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General Chemistry Science Fair Project

Salt Volcano Lava Lamp

Salt Volcano Lava Lamp | Science Fair Projects | STEM Projects
Get ready for volcanic adventure! Create your very own lava lamp eruption using salt, oil, and water! See how density can cause an eruption that defies gravity!


The hypothesis is that pouring salt on top of oil in water will create an erupting salt volcano.

Method & Materials

You will pour water into a glass jar, add oil on top of it, and then sprinkle salt on the oil. As the salt dissolves, it will create an exciting eruption!
You will need a glass jar, vegetable oil, salt, water, and optional food coloring for an extra touch of color.


When salt is added to oil on top of water, it drags oil droplets down into the water. When the salt dissolves in the water, the oil rises back up in bursts, causing the lava eruption effect. This demonstrates the principles of density and immiscible liquids.

Why do this project?

This science project is interesting because it allows you to create a fascinating visual display using everyday materials. It also helps you understand the concepts of density and immiscibility in liquids.

Also Consider

Try using different types of oil and observe if there are any differences in the eruption. Add other substances, such as vinegar or baking soda, to see how they affect the volcano's eruption.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
Join the Fleet Science Center as they guide you through creating a salt volcano lava lamp and uncovering the fascinating science behind it!
Check out this effective way to make the lava lamp effect by pouring in the salt quickly in a circular motion!
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