Wednesday, April 16, 2008

Testing plants for photosynthesis

As one of experiments this week we were looking at what would happen to geranium leaves if we put a piece of tin foil across and blocked the sun getting to the leaf. After a week we tested the leaf for the presence of starch (stained black by iodine). You can see a couple of amazing results where the foil prevented the leaf from carrying out photosynthesis and storing the products as starch...pretty convincing experiment!

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