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Read Handout: Section 2.6 (Science Perspectives 9 by Nelson) – pages 48 - 51 Approximately how many of your red blood cells are being replaced every second? red blood cells / second Approximately how many red blood cells would that be in 1 hour? red blood cells / hour - biogeochemical cycles continuously and use materials , rearrange, what are the root words for biogeochemical? bio = & geo = & chemistry = Water Cycle In which part of the environment is most of the water in the water cycle found? Environment. Complete the following Figure for the molecule water, labeling numbers 1 – 9. 1: 2: 3: 4: 5: 6: 7: 8: 9: Carbon Cycle most of the exchange of carbon occurs between and o most of Earth’s carbon is not cycled but sits in ‘sinks’ or plants human activities disrupt the carbon cycle by taking carbon naturally found in a sink and introducing it into the cycle 2 examples of humans disrupting the carbon cycle 1: 2: this increases the carbon present in the atmosphere and has been linked to rising temperatures Nitrogen Cycle o bacteria remove nitrogen from the atmosphere through nitrogen fixation and nitrification this converts gaseous nitrogen into , and compounds that are available to plants) o bacteria also remove these compounds from the soil through denitrification and return it to the gaseous form o consumers obtain nitrogen by eating producers Answer the following questions in your notebook using full sentence answers: Pg. 47 # 1 - 8