Why nothing oil and water mix? The answer begins with “molecules.” Molecules are the an extremely tiny particles that make up everything. Some substances space made that a lot of molecules. They space heavier, or an ext dense, 보다 others. Think of document cups v marbles in them. One cup has four marbles. The various other cup is half-filled with marbles. The marbles in the half-filled cup are close together. That’s referred to as density, and it is heavier.

You are watching: What is denser water or oil


Water molecule are just attracted come water molecules. Oil molecule are only attracted to other oil molecules.

Water is more dense (heavier) than oil for this reason they can not mix. Oil floats above the water.

See what that looks choose in this straightforward experiment.

Four ingredients:


food coloring

food preparation oil

table salt


Step 1: fill a glass around two-thirds full with insanity water.

Step 2: Add a couple of fall of food coloring and stir.

Step 3: Add cooking oil to virtually fill the glass. Watch carefully!

Now because that the really neat part!

Step 4: Use a salt shaker to pour salt over the mixture. Clock the oil fall and rise. Continue adding salt to save the motion going.

What is happening? this is the science:

Salt is an ext dense (heavier) than oil or water so that is going to sink. Together the salt sinks it traction blobs the oil down with it. As soon as the salt starts come dissolve, it releases the oil. The oil rises earlier to the surface. You acquire dancing oil!




Learn more about the density of oil in the following experiment.



Make a Rainbow in a Jar



1) Honey

2) irradiate corn syrup (add food coloring)

3) Blue or eco-friendly dish soap

4) food preparation oil

5) Rubbing alcohol (add food colour to contrast with the food soap)


You’ll likewise need:

A high clear container with a tight-fitting lid

A pipette or a drinking straw

A long-term marker or grease pencil


Step1: Prepare your container.Measure the height of your container and also divide by six. Give the oil 2 times as much space as the other ingredients. Mark the sections on the container v the marker.

Step 2: Prepare your ingredients.Determine your shade scheme and add food coloring to the clear liquids. Note: food preparation oil is not clear, and it i will not ~ mix with food coloring.

Step 3: gradually pour each ingredient in the order castle are detailed above. Aim because that the facility of the container together you pour ingredients 1 through 4.

Don’t to water number 5 right into the center! The alcohol needs to be tenderness dripped under the inside wall of the container using a pipette or a drinking straw. (See just how to use a straw together a pipette below.)

Something unexpected is going come happen! check out if you can guess by looking at the perfect Rainbow in a jar photo.

What is happening? this is the science: The liquids stay separate due to the fact that their densities room different. The ingredient are added in bespeak so that the most dense liquid is on the bottom. Oil is the least dense of the liquids, so that floats come the top.

How to use a straw together a pipette: Put one end of the straw right into the alcohol and cover the other end firmly through your finger. This create a tiny vacuum that holds fluid in the straw. Lift her finger native the straw to release the fluid to gradually transfer fluid from one container to the other.

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