Summer Science: Fireworks in a Glass

Fireworks in a glass is an easy to do experiment that demonstrates density
Published: Jul. 5, 2023 at 10:17 AM EDT|Updated: Jul. 5, 2023 at 3:35 PM EDT
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EFFINGHAM COUNTY, Ga. (WTOC) - In this Summer Science experiment Kayla and Mackenzie from Effingham College and Career Academy walk us through how to make ‘Fireworks in a Glass.’

This experiment is a demonstration of density, which is the measurement of how tightly a material is packed together.


- Liquid Food Coloring

- Warm Water

- Vegetable Oil

- A clear glass or jar


- Fill ¾ of the jar or glass with warm water


- Add about half an inch of oil and let it settle


- Drop food coloring in and wait for the magic to happen!


- Oil has a lower density than water because its molecules are bigger and therefore can’t pack as tightly together. Because of this, the oil floats on water.

- The food coloring forms drops in the oil because most food coloring is water based. Because the food coloring is denser than the oil, it will drop down from the oil into the water creating the ‘firework’ effect.