plants and photosynthesis

• Factors that affect the rate of photosynthesis

  Light intensity

  Carbon dioxide concentration

  Temperature
• Testing a leaf for starch

  leaves that have done photosynthesis - starch stored in them

  presence of starch in leaves can be used as proof that leaf has done photosynthesis

  For this test, we use iodine

  starch present = blue-black

  caused by presence of chlorophyll