Explain why we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.

Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy, and density. Also, please compare these properties with solids, liquids and gases.

 Define latent heat of fusion

how can show that particles matter have spaces between them?

1. Why is ice at 273 K more effective in cooling than water at the same temperature?
2. What produces more severe burns, boiling water or steam?

Explain why:

(a)air is used to make inflate tyres.

(b)steel is used to make railway lines.

why does the temperature of a substance remain constant during its melting point or boiling point ?

activity to show that gases are highly compressible than solids and liquids ?

examples of application of evaporation used in our daily life

do an activity to show that particles of matter are very small beyond our imagination

why do trees acquire more leaves during summer?

1. Why should curd and sour substances not be kept in brass and copper
vessels?

1. Is matter continuous or particulate in nature?

give reason water at room temperature is a liquid

Explain the interconversion of 3 states of matter in terms of force of attraction and kinetic energy of molecules.