So we screwed copper and zinc pieces into fruit and vegetables and then measured the results on a voltmeter. I have an 8 and 6 year old so wasn't going to get too complicated. The hypothesis was that the more acidic produce, like lemons and grapefruit, would make the best batteries and would read higher on the voltmeter. But that didn't happen. Everything read about 1, including the celery and avocado.
Do we just say that the hypothesis was incorrect according to our measurements, or do we need a reason. I don't understand why everything was reading 1, including a chunk of celery. So alkaline produce makes just as good of a battery as acidic? Does that make sense?
