PhotosynthesisPhotosynthesis
The Big PictureThe Big Picture
Carbon cycleCarbon cycle
Process by which carbon moves from organic t Process by which carbon moves from organic t inorganic compounds and backinorganic compounds and back
Producers convert inorganic carbon (CO2) into Producers convert inorganic carbon (CO2) into organic carbon compounds (glucose)organic carbon compounds (glucose)
Primary Consumers obtain organic compounds Primary Consumers obtain organic compounds by eating producersby eating producers
Secondary consumers obtain organic carbon Secondary consumers obtain organic carbon by eating primary consumersby eating primary consumers
Cellular Respiration by producers and Cellular Respiration by producers and consumers return CO2 to atmosphereconsumers return CO2 to atmosphere
In the natural carbon cycle, there are two In the natural carbon cycle, there are two main processes which occurmain processes which occur PhotosynthesisPhotosynthesis metabolismmetabolism
Carbon in Ocean and Carbon in Ocean and SedimentsSediments
CO2 is slightly solubleCO2 is slightly soluble Can be absorbed into waterCan be absorbed into water Some of the dissolved CO2 remains in the water, the warmer the water the Some of the dissolved CO2 remains in the water, the warmer the water the
less carbon dioxide remains in the waterless carbon dioxide remains in the water Some CO2 is used by algae and phytoplankton through the process of Some CO2 is used by algae and phytoplankton through the process of
photosynthesis photosynthesis Coral and shelled marine organisms take up CO2 from the water and Coral and shelled marine organisms take up CO2 from the water and
convert it into calcium carbonateconvert it into calcium carbonate When these organisms die pieces of shells/coral fall to ocean floor and make When these organisms die pieces of shells/coral fall to ocean floor and make
sediments sediments The carbonate sediments are constantly being formed and redissolved in The carbonate sediments are constantly being formed and redissolved in
the bottom of the ocean the bottom of the ocean Over long periods of time, the sediments may be raised up as dry land or Over long periods of time, the sediments may be raised up as dry land or
into mountains into mountains This type of sedimentary rock is called limestone This type of sedimentary rock is called limestone The carbonates can redissolve releasing carbon dioxide back to the air or The carbonates can redissolve releasing carbon dioxide back to the air or
waterwater
Humans and the Carbon Humans and the Carbon CycleCycle
Combustion of any type of fossil fuel, which may Combustion of any type of fossil fuel, which may include oil, coal, or natural gasinclude oil, coal, or natural gas
Fossil FuelsFossil Fuels formed thousands of years ago from formed thousands of years ago from plant or animal remains that were buried, plant or animal remains that were buried, compressed, and transformed into oil, coal, or compressed, and transformed into oil, coal, or natural gasnatural gas
This carbon is said to be "fixed" in place and is This carbon is said to be "fixed" in place and is essentially locked out of the natural carbon cycleessentially locked out of the natural carbon cycle
Humans intervene during by burning the fossil fuels Humans intervene during by burning the fossil fuels During combustion in the presence of O2, CO2 and water During combustion in the presence of O2, CO2 and water
molecules are released into the atmospheremolecules are released into the atmosphere
Photosynthesis and Photosynthesis and Global Climate Global Climate
CO2 makes up 0.03 percent of Earth’s atmosphereCO2 makes up 0.03 percent of Earth’s atmosphere 300 parts per million300 parts per million
Greenhouse EffectGreenhouse Effect CO2 traps heat from sun in Earth’s atmosphere (otherwise it would escape into space)CO2 traps heat from sun in Earth’s atmosphere (otherwise it would escape into space) Not a bad thingNot a bad thing Keeps world climate warm enough to sustain lifeKeeps world climate warm enough to sustain life Keeps Earth 10% warmer than it would be without CO2Keeps Earth 10% warmer than it would be without CO2
Currently CO2 in atmosphere is risingCurrently CO2 in atmosphere is rising 360 parts per million360 parts per million
Burning fossil fuelsBurning fossil fuels DeforestationDeforestation Natural CausesNatural Causes
PhotosynthesisPhotosynthesis Cellular respirationCellular respiration DecompositionDecomposition Volcanic eruptionsVolcanic eruptions Ocean/limestoneOcean/limestone
Global WarmingGlobal Warming Overall rise in Earth’s average temperature over a period of timeOverall rise in Earth’s average temperature over a period of time
Class Work: Class Work: Due at 8:20 am TODAY!!!Due at 8:20 am TODAY!!!
NEATNEAT Skip lines between questionsSkip lines between questions p. 174 #1-6 Q&Ap. 174 #1-6 Q&A p. 174-175 #7-24 complete sentence p. 174-175 #7-24 complete sentence
answers answers STUDY for PHOTOSYNTHESIS TESTSTUDY for PHOTOSYNTHESIS TEST
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