Biogeochemical Cycles

1. Movement of water through soil
3. Compounds from long-ago plants and algae make these up
7. Bacteria converts nitrogen into ammonia, a form of nitrogen usable by plants
8. What flows directionally through Earth’s ecosystems, typically entering in the form of sunlight and exiting in the form of heat
12. The biological conversion of organic and inorganic nitrogenous compounds from a reduced state to a more oxidized state
13. What percentage of water is found in human cells
16. Resources being used up much faster than they can be produced by geological processes
19. The process that changes liquid water to gaseous water
20. Process of incorporating carbon from atmospheric carbon dioxide into cells
21. Organisms that produce their own food
22. Percent of nitrogen that makes up the earths atmosphere
23. When fossil fuels are burned, this is created and release in response
24. What percentage of your body consists of carbon atoms, by mass
25. Process by which some organisms use sunlight to synthesize foods
26. The conversion of soil nitrates to nitrogen gases by a diverse array of bacteria

2. Converting the organic carbon back into carbon dioxide gas
4. The set of places where water can be found as it cycles on earth
5. Sun moves water into the atmosphere in the form of water vapor
6. Another name for the hydraulic cycle
9. Water found in the pores between particles in sand and gravel or in the cracks of rocks
10. Water on the ground gets soaked into the soil
11. Burning of coal, oil, and natural gas
14. Organisms that eat other organisms for food/energy.
15. Water enters through the roots, travels upwards through the vascular tubes made out of dead cells, and evaporates through the stomata
17. Water vapor in the atmosphere condenses into cloud and falls to the earth
18. The way an element or compound moves between its various living and nonliving forms and locations in the biosphere