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 diver is able to cut through water in a swimming pool. Which property of matter does this observation show?

The mass per unit volume of a substance is called density. (Density = Mass/Volume ). Arrange the following in order of increasing density – air, exhaust from the chimneys, honey, water, chalk, cotton and iron.

(a) Tabulate the differences in the characteristics of states of matter.

(b) Comment upon the following:

rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.