Across
- 4. The chemical backbone of all life on Earth.
- 7. When water that falls from the clouds as rain, snow, hail or sleet, collects in the oceans, rivers, lakes, streams.
- 8. A cycle that helps move oxygen through the three main regions of the Earth, the Atmosphere, the Biosphere, and the Lithosphere.
- 9. Occurs when there is more water than land can absorb.
- 10. Vital to all organisms and its availability influences rates of ecosystem processes.
- 12. Common term used for a harmful algal bloom.
- 13. A colorless, odorless gas produced by burning carbon and organic compounds and by respiration.
- 15. A process carried out by nitrifying bacteria, transforms soil ammonia into nitrates (NO3−), which plants can incorporate into their own tissues.
- 17. Change of the physical state of matter from the gas phase into the liquid phase.
- 22. Process by which chemicals present in organic matter are decomposed or oxidized into easily available forms to plants.
- 24. The microbial process of reducing nitrate and nitrite to gaseous forms of nitrogen.
- 25. Process by which plants and animals incorporate the NO3- and ammonia formed through nitrogen fixation and nitrification.
- 28. The change of a liquid to a gas.
- 29. Nitrogen gas is converted into inorganic nitrogen compounds.
- 30. Primary process that converts reduced organic nitrogen (R–NH2) to reduced inorganic nitrogen (NH4+) through the action of microorganisms.
- 31. A component of proteins and nucleic acids, is essential to life on Earth.
Down
- 1. A cycle that includes nitrogen, oxygen, carbon, and water.
- 2. A cycle that includes phosphorus, sulfur, and trace elements.
- 3. A component of nucleic acids, phospholipids, and ATP and other energy storing molecules.
- 5. The process used by plants and other organisms to convert light energy into chemical energy.
- 6. Precipitation that does not reach the soil.
- 11. Sum of evaporation from the land surface plus transpiration from plants.
- 14. The process by which groundwater exits the ground.
- 16. Occurs when any organic material is burned in the presence of oxygen.
- 18. A biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.
- 19. the conversion of water from liquid to gas as it passes through plants.
- 20. Product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds.
- 21. Process by which water on the ground surface enters the soil.
- 23. Process in which nitrate and ammonium are taken up by soil organisms and therefore become unavailable to crops.
- 26. The act or process of breathing by plants and animals.
- 27. Is essential for aerobic respiration in animals.