Water cycle Water moves between the ocean, atmosphere and land.

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Presentation transcript:

Water cycle Water moves between the ocean, atmosphere and land. When water changes from liquid form to an atmospheric gas = evaporation When water enters the atmosphere by evaporating from the leaves of plants = transpiration When water vapor condenses into tiny droplets = condensation Water returns to Earth’s surface in the form of precipitation

DRAW THIS and BE ABLE TO LABEL THIS DRAWING ON THE TEST!!! The Water Cycle Section 3-3 Condensation Precipitation Transpiration Evaporation Runoff Seepage Root Uptake Go to Section:

Nutrient cycles The food you eat contains energy and chemicals Nutrients = chemical substances that an organism requires to live Nutrients pass between organisms and the environment through biogeochemical cycles. Three important nutrient cycles: Carbon cycle Nitrogen cycle Phosphorus cycle

Carbon cycle Carbon is the key ingredient in all living organisms Carbon cycles between various components of the biosphere through different processes Biological processes (photosynthesis/respiration) Geochemical processes (volcanoes releasing CO2) Biogeochemical processes (organisms burial converts into coal/fossil fuels) Human activities (mining/burning fossil fuels/cutting trees)

CO2 in Atmosphere CO2 in Ocean The Carbon Cycle Go to Section:

Nitrogen cycle All organisms require nitrogen to make amino acids, which build proteins Nitrogen gas (N2) makes up 78% of Earth’s atmosphere Decomposers = bacteria living in soil and on the roots of plants (legumes) can convert nitrogen gas into ammonia = nitrogen fixation Some bacteria converts nitrates into nitrogen gas = denitrification

N2 in Atmosphere NH3 NO3- and NO2- The Nitrogen Cycle Go to Section:

Phosphorus cycle All living organisms require phosphorus because it forms parts of DNA and RNA Phosphorus exists in an inorganic form mostly on land in rock/soil and in ocean sediments As the rocks and sediments gradually wear down, phosphate is released When plants absorb phosphate, they bind the phosphate into organic compounds so it can move through the food web

Phosphorous Cycle