The Floating Egg Experiment (Buoyancy)

Ever wondered how objects float in water? This is mainly due to the density of water, or loosely put, due to how tightly the matter of a mixture is packed together.  The more dense or thicker the substance, the more easier objects will float in it.  Here is a simple experiment you can try at home and make objects float in water.

Materials Needed:
3 Eggs
Water
Spoon for Stirring
Salt
Measuring Spoon or Cup
3 Empty Tall Glasses

Procedure:
1.  Get 3 eggs from the refrigerator and allow them to settle to room temperature.
2.  Pour equal amount of water into the glasses until they are almost half full.

3.  Mix 2 tsps. of salt into Glass#2 and 6 tsps. of salt into Glass#3. Stir thoroughly until the salt is completely dissolved.

4.  Carefully, drop each egg inside each glass carefully and see what happens.  In which glass does the egg sink or float? The more salt you add into the water, the more dense it will become. The more easier objects will float.  When the egg is denser than water, it will sink to the bottom.  The egg will stay at the middle of the glass when it has about equal density with the water.  When the water becomes more dense than the egg, then the float will float all the way to the top.

5.  Try experimenting with different objects and different amounts of salt. Observe what happens.

Please note that the amount of salt may differ depending on the size of the glass and amount of water inside.

Note:  You can use this experiment to check the freshness of an egg.  If an egg is stale, it will float in water due to the formation of gas inside the egg when it is going bad.