1. Photosynthesis

2. Photosynthesis
Photosynthesis is the process by which plants make glucose.
This occurs during the day i.e. when there is light

3. Respiration
Respiration is the process by which plants breakdown glucose to produce energy
This occurs in all cells
This occurs during the day and at night

4. Photosynthesis and respiration

5. Leaves are the site for photosynthesis and their structure is specialised for this role.
They are thin and flat for rapid diffusion of gases
They have a large surface area to trap sunlight.
They have veins to transport substances to and from leaf.
They have a waxy cuticle to minimise water loss
A petiole holds up the leaf to trap sunlight

6. Chloroplasts contain chlorophyll which enables photosynthesis to proceed.
Air spaces in the spongy mesophyll allow gases to diffuse rapidly
They have stomata that let the gases in and out

7. The process of photosynthesis
Carbon dioxide + water -> glucose and oxygen
6 CO H2O -> C6H12O6 + 6 O2

9. Limiting factors Amount of light Amount of carbon dioxide Temperature
Amount of chlorophyll

10. Light and photosynthesis

11. Carbon dioxide and photosynthesis

12. Temperature and photosynthesis

13. Summary of environmental effects on photosynthesis and respiration

14. Role of the stomata

15. Stomata (cont.)

16. How guard cells work