Matter In Our Surrounding Class 9 Notes-chapter 1

MATTERS

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{o}MATTER:- Anything things which occupies space is called matter.


( MATTER ARE MADE UP OF PARTCLES )

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{o}PARTICLES:- Chemicals combination of two or more atoms is called particles.


|-(1) Intermolecular force [I.M.F.]---the force that act b/w
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two molecules and help them to bind together.
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{ Characteristics of paricles}--------------------------(2)Intermolecular space
[I.M.S.]---the space b/w two
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molecules.
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|-(3)Kinetic energy---the energy which is poses by virtue

of motion(velocity) of an object.


[ PHYSICAL STATE OF
MATTER ]

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{o}SOLID:- The pysical satate of matter that hasfixed shape and fixed volume.
{o}LIQUID:- The physical state of matter that has fixed volume but not fixed shape.
{o}GAS:- The physiacl state of matter which has neither fixed shape nor foxed
volume.


(CHARACTERISTICS):- (SOLID) (LIQUID)
(GAS)

{i} I.M.F.----------------------------------------------
[high]--------------------------[low]----------------------[very low]
{ii}I.M.S.-------------------------------------------[very
low]----------------------[high]---------------------[very high]
{iii}K.E.---------------------------------------------[very
low]----------------------[high]---------------------[very high]
{iv}RIGIDITY--------------------------------------
[yes]---------------------------[no]-----------------------------[no]
{v}COMPRESSEBILITY-------------------[no]----------------------------
[yes]----------------------------[yes]
{vi}BOILING TEMP.-------------------------[high]--------------------------
[low]--------------------------[very low]
{vii}MELTING POINT----------------------[high]--------------------------
[low]--------------------------[very low]
{viii}DENSITY-------------------------------------
[high]--------------------------[low]--------------------------[very low]