The hypothesis is that rice, raw potato, apple and flour will turn the iodine dark, as these foods contain starch.

You will cover your work space with newspaper, stir equal amounts of iodine and water into one jar, pour equal amounts of the solution into the other five jars, place a piece of potato on the newspaper, and apply a few drops of the iodine solution to the potato and each food sample.

You will need newspaper, six glass jars, tap water, twenty plastic plates, twenty eyedroppers, twenty starch charts, one-ounce bottle iodine tincture, and small samples of food such as butter, rice, cheese, meat, raw potato, apple, salt, and flour.

After five minutes, the results showed that rice, raw potato, apple and flour turned the iodine dark, indicating that these foods contain starch.

This science project is interesting because it allows students to explore the presence of starch in common foods.

Experiment variations to consider include testing different types of food, testing different amounts of iodine solution, and testing different amounts of time.

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