Why can we see clouds but not water vapour in the air?

Question

Why can we see clouds but not water vapour in the air?

Answer 1

Water vapour is an invisible gas.Clouds contain water droplets(which is in liquid form)which are formed by the condenstion (a process in which  change of state of matter occurs from gaseous  form to liquid form) of the water vapour into tiny water droplets.Further this condensation occurs on what is known as condensation nuclei which are dust particles and smoke particles already available in the atmosphere.So cloud contains liquid water droplets formed over solid dust particle.So,it is visible.

Answer 2

Water vapour is gas and invisible. Clouds are water droplets which are liquid. The sun reflects off the water droplets and that's why they're white.

Answer 3

Clouds are much more dense than water vapor.  A cloud contains water vapor clinging to small dust particles in the air that allow the droplets to stay suspended.  The closed you can see to either close up would be fog, which is a ground level cloud.