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Earth ScienceOcean Currents
Ocean currents are responsible for transporting matter and energy across the ocean. They are driven...
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General ScienceDensity and Buoyancy
Density is a fundamental physical property of matter. This module introduces the concept of density,...
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BiologyPaleontology and the Fossil Record
Paleontologists study fossils to understand ancient organisms. While fossils might look simple enough, they provide...
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