Chapter-1st

                                    Matter in our surroundings

# Matter:- it is defined as anything which have some mass and volume and occupies some space in the universe.

 ex:- pen, pencil, chair, etc.

# Characterstics of Matter:-

1.Particles of matter are small in size.

2.Particles of matter attract each other.

3.Particles of matter are continious in motion.

4.Particles of matter have space between them.

#States of Matter:-

1. solid state 

2. liquid state 

3.Gaseous state

~ Solid state:-

-they have fixed volume and fixed shape.

-They have very high intermolecular force of attraction.

-They are rigid.

-They are negligible compressible.

-They do not need container to store them.

-They have high density.

#Note;- it is defined as rate of mass per volume.

~Liquid State:-

-They have fixed volume but not fixed shape.

-They are compressible as compared to solid.

-They need container to store them.

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