Question

What happens to the particles of the liquid inside a thermometer when the thermometer is heated?

They slow down and spread apart.

They speed up and spread apart.

They slow down and move closer together.

They speed up and move closer together.

Answer 1

The particles of the liquid inside a thermometer speed up and spread apart when the thermometer is heated. In short, the particles expand from one another when they're heated, and become condensed and compact when chilled.

Answer 2

Speed up and spread apart