(Pondweed) Investigating Photosynthesis

• What can the rate of photosynthesis be affected by 


  -Light intensity

  -Temperature

  -Availability of CO2

  -Availability of water

  -Availability of chlorophyll
• How can you maximise the rate of photosynthesis 


  -More light

  -Heating near optimum temp

  -More CO2

  -More H20
• How can you measure rate of photosynthesis 


  -Rate of oxygen being produced (bubbles produced)

  -Rate of CO2 uptake

  -Rate of glucose production
• How is the light intensity varied in this practical 


  Increasing the distance of the lamp from pondweed
• What solution do you fill the boiling tube with

  Sodium hydrogen carbonate solution
• Why should the end of the stem be pointing towards the top of the boiling tube 


  To see bubbles being produced
• Should the end of the stem be above or below the solution


  Below
• What else can you use instead of just counting the bubbles

  Gas syringe
• What are the products of photosynthesis 


  Oxygen + Glucose