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In this activity, learners test the rate of ripening fruit and vegetables and use a chemical to inhibit the ripening process.

This is an activity (located on page 3 of the PDF under Self-Assembly Activity) about self-assembly, the ability of molecules to assemble themselves according to certain rules.

In this activity, learners explore trebuchet design. Teams of learners construct trebuchets from everyday materials.

In this activity, learners explore how engineers have met the challenge of keeping foods, liquids, and other items cool.