Equipment: Beaker, heat-proof mat, tripod, bunsen, gauze, test tube, pipette, leaf, ethanol, tile and iodine solution
Method:
1. Boil water and place it in the beaker.
2. Place it on top of a gauze on a tripod. Place the Bunsen burner under on heatproof mat.
3. Place a leaf in the water to kill it and stop photosynthesis. Leave for 1 minute
4. Then place the leaf a test tube of ethanol and place that in the hot water for 10 minutes. Turn off the Bunsen. This extracts the chlorophyll and makes the colour change more obvious
5. Place the leaf back in the hot water for another minute. This softens the leaf so it can be spread out on the tile.
6. Spread the leaf out on a tile. Cover in iodine solution.
8. If starch is present it will turn blue-black if not it will remain orange.
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