Water Conservation Activities and Resources for Students: This resource from the Arizona Department of Water Resources links to fact sheets, crossword puzzles, games, coloring books, activities, and booklets teachers and parents can use to spark an interest in water conservation.
o The Nitrogen Cycle: Defined. The nitrogen cycle is defined as the pathways for which nitrogen is recycled. As with all elements, nitrogen is constantly combined and uncombined with other elements to form essential and nonessential compounds for life.
The Carbon Cycle. Perhaps the most studied biogeochemical cycle is the carbon cycle, which, as you may have guessed, describes the pathways that carbon takes through living organisms and the environment. The carbon cycle is very different from either the nitrogen or phosphorus cycle. One reason is that the primary source of usable carbon for plants is carbon dioxide in the atmosphere, not the soil, which is where the main sources of phosphorus and nitrogen are for terrestrial plants. Because carbon dioxide is a gas that can move freely through the air and water, the carbon cycle is truly global.