The Rate of Photosynthesis

• As light intensity rises, so too does the rate of photosynthesis but at a certain point it will plateau
• As CO2 concentration increases, so too does the rate of photosynthesis but at a certain point it will plateau
• As temperature increases, the rate of photosynthesis increases until a certain point where it starts to decrease
• How is temperature a limiting factor for the rate of photosynthesis?

  Because the enzymes needed for photosynthesis to occur work slower at low temperatures and they will denature at high temperatures
• At what temperature do enzymes usually denature?

  45 degrees celsius
• Which law links light intensity and distance?

  The inverse square law
• In an experiment involving a plant and a lamp, how is light intensity affected as distance increases?

  Light intensity decreases
• Light intensity is proportional to 1 over distance^2
• How is a greenhouse an ideal environment for plant growth?

  • Heat is controlled
  • No pests or disease
  • Artificial light can be used
  • Fertilisers can be used
  • Carbon dioxide levels can be controlled (using a paraffin heater)