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

Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.

In this classic hands-on activity, learners estimate the length of a molecule by floating a fatty acid (oleic acid) on water.

In this activity, learners calculate the percentage of oxygen in the atmosphere by using steel wool's ability to rust.

In this activity, learners measure the amount of carbon dioxide in a carbonated drink.

In this chemistry meets cooking activity, learners compare the stability of egg white foams with various additives.

In this activity, learners prepare four polymer elastomers and then compare their physical properties, such as texture, color, volume, density, and bounce height.

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

Learners measure a bottle full of air, and then use a vacuum pump to remove the air. When they re-weigh the bottle, learners find the mass is about 0.8g less.