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Earth Science
The Rock Cycle
This module addresses the rock cycle, including the historical development of the concept. The relationships...
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Biology
Photosynthesis I
Through photosynthesis, plants harvest energy from the sun to produce oxygen and sugar, the basic...
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Earth Science
Natural Hazards and Risk
Tornadoes, earthquakes, tsunamis, and volcanic activity are all examples of natural hazards with the potential...
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