Selina Concise ICSE Solutions for Class 8 Physics Chapter 1 Matter • Matter Every substance living and non-living that we see is made up of matter and MATTER “is something which has mass, occupies space and can be perceived by our senses.” e.g. Hydrogen, milk, oxygen, pen, table, water, iron, air, oil, sugar etc. • Matter is composed of tiny particles called molecules, which are in constant motion, have spaces between them and have inter-molecular attraction. • Every molecule can exist freely in nature and has all the properties of matter. • A molecule is composed of ATOMS, but atom cannot exist free in nature. • INTER-MOLECULAR FORCE ‘The molecules of a matter exert a force of attraction on each other – The force of attraction is called INTER- • MOLECULAR FORCE This force in solid is very strong and we cannot break a solid easily. In liquids this force is less strong and in molecules of gas it is very less. – • FORCE O...
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