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Earth ScienceThe Nitrogen Cycle
This module provides an overview of the nitrogen cycle and the chemical changes that govern...
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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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ChemistryKinetic-Molecular Theory
Over four hundred years, scientists including Rudolf Clausius and James Clerk Maxwell developed the kinetic-molecular...
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