1. The wonderful world of batteries

2. 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

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

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

5. 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

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

7. 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?

8. 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

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