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Published byGodfrey Stewart Modified over 9 years ago
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Photosynthesis Process of plants using light energy to produce glucose To put together using light
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Chemical Equation CO 2 + H 2 O C 6 H 12 O 6 + O 2 Requires light Requires chloroplasts
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Reactants CO 2 + H 2 O
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Carbon Dioxide (CO 2 ) About.03% of the atmosphere Sources –Respiration –Burning –Decomposition Enters plant leaf through stomate
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Water (H 2 O) Enters the plant root system (root hairs) by osmosis Travels through from the roots to the leaves Travels through xylem from the roots to the leaves Transpiration- evaporation of water from leaves
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Energy Light- small portion of the EM spectrum ROY G. BIV Blue, Violet, Red used most by leaf
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Chloroplasts Photosynthetic organelles found in certain leaf cells, contains the pigments
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Primary Pigments Visible during the growing seasons –chlorophyll a- green –chlorophyll b- green
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Secondary Pigments Not visible during the growing season Hidden by the primary pigments Become visible in the fall of the year
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Secondary Pigments Carotenoids –Carotene- orange –Xanthophyll-yellow –Anthocyamin- red
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Chloroplast Structure Grana- stack of tiny discs, contain the chlorophyll –light reactions take place here, light is required
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Chloroplast Structure Stroma- contains enzymes –dark reactions take place here, light not required
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Products C 6 H 12 O 6 + O 2
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Glucose (C 6 H 12 O 6 ) Formed in the chloroplasts Transported through vessels called phloem Stored as carbohydrates in roots, stems, leaves, fruit, seeds, etc
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Oxygen (O 2 ) Released through the stomata into the atmosphere
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Absorption of Chlorophyll P 115, Figure 6-5 1. Look at chlorophyll a, what color of light is absorbed the most? What is its wavelength? 2. Look at chlorophyll b, what color of light is absorbed the most? What is its wavelength?
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Absorption of Chlorophyll 3. Look at the carotenoids, what color of light is absorbed the most? What is its wavelength? 4. Why are there no peaks between 540 nm and 640 nm?
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Absorption of Chlorophyll 5. What colors are reflected most by the pigments? 6. Arrange the colors in the spectra for chlorophyll a & b in the order of their visiblity. List the most visible 1 st
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Absorption of Chlorophyll 1. chlor. a abs- violet, 425 nm 2. chlor. b abs- blue, 460 nm 3. carot. Abs- blue-green, 475 nm 4. The colors are being reflected. 5. refl. most- green, yellow, orange 6. order of visibility- green, yellow, orange, red, violet, blue
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All images- Clip Art
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