How evaporation differs from boiling?

Give Reasons for the Following:

Why does a desert cooler cool better on a hot dry day?

Differentiate between solids, liquids and gases with respect to : (a) fluidity (b) kinetic energy (c) density (d) shape (e) rigidity (f) compressibility.

Differentiate between gas and vapour.

What are the characteristics of the particles of matter?