What actually are fog and mist?

Question

I understand that fog is denser mist, and that essentially, it’s all just water vapour. But so are clouds. So why is water vapour sometimes at ground level? Why is it only sometimes? Why is it usually albeit not always at night? What makes it happen? And what makes it NOT happen?

In: 4

Answer 1

Fog and mist are tiny droplets of (usually) water suspended in the air. There are enough of them and they’re packed closely enough together that you can see them.