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In this activity, learners discover how geologists use stratigraphy, the study of layered rock, to understand the sequence of geological events.

In this outdoor, sunny day activity, learners experiment with paper leaf models to discover how some desert plants conserve water.

In this activity, learners work in teams to investigate the relationship between mass, acceleration, and force as described in Newton's second law of motion.

Many people get water from a source deep underground, called groundwater.

In this activity, learners separate the components of Gatorade using a home-made affinity column.

Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.

Using simple, inexpensive items, learners build and test submarine models.

In this activity, learners work in teams build and launch rubberband-powered foam rockets.

In the wild, small crustaceans known as brine shrimp live in marine habitats such as saltwater lakes.