On June 1st, Mom looked at the thermometer and all the globes were sitting at the bottom. Audrey demonstrates:
The "hottest" globe is labeled 80 degrees, so it was over 80 degrees Fahrenheit inside our house. And that was WITH the air conditioning running. The weather was hot and muggy outside.
Today, the thermometer looks like this (without any air conditioning on):
That orange globe is labeled 72, so it is about 72. In fact, the orange globe was tending to sink more, so it is probably 73-74.
According to what we looked up, the fluid in the tube is not water, but something like ethanol (alcohol) whose density changes more with temperature than water's does.
Mom was surprised because, although she has had the thermometer for a while, she had not realized it cannot "measure" above 80 degrees F. She hasn't paid a lot of attention to what temperature it was telling us. She just liked to look at it!
We bet Punapippuri's and Tonks Tails' humans can tell us a lot about things like this!! They are Physics experts.