Having a Cracking time

3rd class Holly


During engineers week we were learning about bridges. If you have a look around you will see that arches are used to build some bridges. Arches are said to be very strong. We put this to the test using eggs and as you can see, we had an egg-citing time! When you stand on a carton of eggs your foot is big enough to spread the pressure of your weight around all of the eggs and their arch structure prevents them from cracking. Apparently if you squeeze an egg in your hand it shouldn’t crack. If you completely surround the egg with your hand, the pressure you apply by squeezing is distributed evenly. We had a go and as you can see that’s eggs-actly what happened, the eggs all survived!




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