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 BatteryArticle on seawater battery to accompany this film.
Creative Science CentreVisit the virtual science centre packed full of things to make and do!