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Photosynthesis
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Ted Talk: Photosynthesis
Ted Talk: Photosynthesis
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Purpose of Photosynthesis:
Plants use the energy of sunlight to convert water and carbon dioxide into high energy carbohydrates (sugars and starches) and oxygen
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Equation of Photosynthesis
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Where Do the Reactants Come From?
1. Water: Soil 2. Carbon Dioxide (CO2): 3. Sunlight:
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Where Do the Reactants Come From?
1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight:
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Where Do the Reactants Come From?
1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight: sun (energy)
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Where Do the Reactants Come From?
1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight: sun (energy) How? Sunlight travels to the Earth as white light (a mixture of all of the different wavelengths and colors of light)
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Where Do the Reactants Come From?
1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight: sun (energy) How? Sunlight travels to the Earth as white light (a mixture of all of the different wavelengths and colors of light) Plants capture light energy with a pigment molecule called chlorophyll Chlorophyll A Chlorophyll B
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Chlorophyll Chlorophyll absorbs blue, purple, and red light
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Chlorophyll Chlorophyll absorbs blue, purple, and red light
Chlorophyll reflects green light This is why plants look green!
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Chlorophyll Chlorophyll absorbs blue, purple, and red light
Chlorophyll reflects green light This is why plants look green! Chlorophyll: a pigment in plants that captures light energy
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Chlorophyll Chlorophyll absorbs blue, purple, and red light
Chlorophyll reflects green light This is why plants look green! Chlorophyll: a pigment in plants that captures light energy Energy from the light makes photosynthesis work
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Where Does Photosynthesis Occur?
Chloroplasts of plant cells
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Where Does Photosynthesis Occur?
Chloroplasts of plant cells Structures: Thylakoids: light collecting units in chloroplasts; light dependent
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Where Does Photosynthesis Occur?
Chloroplasts of plant cells (2 membranes) Structures: Thylakoids: light collecting units in chloroplasts; light dependent (look like a stack of coins) Stroma: space outside of the thylakoid membrane; light independent
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Photosynthesis Song:
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