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Welcome to Season 2 of Science Sunday! Today we will be learning about density with this fun and easy experiment called the Rainbow Jar experiment. With a few simple ingredients that you probably have around your house you can witness the magic of density.
The first experiment we will be sharing with you explores density, density is the mass of a unit of volume in a material substance.
Isabella explains it wonderfully in the beginning of her video which is on our channel and linked below.
Isabella used two cups and a bunch of pom poms. In one cup she had a lot of pom poms in the other just a few. This demonstration helps her to explain density.
Here is how we explain it. Almost everything is made up of molecules, the pom poms represent molecules. The more molecules your item has the more dense it is (the less space there is between them) .
We are working with liquids in this experiment, each liquid has a different density which explains why they stack up on top of each other. Each liquid creates its own layer based on its density.
Let’s get started conducting this experiment.
Tall Clear Container (Mason Jar)
What to do:
- First, gather your ingredients including a clean clear container, we used a mason jar.
- Next, let’s start making our rainbow! The first layer to put in is honey make sure to pour it into the center of the container.
- Then, mix some food coloring in with light corn syrup, we used purple food coloring.
- After that, put in the dish soap, our dish soap is green but if you use blue that is fine too.
- Next, add in the water, regular tap water we colored blue, again if you used blue soap then color your water green.
- Then, add in our olive oil, we put a pretty thick layer.
- Lastly, using a dropper add rubbing alcohol which we colored red (that is a great peak at how density works, when you add the food coloring into the rubbing alcohol the food coloring sinks and sits at the bottom). We used a dropper and slid it into the jar on the sides to create a layer, if you shoot it in or if you pour it in you risk a chance of the alcohol picking up the color from the previous layers.
Check out our video here:
We would love to see you doing the experiments!
What experiment would you like to see us do? Let us know in the comments below.