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Life Size: Line 'em up!
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In this activity on page 1 of the PDF, learners compare the relative sizes of biological objects (like DNA and bacteria) that can't be seen by the naked eye.
Sugar Crystal Challenge
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This lesson focuses on surface area and how the shape of sugar crystals may differ as they are grown from sugars of different coarseness.
Cookie Surface Area
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This is an activity (on page 2 of the PDF under Surface Area Activity) about surface area to volume ratio.