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

In this activity, learners experiment with their voices and noisemakers to understand the connections between vibrations and the sounds created by those vibrations.

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 Cyberchase activity, have fun measuring volumes and enjoy a delicious shake.

In this activity about water solubility and density, learners use critical thinking skills to determine why water can dissolve some things and not others.

This activity was designed for blind learners, but all types of learners can utilize it to investigate volume, mass, and density.

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

Learners investigate how the temperature of water affects its density.

Learners see that a can of regular cola sinks while a can of diet cola floats. As a demonstration, bubble wrap is taped to the can of regular cola to make it float.