The Eggs Files
In days gone by, candling was the method used to judge the quality of an egg. Eggs were actually held up to a candle so that the inside could be seen. Eggs are now judged electronically. The egg is rotated and moved on high rollers over high intensity lights. The quality of the inside of an egg is established by the size of the empty space between the white and the shell. It is measured at the large end of the egg. The smaller the space, the higher the quality. An egg is also judged by its exterior cleanliness, shape, and texture.
Think eggs are easy to crack? Test that theory in this surprising experiment!
What to do:
- If possible, print out these directions. Read them through with your child before you begin.
- Take off all rings and hand jewelry.
- Stand over a sink.
- Invite your child to hold the egg nestled in one hand.
- Let her close her hand around the egg. Squeeze.
- What do you notice?
How to use:
This could make a good science project. Together, research what is in egg shells and what about their shape makes them strong. Test different ways of trying to crack an egg. Which ones work? Encourage your child to record all observations.
Let's Talk: Ideas to Explore Together.
- What do you think will happen when you squeeze the egg?
- What would happen if you put pressure on one small area?
The egg is hard to crush with one hand because the pressure you're putting on it is spread out evenly over the whole egg. Eggs are strong because of their shape.