2.2 – Phosphorus Cycle.

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Presentation transcript:

2.2 – Phosphorus Cycle

Review Time! What is the largest nitrogen store? Sedimentary rocks The ocean The atmosphere The soil Organisms

Review Time! Nitrogen is stored in the atmosphere as N N2 NO3- NO2- NH4+

Review Time! Which of the following processes represent nitrogen fixation? N2  NH4+ NH4+  NO3- NH4+  NO2- NO2-  NO3- NH4+  N2

Review Time! How does nitrogen fixation happen? Nitrogen oxides + H2O  acid rain Nitrifying bacteria Nitrogen fixing bacteria Lightning Both B and D Both C and D

Review Time! Which of the following processes represents denitrification? N2  NH4+ N2  NO3- NH4+  N2 NO2-  N2 NO3-  N2

Review Time! What is shown in the picture? Green! algae boom algal boom algae bloom algal bloom

Review Time! How does an algal bloom occur? Too much N in the water from fertilizers Too much N in the water from sewage Too much N in the water from human waste Too much N in the water from animal farming All of the above

ATP adenosine triphosphate nucleotide carries energy within organisms PO43- HPO42- H2PO4-

Phosphorus cycles as PO4- by weathering uptake by plants and animals decomposition run-off leaching sedimentation sedimentary rock formation geological uplift

Terrestrial organisms Marine life Practice: Refer to P.9 of the Data Booklet. List the top five phosphorus sinks, from largest to smallest. __________________________________ What is the largest store of phosphorous? ___________________________________ Is there more phosphorous in marine organisms or terrestrial organisms? _______________________ How much phosphorous is in the atmosphere? _______________________ Which human activity has the largest effect on phosphorous? _________________________ Where do animals get their phosphorous? _____________________________ How much phosphorous dissolves from rocks and goes into the water? ___________________ Earth’s crust Ocean sediments Mineable phosphate Terrestrial organisms Marine life Earth’s crust Terrestrial organisms None Use of fertilizers Uptake of plants 1000 x 1012 g/year

too many plants in the way for farming there are too many pests the soil lacks nutrients