PS1.A: Structure & Properties of Matter
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Atoms, Isotopes, and Ions
$10.95 – $75.95Model the sub-atomic particles in atoms, isotopes, and ions.
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Brittle Bones: A Density Problem
$17.95 – $140.95How does low bone density increase the risk for bone fractures?
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Enzymes and Lactose Intolerance
$15.95 – $110.95How do enzymes help people with lactose intolerance?
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