On the solid and liquid particles in clouds.

Nature and Sources of the Pollutant: Particulate matter is the term for solid or liquid particles found in the air.

An aerosol is defined as a suspension of solid or liquid particles in a gas.

In the atmosphere, this surface presents itself as tiny solid or liquid particles called CCNs.

Most of the liquid particles followed the course of the first, but a few went wild.

Whereas the nose would normally filter out many gases, solid or liquid particles can often can get around this natural protection.

Thus, the liquid particles change to gaseous particles (while still holding at 100degC).

So even liquid particles can "bounce" together but not coalesce.

It is due to the collisions between liquid particles and the grains.

The compressibility of liquids is very low since there is only little free space between liquid particles.