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Make a Human Scale Ladder
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In this quick activity about size and scale (on page 2 of the PDF under What's Nano?
Rate It: Working With Zero and Negative Numbers
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In this activity, learners will rate the day, a book, or something else on a scale from -2 to 2. This activity works well for groups of all ages.

Scaling an Atom
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In this activity, learners make a scale model of an atom to see how big or how small an atom is compared to its nucleus. Learners will realize that most of matter is just empty space!

Incredible Shrinking Shapes
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In this activity, learners get hands-on experience with ratios and scaling while making their own jewelry out of recycled plastic containers.