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In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.

Using indirect methods, learners determine the shape and size of a piece of carpet hidden under a piece of plywood.

In this activity, learners build edible models of Jupiter and Earth to compare their sizes and illustrate the planets' internal layers.

This is an activity (on page 2 of the PDF under Surface Area Activity) about surface area to volume ratio.