1. First, prepare two cups, eggs and salt.

2. Take a glass of water and put an ordinary egg. We can see that the eggs are sinking.

3. Add the right amount of salt to the water, and then add the eggs. At this time, the eggs are suspended in the water.

4. Continue to add salt and eggs to the water.

5. The egg finally floats on the salt water, because the density of the egg is less than that of the salt water at this time, and the buoyancy borne by the egg when it is completely immersed in the water is greater than the gravity of the egg itself, so the egg will float on the water.