How to make an atmospheric thermometer with children

How to make an atmospheric thermometer with children

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You don't have to have a lab to do great science experiments with your kids. We show you how to make a homemade atmospheric thermometer, with recycled material and without risks.

This experiment brings science to children in a fun way. You only need a bottle, food coloring, a straw and water. Are you ready?

  • 50 ml empty bottle
  • Transparent straw
  • Clay
  • Water to fill the bottle
  • Pair of scissors
  • Bowl with hot water
  • Food coloring
  • Alcohol and ice if you want to calibrate (optional)

1. Make a hole with the scissors in the stopper of the bottle.

2. Now put the straw through the hole you made.

3. To prevent a leak, put some playdough on the lid, surrounding the straw.

4. Fill half the bottle with water and add a few drops of food coloring so that the effect of the experiment can be clearly seen later. Thus, when the water rises through the transparent straw, it will be much easier to see.

5. Close the bottle. The straw has to go as far as the water begins. Make sure it arrives safely.

6. As the bottle heats up, the molecules stir faster and push the liquid up through the straw. To check it, you have to heat water in a bowl and put the bottle. Magic! Hot water rises through the straw! And this is how a thermometer works.

7. Calibrating the thermometer requires a bit of skill. To do this, you have to add a little alcohol to your mix. To find out where to mark 90 degrees, boil water and hold your bottle for 5-10 minutes. Mark where the water hits. To find out where 0 degrees are, now you must put the bottle in a bowl with ice for another 10 minutes. Mark where the liquid arrives. This is the scale that tells you where the 0 and 90 degrees are. Half will be 45 degrees. And if not, even easier: help yourself with another atmospheric or kitchen thermometer.

Video: Fall Activity For Kindergarten - Changing Temperature Experiment With Thermometer For Kids (August 2022).