1. Photosynthesis (an overview) 8-2

2. Investigating Photosynthesis
photosynthesis: the process that uses energy from sunlight to transform carbon dioxide (CO2) and water (H2O) into oxygen (O2) and carbohydrates (C6H12O6)

3. The Photosynthesis Equation
light
6CO H2O  C6H12O O2
carbon dioxide + water  glucose + oxygen

5. Light and Pigments
Plants have pigments: light absorbing molecules that capture the sun’s energy
If the light is not absorbed, it is reflected…this is the color that we see.

7. Lights and Pigments Pigments Include:
chlorophyll a
chlorophyll b
absorbs well in red and blue but poorly in green
plants also have red , yellow and orange pigments that absorb other colors
energy is transferred to electrons in pigments when they absorb sunlight

9. Inside a chloroplast
Copy the following:
Copy the following
Photosynthesis takes place in the chloroplasts of photoautotrophs
Chloroplasts have two components:
thylakoids: saclike membranes found in chloroplasts
arranged in stacks known as grana
contain pigments that capture sunlight
stroma: gel-like matrix surrounding the thylakoids

10. Photosynthesis takes place in the chloroplast of photoautotrophs

12. The chloroplast

13. Reactions of photosynthesis
Name the two reactions of photosynthesis.
For each reaction:
Name where it takes place
List what is needed for the reaction.
List what is produced
Explain the importance of the reaction
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