Can you make a lava lamp that glows without a black light? Glow-in-the-dark paint mixed into water creates a glowing liquid. Oil sits on top because it is less dense than water.
You charge the glow paint under a bright light. Then you add it to a bottle of oil and water. Dropping in a fizzing tablet sends glowing blobs up through the oil. Turn off the lights and the swirling blobs glow on their own.
This project combines density and gas reactions with the science of phosphorescence (materials that store and re-emit light).
Hypothesis
The hypothesis is that combining glow-in-the-dark gel, warm water, baby oil, and Alka-Seltzer tablets will create a bubbling glow effect in the lava lamp.
Dropping a fizzing tablet into a bottle of oil and glowing water releases carbon dioxide gas. The gas bubbles attach to droplets of the glowing liquid and push them up through the oil. Turn off the lights and swirling, glowing blobs rise and fall inside the bottle on their own.
Oil and water refuse to mix — they always stay in separate layers. When you pour baby oil into a jar of warm water, the two liquids stay apart even after you drop Alka-Seltzer tablets into the jar. The fizzing tablet sends glowing blobs of colored water up through the oil, but the layers never combine.
Glow-in-the-dark paint stores light energy and then releases it slowly as a visible glow — that slow release is phosphorescence. You charge the paint under a bright light, mix it with warm water, and add it to a bottle of baby oil. Dropping in a fizzing Alka-Seltzer tablet sends glowing blobs up through the oil. Turn off the lights and the swirling blobs glow on their own, the material still re-emitting the light it absorbed before the lamp went off.
Method & Materials
You will mix glow-in-the-dark gel with warm water, add glow-in-the-dark glitter, pour in baby oil, and then drop Alka-Seltzer tablets into the jar. Observe the bubbling and glowing reaction in the dark.
You will need a clear jar, glow-in-the-dark gel, warm water, baby oil, Alka-Seltzer tablets, and glow-in-the-dark glitter.
As the Alka-Seltzer tablets react with the water, colorful carbon dioxide bubbles rise through the oil layer. When the carbon dioxide escapes at the top, the colored water droplet sinks back to the bottom, creating a cycle of rising and sinking colored blobs. The glowing gel adds an extra touch of magic, making this lava lamp super fun to see in the dark!
Why do this project?
This science project is intriguing because it combines the magic of glow-in-the-dark materials, the separation between oil and water, and the exciting chemical reaction between Alka-Seltzer tablets and water. It's a unique way to explore scientific phenomena.
Also Consider
Try using different colors of glow-in-the-dark gel to create a multicolored lava lamp effect.
Add other small objects, such as beads or sequins, to see how they interact and move in the lava lamp.
Full project details
Additional information and source material for this project are available below.
