Mystery #2Tier 2electricity / batteries / chemistry
What is really going on inside a battery to make electricity flow?
A battery just sits there, cool and still, with no moving parts you can see. Yet connect it up and it drives electricity round for hours, lighting bulbs and spinning motors. Nothing seems to stir on the outside. So what hidden thing inside a plain battery keeps shoving electricity along?
Your guess
What's your guess: what could be going on inside a battery to give electricity its push?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.