Make An Egg Float
No, this is not a riddle. You will also find out why it is easier to swim in salt water than fresh.
What You Need:
- An Egg
- 12 tablespoons or more of salt
- A glass of water
What To Do:
- Put an egg in a glass half full of water. Notice what happens. Add several tablespoons of salt, stir gently, and observer what happens.
- Remove the egg.
- Now to the half glass of salty water (10 tablespoons or more of salt), slowly fill the glass with fresh water. Don't stir. Gently lower the egg into the glass.
- In the fresh water the egg sank. As you added salt it started to float.
- When you added fresh water to the very salty water, the egg started to float in the middle.
- The denser the liquid the greater its upward lift (buoyancy). Salt make the water denser.
- When you add fresh water to the salty water, it remains on top. The egg sinks through it and floats on the lower, denser, salt water.