What does a molecule have to do with liquid?

Answer 1

All liquids are made up of tiny things called molecules. Liquids can have molecules made of a single atom, like Mercury, or a combination of a few atoms like water (H2O) or ethanol (CH3CH2OH), or larger molecules like gasoline. Most liquids are mixtures of a lot of different molecules, like a bloody mary, or urine. Liquids can freeze into solids or evaporate into gases, in which case the molecules become either linked more tightly together or escape into the air as isolated single molecules, respectively.

Answer 2

In a liquid, molecules are relatively close together but still have the freedom to move past one another. The intermolecular forces between molecules are strong enough to keep them together but not rigidly fixed in place like in a solid. These properties allow liquids to flow and take the shape of their container.