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BiologyDiscovery and Structure of Cells
Cells are the basic structural and functional unit of life. This module traces the discovery...
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Math in ScienceScientific Notation
The blue whale weighs approximately 190,000 kilograms, while a plankton weighs just 0.5 milligrams—a difference...
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ChemistryWater
Water is a truly unusual and important substance. The unique chemical properties of water that...
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