vocab

6. The process by which bacteria in soil and water oxidize ammonia and ammonium ions and form nitrites and nitrates
9. of a plant or leaf) the exhalation of water vapor through the stomata.
10. the chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant.
11. water held underground in the soil or in pores and crevices in rock.
12. the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.
14. rain, snow, sleet, or hail that falls to the ground.
16. a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
17. the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere

1. water that collects on the surface of the ground.
2. conversion of a substance from the solid to the gaseous state without its becoming liquid
3. a colorless, odorless, highly flammable gas, the chemical element of atomic number 1.
4. the chemical element of atomic number 15, a poisonous, combustible nonmetal which exists in two common allotropic forms, white phosphorus, a yellowish waxy solid which ignites spontaneously in air and glows in the dark, and red phosphorus, a less reactive form used in making matches.
5. the loss or removal of nitrogen or nitrogen compounds
7. the process through which the physical state of matter changes from the gaseous phase into the liquid phase
8. the continuous movement of water within the Earth and atmosphere.
13. the chemical element of atomic number 6, a nonmetal which has two main forms (diamond and graphite) and which also occurs in impure form in charcoal, soot, and coal.
15. the process that changes liquid water to gaseous water (water vapor)