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Pesticides and Eggshell Thinning
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This lab activity is about toxic substances like pesticides and their effects on biological systems. The activity starts with an introduction of how birds sequester calcium to make an egg.
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.
Dinosaur Bone Experiments
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This activity features two connected hands-on activities about dinosaur bones.