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General ScienceTemperature
An introduction to the relationship between energy, heat and temperature. This lesson compares the 3...
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Scientists and ResearchRuth Benerito
Wrinkle-resistant cotton is one of the most significant developments of the 20th century. In the...
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Earth ScienceHistory of Earth's Atmosphere I
This module looks at how the Earth's atmosphere has changed since the planet came into...
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