The Hydrosphere The Hydrosphere The hydrosphere is all of the Earthâs water â both fresh and salt. Water covers about 70% of the surface of the Earth. Of this water on…

Chapter 3 Biogeochemical Cycles Objectives: Identify and describe the flow of nutrients in each biogeochemical cycle. Explain the impact that humans have on the biogeochemical…

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APES Review 2013 Producers: Basic Source of All Food Most producers capture sunlight to produce carbohydrates by photosynthesis: Photosynthesis: A Closer Look Chlorophyll…