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Download The Water Cycle - Fall River Public Schools
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Cycles of Matter Water & Carbon Cycles Honors Biology Mr. Lee Room 320 Objectives Describe how matter cycles among the living and nonliving parts of an ecosystem Describe the water cycle Describe the carbon cycle Introduction Organisms need water, minerals, and other compounds too 95% of most organisms are made up of just 4 elements: Oxygen Carbon Hydrogen Nitrogen Recycling in the Biosphere Matter is recycled within and between the ecosystems Biochemical cycles: how matter is passed from one organism to another and from one part of the biosphere to another Biological systems do not use up matter, they transform it: Assembled into living tissue Passed out of the body as waste products The Water Cycle All living things require water Water moves between the ocean, atmosphere, and land Evaporation is the process where water changes from liquid form to an atmospheric gas Water can also enter the atmosphere by evaporating from leaves of a plant in the process of transpiration http://www.youtube.com/watch?v=YswL4dIDQuk The Water Cycle… As warm moist air rises, it cools and forms clouds When the droplets become large enough, the water returns to Earth’s surface in the form of precipitation The rain eventually enters a river or stream, and then runs off to the ocean Some of the rain seeps into the soil, some goes to ground water, while some is absorbed by plants Nutrient Cycles All the chemical substances that an organism needs to sustain life are its nutrients Primary producers usually obtain nutrients in simple inorganic forms from their environment Consumers obtain nutrients from eating other organisms Three important cycles are: Carbon cycle Nitrogen cycle Phosphorus cycle Carbon Cycle Carbon is a key ingredient of living tissues Four main types of processes move carbon through its cycle: Biological process: photosynthesis, respiration, and decomposition take up & release CO2 and O2 Geochemical processes, such as erosion and volcanic activity release CO2 into the atmosphere and oceans Cole and the Carbon Cycle Carbon Cycle… Mixed biogeochemical: Burial and decomposition of dead organisms Processes, how coal and oil was made Human activities, mining, burning fossil fuels release CO2 Review Describe how matter cycles among the living and nonliving parts of an ecosystem: Biochemical cycles: how matter is passed from one organism to another and from one part of the biosphere to another Biological systems do not use up matter, they transform it: Assembled into living tissue Passed out of the body as waste products Review… Describe the water cycle: Water moves between the ocean, atmosphere, and land Evaporation is the process where water changes from liquid form to an atmospheric gas Evaporation on plant leaves is called transpiration As warm moist air rises, it cools and forms clouds, then returns to the Earth as precipitation The rain seeps into the soil or enters a river or stream, and then runs off to the ocean Review… Describe the carbon cycle: Biological process: photosynthesis, respiration, and decomposition Geochemical processes, such as erosion, and volcanic activity Mixed biogeochemical processes, how coal and oil was made Human activities, mining, burning fossil fuels release CO2
