Materials:
* 1 raw egg
* 1 tall glass
* Water
* Table salt
Procedure:
1. Start with water: Fill the glass about 3/4 full with water. Carefully lower the egg into the water. Observe what happens. (It should sink.)
2. Add salt: Gradually add table salt to the water, stirring until the salt dissolves. Keep adding salt and stirring until the egg begins to float.
3. Observe: Once the egg floats, continue adding salt until the egg is floating completely submerged.
Explanation:
* Density and Buoyancy: The egg sinks because it is denser than water. This means it has more mass packed into the same volume.
* Saltwater and Density: Adding salt increases the density of the water. As the water becomes denser, it becomes more able to support the egg's weight.
* Archimedes' Principle: This experiment demonstrates Archimedes' Principle, which states that the buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. When the weight of the displaced water equals the weight of the egg, the egg floats.
Variations:
* You can use different objects instead of an egg, like a small piece of wood or a metal object.
* You can experiment with different liquids, like oil or syrup, to see how the buoyancy changes.
Safety:
* Use caution when handling glass.
* Supervise children during the experiment.
This experiment is a fun and easy way to learn about buoyancy and density. It's a great activity for kids and adults alike!
