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Science - Middle Grades


Metric system

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Secret Worlds: The Universe Within
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A repeating slide show of images at different magnifications from the scale of the universe to the scale of nucleons.
Science, Optics and You
Detailed list of metric system units, symbols, and prefixes
Detailed list of metric system units, symbols, and prefixes
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Tables of SI base and derived units, metric prefixes. This page includes a diagram of how the base and derived SI units relate to each other.
US Metric Association
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