Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out Why?

Give reasons : (a) A gas fills completely the vessel in which it is kept. (b) A gas exerts pressure on the walls of the container. (c) A wooden table should be called a solid. (d) We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert.

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.

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 chaimnays, honey, water, chalk, cotton and iron.

What are the characteristics of the particles of matter?

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