Nutrient cycles, also known as______ cycles, describe the movement of chemical elements through different sources and processes, such as the atmosphere, soil, rocks, bodies of water, and organisms. Nutrient cycles keep essential _______ available to plants and other living organisms. The ______ of these elements is critical to maintaining life on Earth. The carbon cycle, the nitrogen and water cycle all have important _____ phases. The ______ cycle lacks a true ____ phase, and is slow and depends on the water cycle, also called the _______ cycle.
