Class 9 Science: Chapter 1 - Matter in Our Surroundings
1. Introduction to Matter
Definition: Matter is anything that occupies space and has mass.
Examples: Air, water, rocks, humans.
2. States of Matter
1. Solid
Properties: Fixed shape, fixed volume, incompressible.
Examples: Ice, rock, wood.
Acronym: "FSFVIC" - Fixed Shape, Fixed Volume, Incompressible
2. Liquid
Properties: No fixed shape (takes the shape of the container), fixed volume, slightly compressible.
Examples: Water, oil, alcohol.
Acronym: "NFTVSC" - No Fixed Shape, Fixed Volume, Slightly Compressible
3. Gas
Properties: No fixed shape, no fixed volume, highly compressible.
Examples: Air, oxygen, carbon dioxide.
Acronym: "NFNHHC" - No Fixed Shape, No Fixed Volume, Highly Compressible
3. Characteristics of Particles of Matter
Particles are very small: They are too tiny to be seen with the naked eye.
Space between particles: Determines the state of the matter.
Particles are in constant motion: Higher temperature increases the motion.
1. Introduction to Matter
Definition: Matter is anything that occupies space and has mass.
Examples: Air, water, rocks, humans.
2. States of Matter
1. Solid
Properties: Fixed shape, fixed volume, incompressible.
Examples: Ice, rock, wood.
Acronym: "FSFVIC" - Fixed Shape, Fixed Volume, Incompressible
2. Liquid
Properties: No fixed shape (takes the shape of the container), fixed volume, slightly compressible.
Examples: Water, oil, alcohol.
Acronym: "NFTVSC" - No Fixed Shape, Fixed Volume, Slightly Compressible
3. Gas
Properties: No fixed shape, no fixed volume, highly compressible.
Examples: Air, oxygen, carbon dioxide.
Acronym: "NFNHHC" - No Fixed Shape, No Fixed Volume, Highly Compressible
3. Characteristics of Particles of Matter
Particles are very small: They are too tiny to be seen with the naked eye.
Space between particles: Determines the state of the matter.
Particles are in constant motion: Higher temperature increases the motion.
