Chemistry

These hands-on activities investigate phenomena that arise from molecules and atoms interacting and transforming in different ways. Build a battery and light up an LED without much more than the change in your pocket.
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All content in “Chemistry”

Chemistry Introduction

Chemistry and chemical reactions can be electric or explosive, sweet or sour, powerful or perplexing.

Penny Battery

Can you light up a room with just five cents? A battery is a device that converts chemical energy into electrical energy. This activity, developed and demonstrated by Julie Yu, director of the Exploratorium Teacher Institute, shows you how to build a battery strong enough to power an LED for a whole day—using nothing more than a few pennies and a salty solution. Watch the videos to learn how to build a battery of your very own, and light the way for other chemistry lovers.