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In this activity (on page 2 of the PDF), the learner places a golf ball between salt water and colored fresh water. The golf ball is not as dense as the saltwater.

In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.

In this activity, learners explore and compare the buoyant properties of materials found in nature and in human-made materials.

In this activity (located on page 3 of the PDF), learners investigate the way water moves and how we can control and direct water.

In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities.

What keeps bubbles and other things, like airplanes, floating or flying in the air?

Learners add different liquids (water, salt water, alcohol, and detergent solution) to water and observe the different ways the different liquids combine with water.

In this activity, learners build a hovercraft using a paper plate, cup, and simple motor.