For 5th, 6th & 7th STD. Students Science Experiment: Raw or Boiled Egg?


Raw or Boiled Egg?
Surprise your friends and family with an easy science experiment that answers an otherwise
tricky question. Two eggs look and feel the same but there is a big difference, one is raw and
the other hard boiled, find out which is which with this fun experiment.
What you’ll need:
 Two eggs, one hard boiled and one raw. Make sure the hard boiled egg has been in
the fridge long enough to be the same temperature as the raw egg.
1. Spin the eggs and watch what happens, one egg should spin while the other
2. You can also lightly touch each of the eggs while they are spinning, one should stop
quickly while the other keeps moving after you have touched it.
What’s happening?
The raw egg’s centre of gravity changes as the white and yolk move around inside the shell,
causing the wobbling motion. Even after you touch the shell it continues moving. This is
because of inertia, the same type of force you feel when you change direction or stop
suddenly in a car, your body wants to move one way while the car wants to do something
different. Inertia causes the raw egg to spin even after you have stopped it, this contrasts
with the solid white and yolk of the hard boiled egg, it responds much quicker if you touch
This is a good experiment to test a friend or someone in your family with, see if they can
figure out how to tell the difference between the eggs (without smashing them of course)
before showing them your nifty trick.

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