# Why can gases be compressed more easily than solids?

This is possibly beyond your level of study (it is beyond mine now!), but physicists speak of the mean free path of gaseous molecules. For a reasonably high vacuum the $\text{mean free path}$ of a gaseous particle before collision with another particle is on the order of $\text{millimetres}$ to $\text{metres}$.......Compression is thus facile.