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Earth ScienceOrigins of Plate Tectonic Theory
The theory of continental drift was the first step toward plate tectonic theory, which became...
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ChemistryProperties of Gases
This module describes the properties of gases and explores how these properties relate to a...
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ChemistryStates of Matter
There are many states of matter beyond solids, liquids, and gases, including plasmas, condensates, superfluids,...
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