Luke wanted to do an extra credit project for school, so we jumped in and hoped for the best!! The project was to make a thermometer out of some around-the-house materials. Here's how it happened ....
It started by adding some food coloring to a bottle of cold water.
Next came putting some play-do around a straw without squishing the straw
Next he filled the bottle with water and put the straw in with sealing the top with the play-do. Notice the water begins to come up the straw.
Luke then started cutting a scale out of cardboard.
When we tried to attach the scale to the straw, the seal of play-do was broken so it's accuracy was well, not as accurate!
Overall though, when the air temperature is warmer than the water, the water goes up the straw. When the air is cooler, the water goes back down.
And Landry decided to have a little fun with the extra play-do ....