We investigated - How the body starts to break down food
- we learned that starch is used for energy. It is a complex sugar and can't be absorbed into the blood until it is broken down into simple sugars.
- we made a starch solution by mixing rice with water. When we added iodine the solution turned blue-black (this happens when iodine comes in contact with starch).
- we had fun making a saliva solution by rinsing water around our mouths and spitting it into a cup. When we added this to the starch solution and iodine the blue-black colour slowly disappeared, showing the starch had changed.
- we found out that we have an enzyme called amylase in our saliva and this starts to break down the complex sugars in starch into simple sugars.
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