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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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ChemistryEarly Ideas about Matter
Tracking the development of our understanding of the atomic structure of matter, this module begins...
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ChemistryThe Periodic Table of Elements I
The modern periodic table is based on Dmitri Mendeleev’s 1896 observations that chemical elements can...
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