Contents
Key Stage 3
Meaning
Starch is a complex carbohydrate found in food.
About Starch
- Starch is made of many glucose molecules bonded together.
- Starch is an important part of a balanced diet.
Starch Molecule
- Starch is made of hundreds of glucose molecules bonded together.
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| A starch molecule made of many smaller glucose molecules. |
Starch in Foods
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| Bread makes part of a balanced diet because it has a lot of stored energy we can use. | A balanced diet might contain pasta for energy. | Potatoes are an excellent source of energy in a balanced diet. | Rice is a very important part of many people's balanced diet. |
Testing for Starch
- Starch can be detected using Iodine Solution.
Method
- 1. A small sample of food is placed on a spotting tile.
- 2. A drop of Iodine Solution is added to the food sample.
- 3. If the Iodine solution turns from orange to blue-black then the food contains starch.
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| Iodine solution is an orange liquid. When the iodine solution is added to starch the iodine solution turns from orange to blue-black. |