An egg sinks to the bottom if you drop in a glass of ordinary drinking water, but what if you add salt? The results are very interesting and can teach you some fun facts about the density.
What you'll need:
- One egg
- Water
- Salt
- A tall drinking glass
Instructions:
- Pour water into the glass until it is about half full.
- Stir in lots of salt (about 6 tablespoons).
- Carefully pour in plain water until the glass is nearly full (be careful to not disturb or mix the salty water with the plain water).
- Gently lower the egg into the water and watch what happens.
What's happening?
Salt water is denser than tap water, the denser the liquid is easier for an object to float in it. When you lower the egg into the liquid that falls in the tap water until the salt water, at which point the water is dense enough to make the egg float. If you were careful to add tap water to salt water, which have not mixed, allowing the egg to float incredibly the center of the cup.
