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In this activity, learners use simple items to construct a device for indicating air pressure changes.

In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

In this activity, learners use simple items to construct a device for indicating air pressure changes.

In this weather forecasting activity, learners determine the location of cold and warm fronts on weather plot maps.

In this activity, learners will listen to as many radio stations as possible to discover that AM radio signals can travel many hundreds of miles at night.

In this experiment, learners examine the way oil affects bird feathers and test different cleanup methods to find out which works best.