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

Learners observe a bottle containing water and oil. They are invited to pick up the bottle and mix the contents together.

In this physics activity, learners will explore buoyancy.

Experiment with liquids of different densities and create liquid layers. For example, oil and water have different densities: oil floats on water because it is less dense than water.

In this activity (on page 2 of the PDF), learners explore surface tension by adding pennies to cups which are "full" of plain water or soapy water.