Answer :

(a) Matter can be defined as anything that occupies space and has a volume. It possesses mass.

Examples - Air, Water, Soil and plastic.


(b) Characterstics of Particles of Matter


(i) Particles in matter are in a state of continuous motion-


The particles present in matter are not stationary, but have a tendency to acquire motion. In fact they are in a state of continuous motion.


(ii) Particles in matter attract one another-


The particles in matter attract one another. This attraction is inversely proportional to the distance between the particles.


(iii) Particles in matter have spaces between them -


Empty spaces called voids separate the particles from one another. Due to these voids matter is able to disperse into one another bringing about diffusion.


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