1. Photosynthesis

2. Cell Energy:
Originally, the energy in food comes from the sun.

3. Photosynthesis is the process by which the energy of sunlight is converted into the energy of glucose

4. Organisms that CANNOT use the sun’s energy to make food—heterotrophs
Ex: animals and most microorganisms

5. Organisms that use light energy from the sun to produce food—autotrophs (auto = self)
Ex: plants and some microorganisms (some bacteria and protists)

6. Photosynthesis occurs on plant leaves

7. More specifically, photosynthesis occurs in the chloroplasts of leaf

8. in chloroplasts is the pigment _____________
The main energy
absorbing molecule
in chloroplasts is the pigment
_____________
CHLOROPHYLL

9. Carotenoids are plant pigments too.
Carotenoids are plant pigments too.
These look yellow, orange, and red.
As chlorophyll dies in the fall, the green color
fades and is replaced by carotenoids

10. The formula for photosynthesis: