experiment with a handmade thermometer - J Arun Krishna

 

Hello! my name is J Arun Krishna. "Build a Thermometer Experiment".

 In order to conduct this experiment, I will require the following materials: a transparent glass bottle, a clear straw, some playdough, water and rubbing alcohol, red food colouring, bowls of hot and cold water, and a permanent marker. 

Let's begin by filling half of our glass bottle halfway with an equal mixture of rubbing alcohol and water. Then we'll add 10 drops of red food colouring to the mixture. Once we've wrapped the opening of the bottle with our playdough, 

we'll insert our straw into the bottle and seal it. The straw should not touch the bottom of the bottle, and it should protrude at least an inch above the surface of the playdough, according to the directions on the package. 

Check to see that the playdough completely seals the top of the bottle and is tightly wrapped around the straw before continuing. Okay! We're going to make a mark on the bottle to indicate how much liquid is currently in the straw. 

We're all set to put our thermometer to the test. Starting with a basin of boiling water, let's get this party started! Keep an eye out for when the liquid level in our straw begins to climb. Take a look at how far it has risen. 

I'm going to remove our bottle from the boiling water and set it aside to cool for a couple of minutes before using it. Now, let's see if we can get our thermometer to work in a bowl of icy water. What occurs after a couple of minutes is a mystery. 

As you can see, the liquid level in our straw is beginning to drop once more. The temperature inside the bottle is being measured by our analogue thermometer.

I hope you understand this experiment, If you want more experiment like this, keep following us.