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In this game, learners explore the different sizes of things in the world. In this Twister-like game, learners must place a hand or foot on a circle of the right scale - macro, micro, or nano.

In this activity, learners investigate how inkjet printers produce tiny, precise drops of ink.

In this activity, learners are challenged to calculate their own weight on various planets using a scale and calculator. Older learners may be challenged to do so without using calculators.

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.