1. carbon dioxide + water glucose + oxygen
Photosynthesis
Process plants utilise to produce their own food
Take in: water and carbon dioxide
Produce: oxygen and glucose
(light energy)
carbon dioxide + water glucose + oxygen
(chlorophyll)
(light energy)
6CO2 + 6H2O C6H12O6 + 6O2
(chlorophyll)

2. But how does it all happen? First: look at the leaf structure.....

3. cuticle
cuticle
upper epidermis
palisade mesophyll
spongy mesophyll
xylem
air pocket
phloem
lower epidermis
stoma
guard cell

4. Light-dependent reaction: -light energy converted to chemical energy
6CO2 + 6H2O C6H12O6 + 6O2
(chlorophyll)
Light-dependent reaction:
-light energy converted to chemical energy
-water split into oxygen and hydrogen
sunlight
H2O H+
Light-independent reaction: hydrogen from water and carbon dioxide react to form glucose
C6H12O6
CO2 O2

5. How do plants use glucose?
Convert into cellulose for growth
Convert to other sugars to transport to other parts of the plant
To produce oils and proteins
Convert to starch for temporary storage in the leaf (on sunny days when photosynthesis rate is very high)
Convert back into energy via respiration

6. 
carbon dioxide + water
glucose + oxygen
= respiration!

8. Photosynthesis v respiration
What determines the rate of a plant’s respiration and photosynthesis?
Conditions
Photosynthesis v respiration
Overall result
Dark
Respiration
No photosynthesis
Oxygen taken in
Carbon dioxide given out
Dim light
Photosynthesis rate equals respiration rate
Neither gas is taken in or given out as each cancels the other out
Bright light
Photosynthesis rate greater than respiration rate
Carbon dioxide taken in
Oxygen given out