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Learners see that a carrot slice sinks in fresh water and floats in saltwater.

In this activity, learners will build thier own balance scale. Learners will explore weight and comparison through this activity.

In this physics activity, learners will explore buoyancy.

Learners see convection currents in action in this highly visual demonstration. Sealed bags of colored hot or cold water are immersed in tanks of water.

In this activity, learners create a kind of balance device using a wire coat hanger, some string, and paper cups.