7 .Each element on Earth moves among reservoirs, which exist in the solid earth, in oceans, in the atmosphere, and within and among organisms as part of biogeochemical cycles. As a basis for understanding this concept:
-----A . Students know the carbon cycle of photosynthesis and respiration and the nitrogen cycle.
-----B .Students know the global carbon cycle: the different physical and chemical forms of carbon in the atmosphere, oceans, biomass, fossil fuels, and the movement of carbon among these reservoirs.
-----C .Students know the movement of matter among reservoirs is driven by Earth's internal and external sources of energy.
-----D .Students know the relative residence times and flow characteristics of carbon in and out of its different reservoirs.