
Tag: lemons
How to make your own invisible ink with lemon juice (and other secret stuff) experiment

Invisible ink has been used by spies for centuries. At the time of the Revolutionary War, invisible ink made of a mixture of ferrous sulfate and water was commonly used. The secret messages were often written in between the lines of a normal letter. When heat or a special chemical (such as sodium carbonate) were…
Lemon battery experiment – if life gives you lemons, make a battery!

Batteries store chemical energy that can be transmitted as electrical energy through various components in a circuit. You can think of the circuit as the path the electrons (electricity) take. The path has to have no breaks in it and it much be a path made of a material that will allow the electrons to…