1. Lecture 9 - Photosynthesis
Entropic Doom
Light Heat

2. Entropic Doom encounters a detour on Earth Photosynthesis (life)
Light Heat
Photosynthesis (life)

3. chlorophyll converts light energy into chemical energy.
Review
Chlorophyll

4. Light absorbing reactions of photosynthesis occurs in chloroplast
Review

5. Bubbles of oxygen gas produced by photosynthesis
Review
Photosynthesis:
CO2 + H2O C6H12O6 (glucose) + O2
chlorophyll
Light

6. Starch = polymer of glucose monomers
Photosynthesis:
CO2 + H2O C6H12O6 + O2
chlorophyll
Light

7. White light
prism
White light

8. Sunlight is a mixture of
Light travels in waves
Sun
Sunlight is a mixture of
many wavelengths
Fig. 8.02

9. Shorter light waves have the more energy than longer waves
High energy waves
Shorter light waves have the more energy than longer waves
Low energy waves

10. White light
Green leaf looks green because it absorbs white and re-emits green light

11. Wavelengths that are best for photosynthesis Rate of Photo-synthesis
Photosynthesis: CO2 + H2O C6H12O6 + O2
Light
chlorophyll
Blue and Red light most effective in photosynthesis

12. Respiration C6H12O6 + O2 CO2 + H2O + Heat + ATP Photosynthesis:
Review
Respiration
C6H12O6 + O CO2 + H2O + Heat + ATP
Photosynthesis:
CO2 + H2O C6H12O6 + O2
Light
chlorophyll