Changes of State

A gas turns to a liquid

A student leaves a chocolate bar in their pocket at school

A solid becomes a gas

A puddle of water gets smaller in the sun

A student makes mango ice cream from a mango smoothie

The particles gain energy and the chemical bonds weaken. The particles now have a random arrangement and move around each other

The particles lose energy, and slow down. The chemical bonds reform and the particles arrange themselves in a rigid, ordered manner