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Iron in Cereal: Find iron in your food!
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Learners investigate an iron-fortified cereal by stirring it with a strong magnet. They discover that metallic iron is present in some cereals.
Heavy Metal
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In this activity (on pages 25-31 of PDF), learners soak sponges with different amounts of plaster of paris to simulate different levels of calcification in bone formation.
Bendy Bones
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In this activity (on pages 19-24 of PDF), learners soak chicken bones or eggshells in vinegar for several days.