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00:02:00
See the subtle, mesmeric effects revealed by slow-motion observation of three iconic exhibits: Circling Wave Umbrella, in which spinning fabric forms pockets of swirling air; Rift Zone, a miniature geothermal landscape created by air bubbling through fine sand; and Vortex, a swirling vortex of water in a hydrodynamic dance with gravity.

00:03:53
Join Exploratorium educator Ken Finn as he unlocks the mystery behind the black sand (a.k.a. magnetite) at Ocean Beach. This piece explores the origin of magnetite in the Sierra Nevada mountains, its journey down the Sacramento and San Joaquin rivers to the Bay, and the interesting physical properties of this mineral, plus some fun things you can do with it.

00:00:36
See slow-motion footage of flames licking through ice during a demonstration by Eric Muller of the Exploratorium's Teacher Institute. Can you guess what he added to the bottom of the vessel before lighting it?

00:09:29
Newton’s laws were never so tasty. Exploratorium staff educator Don Rathjen demonstrates concepts about force using a file folder and a marshmallow.

00:00:40
An introduction to the stripped-down motor, a simple and easy-to-make version of the electric motors found in toys, tools, and appliances.

00:01:16
A detailed description of the simple materials needed to make a stripped-down motor.

00:02:48
A step-by-step demonstration of how to make the stand for the stripped-down motor.

00:05:16
A step-by-step demonstration of how to make the coil for the stripped-down motor.

00:01:41
How the stripped-down motor works, including a discussion of how electricity and magnetism combine to drive the machine.

00:01:26
Troubleshooting tips for making sure your stripped-down motor works well.