Activity : Experimental Investigation - To show that light is necessary for photosynthesis
1. Take a potted plant and destarch its leaves by keeping it in dark for 2 days.
2. Take a black paper and cut a simple "L" shape in it by using a stencil.
3. Cover one leaf with this paper.
4. Leave the set up in sunlight for 4 - 6 hours.
5. Detach the leaf and test it for presence of starch.
6. You will observe that only the part of the leaf that could get sunlight through the cut out design as well as the other exposed parts of the leaf turn blue - black showing the presence of starch.
1. Take a potted plant and destarch its leaves by keeping it in dark for 2 days.
2. Take a black paper and cut a simple "L" shape in it by using a stencil.
3. Cover one leaf with this paper.
4. Leave the set up in sunlight for 4 - 6 hours.
5. Detach the leaf and test it for presence of starch.
6. You will observe that only the part of the leaf that could get sunlight through the cut out design as well as the other exposed parts of the leaf turn blue - black showing the presence of starch.
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