The wonderful world of batteries

World’s first... Two metals in a frog’s leg made it twitch Italian physicist Alessandro Volta figured out there was an electrical signal, 1827

World’s largest... In Alaska Is bigger than a football pitch!

World’s smallest... In human bodies Stimulates nerve and muscle cells

Fruit Battery Plug the wires into the voltmeter Insert the metal into the fruit (as shown) Connect the crocodile clips to the metal Write down the reading from the voltmeter Repeat with a different metal

Results table Copper Aluminium Iron Zinc X Metal 1 Metal 2 Metal 1

Questions… How did the fruit produce a voltage? Why don’t we use fruit instead of batteries? How could we make our results more valid? Any other questions?

What you learned today: Two different metals are needed in a battery to make it work Which two metals are best for fruit batteries according to your data

Highest Voltage Achieved Results Group Highest Voltage Achieved Fruit 1 2 3 4 5 6 7 8 9 19 10 12