Invisible Ink Experiment
Materials Needed:
- Cotton bud
- Lamp or light bulb
- Plain white paper
- Bowl or cup
Procedure:
- Prepare the Invisible Ink: Squeeze lemon juice into a bowl or cup and add a few drops of water.
- Write Your Secret Message: Dip the cotton bud into the lemon juice mixture and write your secret message on the white paper.
- Dry the Paper: Allow the paper to dry completely until the lemon juice becomes invisible.
- Reveal the Message: Hold the paper close to a light bulb. The heat will cause the invisible ink to appear.
The Science Behind It:
- Lemon juice contains carbon compounds that are colorless at room temperature.
- When heated, these compounds break down and release carbon.
- The carbon oxidizes upon contact with air, turning brown and revealing the message.
Want More Science Fun?
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