how light is captured by plants to make food. photosynthesis photosynthesis is a process by which...
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PHOTOSYNTHESISHow light is captured by plants to make food
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PHOTOSYNTHESISPhotosynthesis is a process by which light
energy is converted into chemical energy of sugars and other organic compounds
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Light energy from light drives the reactions. Photosynthesis equation:
6 CO2 + 6 H2O → 6(CH2O) + 6 O2
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Electromagnetic EnergyThe solar energy called visible light drives
photosynthesis. Solar radiation is composed of
electromagnetic energyRemember, energy cannot be created
or destroyed. When light is absorbed by
a green plant, a small portion of that energy is converted into chemical energy in the process of photosynthesis.
Why are plants green?
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Chloroplast StructureChloroplasts are the sites of photosynthesis. These double-membrane bound organelles
enclose additional membranes called thylakoids.
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Plants are green because they have a substance called chlorophyll in them.
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Chlorophyll absorbs red and blue light but reflect green light!
The chlorophyll samples show peaks ofabsorbance at wavelengths in the blue and red areas of the visible spectrum.
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STAGES OF PHOTO-
SYNTHESIS
Redwood tree in California- 380 feet tall
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PHOTOSYNTHESIS
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Overview of PhotosynthesisSTAGE 1 - THE LIGHT DEPENDENT
REACTIONS.
Energy is captured from Sunlight. Water is Split into Hydrogen Ions, Electrons, and Oxygen (O2). The O2 Diffuses out of the Chloroplasts (Byproduct).
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Overview of PhotosynthesisSTAGE 2 -
The Light Energy is Converted to Chemical Energy, which is Temporarily Stored in ATP and NADPH.
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Overview of PhotosynthesisSTAGE 3 -THE CALVIN CYCLE
The Chemical Energy Stored in ATP and NADPH powers the formation of Organic Compounds (Sugars), using Carbon Dioxide, CO2.
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Overview of Photosynthesis