A couple of weeks ago the children made thermometers out of jars and straws and they didn’t work at all. Rita very kindly sent some information on how to make a smaller one with better equipment. So this afternoon Ronan set about re-doing the thermometer experiment.
The glass tubes were a bit short so we had to half fill the test tube with coloured water but it did rise up the little inner tube a bit.
Ronan chose green food colouring for this time around.
Then I boiled some water.
Ronan held the thermometer in the boiled water for quite some time-and then we stirred my cup of tea with it too. LOL. Anyway, there wasn’t much of a result, but I think I saw a small shift in the water in the tube.
My guess is, it would work better with a longer tube, less water and perhaps if I had lit the little burner under it too. But with Miss Heleyna the Scary One around I didn’t dare.
Anyway, thank you Rita. It was fun and I am glad I invested in a little science kit.