ch. 8 photosynthesis lm p. 41-42. energy & life autotrophs get energy they need to produce food...
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Ch. 8 Photosynthesis
LM p. 41-42
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ENERGY & LIFE
• Autotrophs get energy they need to produce food from the sun (or a light source)
• ATP stores energy for cell activities like active transport & movement within the cell
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PLANT EXPLORATION…
Van Helmont:
• Plants need water to grow
Priestley:
• Plants produce oxygen (O2)
Ingenhousz:
• Plants need light to produce oxygen (O2)
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Plants are green because of the pigment ______________.
(which absorbs light energy)
CHLOROPHYLL
•During the fall, the green chlorophyllgreen chlorophyll pigments are greatly reducedgreatly reduced revealing the other pigmentspigments.
•CarotenoidsCarotenoids are pigments that are either redred or yellowyellow.
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Chloroplast
Structures & Function:
Locate the …
1. Thylakoids
2. Granum
3. Stoma
2 stages of photosynthesis:
1. Light-dependent reactions
2. Calvin Cycle (Light-independent)
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Light Dependent Reactions
• Light absorbed by chlorophyll
(in Thylakoids)
• ADP converted to ATP
• Convert NADP+ to NADPH
(Electron Carriers)
• Produce Oxygen (O2) gas
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Calvin Cycle
• CO2 enters from atmosphere
• Energy from ATP & NADPH used to convert 3-carbon molecule to higher energy
• Produces a single 6-carbon sugar molecule
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Basic Process of Photosynthesis:
H2O CO2
Light Dependent Reactions
Calvin Cycle
O2 Sugars
CHRLORPLAST
Sun
LIGHT
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Factors that affect the rate of Photosynthesis are…
• Availability of Water
• Temperature
• Intensity of Light
• Concentration of CO2
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“World of Plants: Photosynthesis”Video Notes & Quiz
• Clear your desk except for the video notes page & pencil/pen
• Answer each question while watching the short video clip on photosynthesis
(There will be a video quiz at the end)
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CH. 9 CELL RESPIRATION