Salt Volcano Experiment

Step 1

Fill your clear glass jar or cup about 3/4 full with room temperature water.

Step 2

Gently pour vegetable oil into the jar until there's about 1/2 inch floating on top. Let it settle.

Step 3

Add a few drops of food coloring to the oil layer for a colorful display (optional).

Step 4

Slowly sprinkle salt into the jar. Watch it carry oil downward and create bubbling eruptions as it sinks and dissolves.

Step 5

Keep adding salt to see ongoing bubbling. Observe the interaction between salt, oil, and water.