Science Projects And Inventions

YOU NEED:

• A tall glass
• A water jug or a pitcher
• Several table spoons of salt
• A fresh egg
• A spoon

An egg can be made to float halfway down a glass full of water. Seems unbelievable? It can be done. Here is how to do it. Take the tall glass and fill half of it with water. Add several table spoons of salt and keep stirring until the salt is totally dissolved. Take the fresh egg and drop it in the glass. It will tend to float on the surface. Hold a spoon on the surface and ever so carefully pour fresh water over it. Use the bottom of the spoon to spread the water gently over the salt solution you have created. The egg now floats mysteriously in the middle of the glass which seems to hold just plain water. Place the glass on a shelf or the mantel and surprise visitors or friends.

HOW DOES IT WORK?

The specific gravity or the density in the lower half of the glass is raised by the salt. This allows the egg to float in the middle of the glass because the water in the upper half of the glass does not have salt. Therefore the floating egg cannot rise through it