Give reasons for the following observation:

The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close.

A particle requires kinetic energy for its movement and the kinetic energy of the particles increases with increase in temperature. As gases have more kinetic energy than solid and liquid particles, so they move with more speed with the increase of temperature.

That's why, the smell of hot sizzling food reaches us even if we are several meters away while to get the smell from cold food which has less kinetic energy due to less temperature we have to go close.