2. Materials you will need:
• Table Salt
• Two Jars
• A Tablespoon
• Warm Water
• Cold Water
• Two Eggs
1. Fill two glasses with
water
2. Add 6 tablespoons of
salt to one of the glasses of
water and mix well.
3. Place an egg in each of
the glasses.
4. Notice that the egg will
float in the saltwater but
sinks in the ordinary tap
water. That is because the
saltwater is denser than the
regular water.

3. In fresh water an egg can’t float
on water.

4. The saltwater has the additional mass of the sodium and chlorine
atoms that dissolve into the water. In other words, the salt water
that we create has more stuff in it and is much denser than
ordinary water.

6. So how can we prove that the saltwater is denser than
ordinary water? By understanding that the higher the
density of a fluid, the easier it is for things to float in it.

9. The salt covered the egg.

10. This same principle applies to people swimming in
oceans or salt water lakes. The average person
will sink in ordinary water but can float like a boat
in saltwater. The Dead Sea is 33% salt by mass.
People find it very odd how “floaty” they are when
they swim in the Dead Sea (by the way, the high
salt content makes it hard for things to live in the
Dead Sea water and hence the name, “Dead”
sea).
You might not know this but skinnier or more
muscular people are denser than fatter people.
Some championship swimmers for instance, will
sink in salt water while heavier people will still
float.

11. Water is everywhere. It's in the air we breathe. It's in our
sink faucets, and it's in every cell of our body. Water is an
unusual substance with special properties. Just think about
the wonder of water: