Class 9 th
Chapter 1st Matter in our sorroundings
Full revision with Diagram &
Few Questions.
matter
DeFinition :- Any object have mass and which
occupies space is called matter.
or
It is anything that occupies space and has mass and
offers resistance to any applied force.
,matter is maDe oF partiCles
Matter is made up of very tiny particles.
CharaCteristiCs oF partiCles:
(i) Particles of matter are continuously moving.
(ii) Particles of matter have space between
(iii) Particles of matter attract each other
states oF matter
The physical states of a matter are:
(I) Solid
(II) Liquid
(III) Gas
(i)soliD state
, Characteristics of solid states
1. Have definite shape.
2. Have distinct boundaries.
3. Have rigidity and incompressibility.
4. Have definite volume.
Some Exceptional
Examples:
• Rubber is a solid but it can change its shape
under force and regains its shape when force is
removed.
• We can compress sponge as its pores are filled
with air but it is solid.
• Salt and sugar take the shape of the container in
which they are placed but shape of their crystals
do not change, so they are solids.
Chapter 1st Matter in our sorroundings
Full revision with Diagram &
Few Questions.
matter
DeFinition :- Any object have mass and which
occupies space is called matter.
or
It is anything that occupies space and has mass and
offers resistance to any applied force.
,matter is maDe oF partiCles
Matter is made up of very tiny particles.
CharaCteristiCs oF partiCles:
(i) Particles of matter are continuously moving.
(ii) Particles of matter have space between
(iii) Particles of matter attract each other
states oF matter
The physical states of a matter are:
(I) Solid
(II) Liquid
(III) Gas
(i)soliD state
, Characteristics of solid states
1. Have definite shape.
2. Have distinct boundaries.
3. Have rigidity and incompressibility.
4. Have definite volume.
Some Exceptional
Examples:
• Rubber is a solid but it can change its shape
under force and regains its shape when force is
removed.
• We can compress sponge as its pores are filled
with air but it is solid.
• Salt and sugar take the shape of the container in
which they are placed but shape of their crystals
do not change, so they are solids.
