Biogeochemical Cycles

5. Process by which water vapor in the air is changed into liquid water
7. Process by which droplets of water fall to Earth as rain, snow, sleet, or hail
9. The fourth most abundant element in the universe and essential to life on Earth
11. The process of burning something
14. Cycle A system that transfers carbon from one part of the environment to another
17. Precipitation not absorbed into soil that moved to water collection points
18. Equation Glucose and oxygen yield carbon dioxide, water, and ATP energy
19. The downward movement of water from land surfaces into soil or porous rock
20. The most abundant element in the atmosphere, it is essential for life
21. Cycle A system that changes atmospheric nitrogen into usable forms

1. Carbon molecules bonded to hydrogen molecules
2. Carbohydrates(glucose) are used to make ATP energy for metabolic reactions
3. The breaking down of materials by rotting, decay, or microorganisms
4. Microscopic marine plants that use carbon to make shells of calcium carbonate
6. Cycle Process in which water circulates between Earth’s oceans, atmosphere, and land
8. A process by which green plants turn carbon dioxide into carbohydrates
10. Matter Matter originating from a living organism; contains hydrocarbons
12. Turning atmospheric nitrogen into useable forms
13. Equation Carbon dioxide, water, and sunlight yields glucose and oxygen
15. Nitrifying bacteria convert unusable forms of soil nitrogen into useable forms
16. Process by which water changes from a liquid into a gas