Experimenting with Lemon Cells!

In Natural Sciences this term the Grade 8's discussed different components that make up an electric circuit.  One component is the input device. At school we look at cells and batteries.  It was interesting for us to find out that a fruit, for example a lemon, holds potential energy, just like a battery, although a very small amount.  

The experiment is very basic:

• Squeeze the lemon to make it juicy.  
• Insert two different conducting materials, for example zinc and copper (nails or coins will do the job).  
• Connect a voltmeter to measure the voltage produced.