A bit more work on energy; calculating the calorific value of crisps.
First find the mass of your crisp
Then add a certain amount of water to a boiling tube
Take the temperature of the water
Set fire to the crisp and heat the water with it
You have to burn all of the crisp keeping it under the boiling tube at all times
Check the temperature after heating
And then do your calculations
There were four different crisps to do
So careful measurements were needed for a valid comparison
And lots of calculations but in the end the cheezy Wotsits won!