1. The overall process of photosynthesis produces sugars that store chemical energy.
6CO2 + 6H2O  C6H12O6 + 6O2

2. Photosynthetic organisms are producers.
Producers make their own source of chemical energy (food).
Plants use photosynthesis and are producers.
Photosynthesis captures energy from sunlight to make sugars.

3. Chlorophyll is a molecule that absorbs light energy.
chloroplast
leaf cell
leaf
Chlorophyll is a molecule that absorbs light energy.
In plants, chlorophyll is found in organelles called chloroplasts.
Chlorophyll reflects green
light!

4. Photosynthesis in plants occurs in chloroplasts.
stroma
grana (thylakoids)
Photosynthesis takes place in two parts of chloroplasts.
grana (stack of thylakoids)
Stroma (chloroplast fluid)

5. There are 2 stages of photosynthesis
Light Dependent Reactions (uses light)
(Light Reactions)
Light Independent Reactions (doesn’t use light)
(Dark Reactions)

6. The light-dependent reactions capture energy from sunlight.
take place in thylakoids
water and sunlight are needed
chlorophyll absorbs energy
energy is transferred along thylakoid membrane then to light-independent reactions (dark reactions)
oxygen is released

7. The light-independent (dark) reactions make sugars.
take place in stroma
needs carbon dioxide from atmosphere
use energy from light reactions to build a sugar in a cycle of chemical reactions

8. The equation for the overall process is:
6CO2 + 6H2O  C6H12O6 + 6O2
C6H12O6
granum (stack of thylakoids)
thylakoid
sunlight
1 six-carbon sugar
6H2O
6CO2
6O2
chloroplast 1 2 4 3
energy
stroma (fluid outside the thylakoids)