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Learners compare the weight of equal volumes of wax, water, and clay. Learners discover that since the wax weighs less than an equal volume of water, it is less dense than water and will float.

In this activity, learners discover the difficulty of ocean exploration by human beings as they investigate water pressure.

It's difficult to see convection currents in any liquid that's undergoing a temperature change, but in this Exploratorium Science Snack, you can see the currents with the help of food coloring.

In this two-part activity, learners investigate buoyancy, density and surface area as well as biodiversity and the relationship between the structure and function of organisms.

In this water activity, learners build boats that float and sink. First, learners listen to the book, "Who Sank the Boat" and practice making predictions throughout the story.

Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

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 hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.

Learners investigate how the temperature of water affects its density.