(1) Everything, living or non-living, is part of the ____________.

(2) ____________ organism do not exhibit any form of life.

(3) Cement is a ____________ matter

(4) Solid is very difficult to ____________.

(5) ____________ have no definite shape.

(1) Boiling point of ethanol is 100°C

(2) Solid changing to liquid is called fusion.

(4) In gaseous state, the interparticle spaces are very large.

(3) When a solid is heated, its atoms vibrate slowly about their fixed position.

(5) The zig-zag motion of gas particles is called spreading motion.

(1) What is matter?

(4) What is common in the three states of matter?

(2) What do you mean by density?

(3) Why do you smell a flower from distance?

(5) What is latent heat of vaporization?

(4) A gas exerts pressure on the walls of the container. Why?

(2) Write the difference between gas and vapour

(1) Write the characteristics of matter

(3) Write the two differences between boiling and evaporation.

(5) Does the evaporation of a liquid occur only at a fixed temperature?

(1) Write the four properties of gas

(2) Write the differences between solid, liquid and gas.

(3) Give reasons for the following observations: (a) Naphthalene balls dissappear with time without leaving any solid. (b) We can get the smell of perfume sitting several metres away

(4) Write the definitions of the following: (a) Sublimation (b) Boiling point (c) Condensation point (d) Vapour

Solid

evaporation

Juice

Increase in temperature of water

Juice

Solid

gas