Earth Cycles

2. Nitrogen containing compounds that are the building blocks of plants and animals
3. The layer of the atmosphere that is closest to the earth
5. The reaction of hydrocarbons that releases CO2 into the atmosphere
7. Water that has condensed to form clouds and then falls back to earth
8. Organisms use high energy carbon based molecules for growth
9. These organisms break down animal and plant matter back into amino acids and then simple nitrogen compounds
11. A pigment found in all green plants that enables photosynth
13. Promoting health by preventing contact with waste
14. People who work to satisfy the needs of society

1. Made up of tectonic plates
2. An important part of the carbon cycle in which carbon dioxide is convereted into glucose
4. CO2 is released back into the atmosohere
6. The layer of the earth that is composed mostly of Iron
10. the coldest layer of the atmosphere
12. The layer of the earth that is under the crust