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CK-12 Foundation

Ck 12: Life Science: 2.3 Cell Theory

For Students 9th - 10th
Learn about the cell theory and levels of organization in a multicellular organism.
Article
Famous Scientists

Famous Scientists: Theodor Schwann

For Students 9th - 10th
Learn about German Physiologist, Theodor Schwann, one of the scientists who helped develop the cell theory.
Unit Plan
CK-12 Foundation

Ck 12: Earth Science: Wegener and the Continental Drift Hypothesis

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] How Wegener's hypothesis of continental drift was refined.

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