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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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Process of SciencePeer Review in Scientific Publishing
Peer review is an important part of the process of science. This module describes the...
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Earth ScienceThe Hydrologic Cycle
Powered by the sun, water constantly cycles through the Earth and its atmosphere. This module...
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