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

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 experiment, learners float colored ice cubes in hot and cold water.

In this activity, learners investigate convection by using food coloring and water of different temperatures.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.