Tremendous Salt Lava Lamp

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.

You’ll want

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.

salt volcano made with water, oil and salt

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.

Extra concepts

Make a traditional lava lamp. These use oil, water and an effervescent vitamin pill.

lava lamp made with blue coloured water, oil and an effervescent vitamin tablet

One other enjoyable option to learn about density is to make a density column utilizing liquids with completely different densities.

Image of a density column made with honey, golden syrup, washing up liquid, coloured water and oil

Should you make your individual salt lava lamp, don’t overlook to ship me an image!

Salt lava lamp for a science experiment next to a real lava lamp

Science ideas


Immiscible liquids

Final Up to date on September 12, 2022 by Emma Vanstone

Our names are Fareedah and Kamilah Amoo. We are seven and five year’s old sisters and live in Ontario, Canada, with our parents and little brother, Awad. We love writing stories, painting on canva, coding, reading books, and enjoying arts and crafts. Our goal is to motivate every child worldwide to read more books.

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