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In this activity, learners investigate the different salinity levels of oceans, rivers and estuaries.

In this activity, learners use a laser pointer to project a microscopic image of a liquid sample suspended from the tip of a syringe.

In this activity, learners use a pneumatic trough (see related activity) to generate and collect pure oxygen.

In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.

This experiment allows learners to experience a small scale "epidemic," demonstrating the ease with which disease organisms are spread, and enables learners to determine the originator of the "epidemi

In this outdoor, beach activity, learners use tennis balls, water balloons and other simple devices to investigate the movement of waves and currents off a sandy beach.