1. Photosynthesis

2. Ted Talk: Photosynthesis
Ted Talk: Photosynthesis

3. Purpose of Photosynthesis:
Plants use the energy of sunlight to convert water and carbon dioxide into high energy carbohydrates (sugars and starches) and oxygen

4. Equation of Photosynthesis

5. Where Do the Reactants Come From?
1. Water: Soil
2. Carbon Dioxide (CO2):
3. Sunlight:

6. Where Do the Reactants Come From?
1. Water: Soil
2. Carbon Dioxide (CO2): atmosphere
3. Sunlight:

7. Where Do the Reactants Come From?
1. Water: Soil
2. Carbon Dioxide (CO2): atmosphere
3. Sunlight: sun (energy)

8. 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)

9. 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

10. Chlorophyll
Chlorophyll absorbs blue, purple, and red light

11. Chlorophyll Chlorophyll absorbs blue, purple, and red light
Chlorophyll reflects green light
This is why plants look green!

12. 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

13. 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

15. Where Does Photosynthesis Occur?
Chloroplasts of plant cells

16. Where Does Photosynthesis Occur?
Chloroplasts of plant cells
Structures:
Thylakoids: light collecting units in chloroplasts; light dependent

17. 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

18. Photosynthesis Song: