Chapter : 1. Matter In Our Surrounding
Classification of matter
Classification of matter
On the basis of physical states, all the matter can be classified into three groups.
1. Solids 2. liquids 3. Gases
Properties of solids
Solids have a fixed shape and a fixed volume
Solids cannot be compressed much.
Solids have high densities. They are heavy
Solids do not fill their container completely.
Solids do not flow.
Ex. Ice, wood, coal, stone, iron, brick
Properties of liquid
Liquids have a fixed volume but they have no fixed shape. Liquids take the shape of the vessel in which they are placed.
Like solids, liquids cannot be compressed much.
Liquids have moderate to high densities. They are usually less dense than solids.
Liquids do not fill their container completely.
Liquids generally flow easily.
Ex. Water, milk, fruit juice, ink, groundnut oil, kerosene etc.
Properties of gases
(1) Gases have neither a fixed shape nor a fixed volume. Gases acquire the shape and volume of the vessel in which they are kept.
(2) Gases can be compressed easily.
(3) Gases have very low densities. They are very. very light.
(4) Gases fill their container completely.
(5) Gases flow easily.
Ex. Air, oxygen, hydrogen, nitrogen
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