The Exploratorium is temporarily closed. Explore our online resources for learning at home.

Energy

See evidence of invisible cosmic rays with Cloud Chamber.

Skillets heat up differently: test their mettle.

Powder inside a fluorescent tube makes invisible light visible.

Magnets transfer energy back and forth, making the pendulum swing in unpredictable ways.

Power these appliances with your feet!

Sand traces a pendulum‘s motion.

Which wheel rolls downhill the fastest?

Linked pendulums can get one another going.

Wispy lines show the path of tiny, high-energy particles generated by cosmic rays.

Make a simple battery that will light an LED.

Build a rubber-band-powered rolling plastic water bottle.

Plunge into hydraulics with a pair of dueling syringes.

Pages