Batteries are a source of electricity. They use chemicals to produce electricity. They have two ends called the positive and negative poles.When these poles are connected to form an electric circuit, electrons will flow around to produce electricity.
A dry cell battery contains a chemical paste instead of liquid acid. Scientist call these electrolytes. An electrolyte helps conduct electricity because they contains ions or charged particals.
In this electro chemistry kit you will find some vinegar. This is a liquid acid and is used to power your LED.
• Learn about chemical batteries
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