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ChemistrySubstances
This module explores substances through hypothetical and real-world examples. Substances are broadly classified as pure...
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Scientists and ResearchTracking Endangered Jaguars across the Border
This module offers an in-depth profile of wildlife biologist Sergio Avila and his work to...
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PhysicsGravity
Isaac Newton's description of gravity was not the first explanation of this phenomenon, nor was...
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