States of Matter

Class 9 States of Matter Notes

Text Book	NCERT
Class	Class 9
Subject	Science
Topic	States of Matter
Chapter Name	Matter in Our Surroundings
Category	Class 9 Science

Related Questions

Question 1 Name three states of matter?

Question 2 Differentiate between three states of matter ?

Question 3 Give full form of LPG and CNG ?

Question 4 Why do gases exert more pressure than liquids ?

Question 5 Why gases are highly compressible ?

Question 6 Why liquids do not have fixed shape but fixed volume ?

Question 7 Why water is a liquid and iron rod is a solid ?

States of Matter

Matter can be classified into 3 states:

(1) Solid

(2) Liquid

(3) Gases

Solid	Liquid	Gases
(1) They have fixed shape and volume	They do not have fixed shape but have fixed volume	They do not have fixed shape and volume
(2) They cannot be compressed	They cannot be compressed	They can be compressed easily
(3) They have high density	They have moderate density	They have low density
(4) They do not flow	They flow easily	They flow easily
(5) They do not fill their container	They do not fill their container	They fill their container
(6) The forces of attraction are strong	The forces of attraction are less strong than solids	The forces of attraction are weak.
(7) Kinetic energy is least	Kinetic energy is more than solids	Kinetic energy is maximum.
(8) Particles are closely packed	Particles are not close as in solids	Particles are much farther apart from one another.
(9) For Ex: Chair, table, chalk, book	For Ex: Water, petrol, cold drinks	For Ex: Oxygen, nitrogen, helium

Aquatic animals can breathe under water due to the presence of dissolved oxygen in water.

LPG – Liquified Petroleum Gas

CNG – Compressed Natural Gas

Gases have high compressibility. They can be compressed into very small volumes by applying large pressure. Due to its high compressibility, fairly large mass of gas can be put in a small metal cylinder by compression. Such gas cylinders can be easily transported from one place to another.

 

Other Topics in this Chapter Matter States of Matter Sublimation Characteristics of particle nature of matter Change in state of matter Diffusion Evaporation Evidences of particle in matter and their motion Latent Heat Water vapours in air