Process that uses energy to change carbon dioxide and water into glucose and oxygen
Photosynthesis
1. Uses energy
2. Changes carbon dioxide and water
3. Produces glucose and oxygen
Photosynthesis
Takes place in chloroplasts in green plant cells
Chloroplasts contain pigments like chlorophyll that absorb light
Energy is transferred to the chloroplasts from the environment by light
Photosynthesis is endothermic - energy is transferred from the environment
Word equation for photosynthesis
carbon dioxide + water -> glucose + oxygen
Symbol equation for photosynthesis
6CO2 + 6H2O -> C6H12O6 + 6O2
Ways plants use glucose
Respiration
Making cellulose
Making amino acids
Stored as oils or fats
Stored as starch
Limiting factors
Intensity of light
Concentration of CO2
Temperature
Any of the three limiting factors can stop photosynthesis from happening any faster
The limiting factor depends on the environmental conditions - at night it's light, in winter it's often temperature, if warm and bright enough it's usually CO2
Chlorophyll
Can also be a limiting factor of photosynthesis
Amount of chlorophyll can be affected by disease or environmental stress, reducing the rate of photosynthesis
