This easy salt lava lamp is a enjoyable twist on the extra conventional home made lava lamp that makes use of a fizzy pill. The salt lava lamp doesn’t look fairly a superb, and isn’t as reusable however remains to be a pleasant science exercise for studying about density.
A glass jar or glass
Vegetable oil – or different low cost cooking oil
Meals colouring -optional
Fill the glass or jar about three quarters full.
Prime up with vegetable oil to virtually the highest.
Sprinkle salt slowly for about 10 seconds excessive of the oil.
Sit again and watch!
Preserve including extra salt to maintain it going.
Why does a salt lava lamp work?
Oil floats on water as a result of it’s much less dense than water. Something much less dense than than water will float. We’ve demonstrated this earlier than with a fundamental density jar.
Oil and water are immiscible liquids, they don’t combine.
Once you pour salt onto the oil it sinks by way of the oil and into the water carrying a little bit oil with it.
The salt dissolves within the water which releases the oil permitting it to drift again as much as the oil layer.
Make a traditional lava lamp. These use oil, water and an effervescent vitamin pill.
One other enjoyable option to learn about density is to make a density column utilizing liquids with completely different densities.
Should you make your individual salt lava lamp, don’t overlook to ship me an image!
Final Up to date on September 12, 2022 by Emma Vanstone