Oil Bubbles in water Science Experiment
Channel: Kids Fun Science
Date: 2021-03-16

Oil Bubbles in water Science Experiment
Made for parents and teachers

Science Kits and more
https://elementarysciencen.wixsite.com/sciencekits

Kids Fun Science Online Store 
https://teespring.com/stores/kids-fun-science

My Filming equipment:
Cell Phone Tripod 54 inch Travel Tripod with Bluetooth Remote - https://amzn.to/34REzbB 
Blue Yeti USB Microphone - https://amzn.to/3ePJwGu 
Green screen & lights - https://amzn.to/2XT9Yc1 
Apple iMac 21.5in 2.7GHz Core i5 8GB memory - https://amzn.to/34ZMIe7
iPhone 8 - https://amzn.to/3byn4zw
iMovie for editing

UK Amazon 
My Filming equipment:
Cell Phone Tripod 54 inch Remote - https://amzn.to/309GCGk
Blue Yeti USB Microphone - https://amzn.to/3sJQdje
Green screen & lights - https://amzn.to/38aOP1o
Apple iMac 21.5in 2.7GHz Core i5 8GB memory -  https://amzn.to/3kQwITt
iPhone 12 Pro - https://amzn.to/2Oto9Cc
iMovie for editing

Set up
1) Fill a large jar about 3/4 full of water
2) Then add a cup of vegetable oil to the jar. Wait a couple seconds for the oil to separate from the water.
3) Optional add food coloring to the water.

The experiment
1) Add a tablespoon of salt to the jar.
2) Watch the Bubbles form at the bottom and float back to the top.
3) Add more salt and watch the oil bubbles

This is a fun & easy science experiment, kids can explore density and a little bit of chemistry as they make oil bubbles with just a few common household items.

Oil & water don’t mix because of their densities and the chemistry of oil and water molecules.  Oil is LESS dense than water. Oil are made of non-polar molecules. Water is made of polar molecules that can interact with other polar molecules. Because oil & water are made of unlike molecules, they cannot interact with each other and stay separate. Even though oil and water are both liquids, they are what chemists call immiscible liquids. Which means they don't mix.

Salt is heavier than water, so when I added salt on top of the oil, it sinks to the bottom of the mixture, carrying some of the oil with it. In the water, the salt starts to dissolve. As it dissolves, the salt releases the oil, which floats back up to the top of the water. After the salt dissolves, you can add more salt and it will create more oil bubbles. 

Try these other experiments with your Oil Bubbles
Try spreading the salt in a thin layer on top of the oil 
Then pour it in one blob. Does that make it have bigger or smaller oil bubbles?
Try this experiment again using two jars, one warm water & one cold water. How does the different temperature waters affect the rate at which salt dissolves (which jar does the oil bubbles rise the fastest)?