Practical Science

Our Year 7 pupils are studying plants at the moment. Today they established that plants store starch (made from the glucose they make by photosynthesis). They took a leaf and boiled it for 2 minutes to soften it, before immersing it in ethanol which was in a test tube in a water bath. Finally they put some iodine solution on it which turned black, proving starch was present. They then took a sample of a rhubarb leaf and looked at it closely under a microscope. They could clearly see the stomata present. At Lockers Park we find our pupils learn more when they do and see things for themselves.