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Learners explore water's property of cohesion through two investigations.

Learners use M&Ms® (or any other multi-color, equally-sized small candy or pieces) to create a pie graph that expresses the composition of air.

This activity (on pages 16-23) lets learners measure each other's vital signs—the signs that help doctors understand what's going on in a patient body.

In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem.

Electrolysis is the breakdown of water into hydrogen and oxygen. This Exploratorium activity allows learners to visualize the process with an acid-based indicator.

Learners develop awareness and understanding of the daily air quality using the Air Quality Index (AQI) listed in the newspaper or online.

In this physical activity, groups of learners act as blood cells traveling through the circulatory system.

Working in groups, learners model the continuous destruction and creation of ozone (O3) molecules, which occur in the ozone layer.

In this Spanish-language chemistry activity, learners use simple materials to explore how fire extinguishers work to put out fires.