Label 3 bottles or 3 jars 1, 2, and 3. If wanted, add the name of the liquid to the labels. Quinine water will glow in the dark when frozen.
*Note to parents: Use what you have on hand and what is available.
All good experiments begin with a question. When children guess what the answer might be, tell them they are predicting or hypothesizing a possible outcome.
Question: Do you think any of these liquids will glow when frozen? Which might glow? Why do you think so?
Experiment by using 3 different liquids such as 3 kinds of tonic water or use plain water and clear pop for two of them.
Observe: When frozen, place the ice cubes under a black light. Only a black light bulb is required, no fancy lamp. Let the children look and consider the results.
What is the conclusion? Were the children correct?
For fun: Place the ice cubes in the sink in some water, place the blacklight nearby, and let the children play while the ice melts. Just a very short time and spoons should be used, not hands.
Option: Use vocabulary cards with older children if wanted.
- Avoid looking directly at the ultraviolet “black light” and shining it on your skin because the light can damage your eyes and skin.
Thank you for reading, Carolyn