Libraries / Physical Sciences

Explore the characteristics of solids, liquids, and gases — and compare them all with each other — thanks to the scientific detective...
More Details

Revised Why does the sound of a passing train suddenly change as the train goes by? A young scientist, Christian Doppler, was curious about this...
More Details

See how materials on surfaces determine what is absorbed or reflected, and how different materials control echoes and reverberation.
Preview ClipMore Details

Musical instruments illustrate the relationship between the pitch, frequency, loudness and amplitude of sound waves and explains how and why sounds...
More Details

We experience sounds all around us. Pleasant and unpleasant, high and low, loud and soft sounds. Through live action and graphics, this film...
More Details

Investigator Alligator and Mr. E get together once again, to investigate the basics of sound. As they study many different types of sounds and the...
More Details

Since ancient times, people have wondered about the stars and have searched for ways to understand them. We have learned much about our galaxy by...
More Details

Animation and live-action experiments demonstrate the causes, effects and applications of static charges and their relation to an electric current and a complete circuit.
More Details

We live in a sunlit world where every day the sun brings light and life to the earth we live on. Sunlight brings out the color of things around us....
More Details

Investigator Alligator’s friend, Mr. E, has a problem; he’s trying to hang a picture of Al on the wall, but it falls down after only a...
More Details

USING ENERGY teaches Zog that people use energy in one of two main ways: by moving heat from one place to another (conduction, convection or...
Preview ClipMore Details

In “The Case of the Mysterious Puddle of Water,” Investigator Alligator learns that volume means the space that matter takes up. This...
More Details