy formed from the organic matter of plants and microorganisms that lived millions of years ago