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In this activity about humans and space travel (page 1 of PDF), learners compare and contrast the behavior of a water-filled plastic bag, both outside and inside of a container of water.

In this activity, learners use tinfoil to build and test their own boats - which designs will float, and which will sink?

In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.