Make your own thermometer with this neat science project you can do at home.

What You’ll Need

  • empty glass bottle
  • food coloring
  • modeling clay
  • clear straw
  • 1/2 cup of rubbing alcohol
  • 1/2 cup of water

How to Make a Bottle Thermometer

  1. Pour your water into the glass bottle.
  2. Pour your rubbing alcohol into the bottle.
  3. Add a few drops of food coloring. Mix by swirling the bottle around, gently.
  4. Insert your straw into the bottle. Make sure it doesn’t fall in or touch the bottom.
  5. Secure the straw with modeling clay at the top of the bottle. Make sure not to cover the top of the straw.
  6. Place your thermometer in the sun to see it in action and watch the video above to hear Mya, the Full-Time Kid, explain how it works!

About Danielle Steinberg

Danielle Steinberg

Danielle received her Masters in Education which led her to a spot on the PBS Parents team in 2011. She now works full time as a producer of content and social media for PBS Digital Studios and continues to work as a web producer for PBS Parents.

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