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Testing for Starch:
A Science Experiment

This is a fun and easy science experiment by itself or it can go very well with a study on nutrition.


waxed paper
tincture of iodine*
different kinds of food such as:
Cut potatoes
Cut apples
Orange segments


1. Place the foods on the waxed paper.

2. Place a drop of the tincture of iodine onto each food.

3. The foods containing starch will turn purple where the iodine touches them.

*Check your first aid kit or the local pharmacy for tincture of iodine.


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