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ChemistryThe Periodic Table of Elements V
The periodic table allows us to easily view the 118 known chemical elements according to...
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Earth ScienceThe Rock Cycle
This module addresses the rock cycle, including the historical development of the concept. The relationships...
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Scientists and ResearchRuth Benerito
Wrinkle-resistant cotton is one of the most significant developments of the 20th century. In the...
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