Question

‘We can easily move our hand in air but not through any solid material.’’ Justify the statement by giving any three possible reasons.

Answer 1

reasons:
solids are very tightly packed whereas gases are very loosely packed
solids have high rigidity whereas gases have no rigidity

Answer 2

Air is a gas, it has more space in between particles. But solid block of wood is rigid, hence it is difficult to move our hands through it.