Diy Lava Lamp With Salt. Oil is lighter, or less dense, than water, so it rises to the surface. Screw the cap on the bottle and switch the utility light on at the base.
The benzyl alcohol, specific gravity 1.043 g/ml, and 4.8% salt water (brine, specific gravity 1.032 g/ml) go into the glass container. And then it blew up. Slowly fill the bottle with salt until the liquid level has reached the top.
This will illuminate the bubbles for an awesome visual treat.
Making a lava lamp is also a fun activity for parents and kids to do together. Use salt with a small grain; Basic diy lava lamp directions. Use a long lighting string with small lamps.