Across
- 2. any mineral that formed during the original solidification (crystallization) of the rock
- 5. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
- 10. excess fertilizer can runoff into streams and lakes causing toxic algal blooms that are harmful to aquatic life and even people and their pets
- 14. a chemical compound of sulfur and the anhydride of sulfuric acid. Sulfite, a chemical ion composed of sulfur and oxygen with a 2− charge.
- 15. Cycle the series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels
- 17. the movement of digested food molecules into the cells of the body where they are used
- 20. the primary process that converts reduced organic nitrogen (R–NH2) to reduced inorganic nitrogen (NH4+) through the action of microorganisms
- 21. the laying down of sediment carried by wind, flowing water, the sea, or ice.
- 22. Cycle the movement of sulfur through the geosphere and biosphere. Sulfur is released from rocks through weathering, and then assimilated by microbes and plants.
- 23. a sulfur oxoanion obtained by deprotonation of both OH groups of sulfuric acid
- 24. the process of rotting; decay
- 25. Cycle a biogeochemical process through which nitrogen is converted into many forms, consecutively passing from the atmosphere to the soil to organism and back into the atmosphere. It involves several processes such as nitrogen fixation, nitrification, denitrification, decay and putrefaction.
- 26. NO3 a nitrogen oxoanion formed by loss of a proton from nitric acid.
- 28. the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.
- 29. bacteria prokaryotic microorganisms that are capable of transforming nitrogen gas from the atmosphere into “fixed nitrogen” compounds, such as ammonia, that are usable by plants.
- 31. NH3 a chemical compound composed of one nitrogen atom and three hydrogen atoms
- 32. The phosphate sediments form from precipitation of phosphate from seawater, along with the skeletons and waste products of creatures living in the seas
Down
- 1. a microbial process that converts ammonia and similar nitrogen compounds into nitrite
- 3. break down the complex nitrogen compounds in dead organisms and animal wastes
- 4. CO2 Carbon dioxide dissolves in water and slowly reacts with water to produce carbonic acid
- 6. Respiration The process by which organisms break down glucose into a form that the cell can use as energy
- 7. the process of rotting; decay
- 8. the process by which phosphorus moves through the lithosphere, hydrosphere, and biosphere
- 9. CO2 Atmospheric CO2 warms the planet, which causes climate change
- 11. the process of eroding or being eroded by wind, water, or other natural agents
- 12. sulfide A dense, colorless gas. At low concentrations, it has a “rotten egg” odor. At high concentrations, it is extremely toxic and even explosive.
- 13. vertical elevation of the Earth's surface in response to natural causes
- 16. the process of burning something
- 17. N2 reactive forms of nitrogen and excludes stable nitrogen gas
- 18. the microbial process of reducing nitrate and nitrite to gaseous forms of nitrogen
- 19. the process of wearing or being worn by long exposure to the atmosphere
- 21. bacteria microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity.
- 27. (acid rain) any form of precipitation (rain, snow, hail or fog) whose acidity has been increased through the intake of acid pollutants from the air.
- 30. matter that settles to the bottom of a liquid