Background Info: A potato battery is an electrochemical
battery. This battery takes chemical energy and turns it into
electrical energy. In this experiment, I will compare a
potato to other fruits.
Question: Which fruit or vegetable generates the most
electricity?
Hypothesis: I think that the grapefruit will generate the
most electricity because it is the most acidic.
Experimental Variables: grapefruit, potato, coconut, and
pineapple
Constant Variables: copper wire, pennies, voltmeter, and
galvanized nails