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In this activity, learners play a card game that explores the relative sizes of various objects. Learners compete to organize their hand of cards into lists of objects from largest to smallest.

In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

In this activity, learners play a card game that explores different size scales--macro, micro and nano.

In this activity, learners discover that a material can act differently when it's nanometer-sized.

In this artistic activity, learners blow up a smaller picture into a larger one, by using a grid.

In this activity, learners investigate what happens when you build up static electricity on plastic balls.

In this activity (on pages 22-33), learners do the kind of work genetic scientists do, sorting and comparing (images of) genetic material strands called chromosomes.