Science at home! Fun homemade experiments for the little ones. Today we will learn about the Density and Buoyancy!
But before we begin, we will review what the concept of Density and Buoyancy is!
What is Density?
That an object floats or sinks in a liquid depends on the relation between the densities of the object and the liquid. The density of a substance is obtained by dividing its mass by its volume. Volume is the space it occupies and mass is easily measured with a weight or scale. If we divide the mass between the volume density is obtained.
What is buoyancy?
Buoyancy is the ability of a body to stay within a fluid. A simple way to explain it is that for an object to float it is necessary that the push-up is greater than the weight and that depending on the density of the object and the fluid it floats more or less.
# Yes now! Let's go with the experiment:Materials:
- A glass
- Water
- Children's oil
- Alcohol
- Aluminum Foil
- A plier
Procedures:
- Pour a quantity of water into a transparent glass, add an amount of children's oil and finally an amount of alcohol, the latter must be poured carefully so that it does not mix with the water and is separated by the oil.
- Then with the aluminum foil you can see some balls of different sizes, if you prefer so that some of them are more compact you can press them with the pliers so that they can be crushed even more.
- Then finally put the aluminum balls inside your glass, you will notice that some float and others are submerged at the bottom of the glass.
What has happened?
The density of the ball determines whether it sinks or floats. If we squeeze the little ball this will have more air inside and will have lower density, therefore floating on alcohol and oil.
If we tighten more the ball with the pliers we increase its density and we achieve that it sinks to the bottom of the glass where the water is.
I hope that this article has been of your interest and help and I hope you in my next post.
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As always, great kids' project!
Thanks for sharing this!