Presentation on theme: "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."— Presentation transcript:
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.
In fresh water an egg cant float on water.
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.
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.
The salt covered the egg.
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.
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: