Recorded in 2007.
This video should be used with the article linked to below.
When two different metals are placed in a salt solution (an electrolyte) the chemistry produces a voltage. This is called a cell. By wiring up a number of these cells we can make a battery and use it to power electrical circuits.
Links To Other Information:Seawater Battery
Article on seawater battery to accompany this film.Creative Science Centre
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