Prepare the Thermometric Liquid
1:30
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What happens here
Pour approximately one cup of rubbing alcohol into the clear plastic bottle. Then, add a few drops of blue food coloring to the alcohol and mix it thoroughly by shaking the bottle. This step prepares the thermometric liquid, making it visible for observation within the straw.
Goal: Create a visible liquid that responds to temperature changes.
Tools and materials
- Clear Plastic Bottle — To contain the liquid
- Food Coloring — To color the liquid for visibility
- Rubbing Alcohol — The thermometric fluid