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Keepin' Cool! - How do thermometers work? (Experiment) |
by Mya Kagan (whyzz writer) >> more about the author
It's easy to see for yourself the way the liquid inside of a traditional thermometer rises from warmth and gets lower as it cool down.
Take a liquid thermometer and leave it sitting out on a table for a few minutes. The temperature it shows will be the same as the temperature in the room.
Pour a glass of ice water, and stick the tip of the thermometer into the water. Watch the way the liquid quickly shrinks down as it picks up on this new change in temperature!
Now, stick the end of the thermometer into a glass of warm water, and watch what happens! The red liquid inside will quickly shoot back up, showing you that it's now detecting a warmer temperature! Cool!!
Take a liquid thermometer and leave it sitting out on a table for a few minutes. The temperature it shows will be the same as the temperature in the room.
Pour a glass of ice water, and stick the tip of the thermometer into the water. Watch the way the liquid quickly shrinks down as it picks up on this new change in temperature!
Now, stick the end of the thermometer into a glass of warm water, and watch what happens! The red liquid inside will quickly shoot back up, showing you that it's now detecting a warmer temperature! Cool!!