Galileo Thermometer

Price: £14.99

The Galileo Thermometer is a sealed glass cylinder with a range of glass balls suspended in the liquid inside.

Each of the glass balls is a different weight and as the liquid changes temperature it changes density and the suspended weights rise and fall to stay at the position where their density is equal to that of the surrounding liquid.

Each glass ball contains coloured liquid and a tag with the temperature marked on it, ranging from 18°C to 26°C.

What physics does this demonstrate?

The density of liquid changes according to the temperature.

This Galileo Thermometer is 28cm high, with a graduation of 2°C and a range of 18°C-26°C.