UNIT SEVEN: Kinetic Model Of Matter

SEVEN.ONE: The States Of Matter

There are 3 types of matter which are mainly solid, liquid and gas.
There is actually one more, the fourth, which is none other than plasma.
However we won't be touching the properties of this matter in this chapter.
Eg of 3 states of matter
-Water exists is 3 states: ice(solid), water(liquid) and water vapour(gas).

The 3 states change according to it's surrounding temperature and atmospheric pressure.

The table below shoes the properties of the individual matter.

State of matter	Properties
Solid	Fixed shape and volume Normally hard and rigid, large force needed to change its shape High density Incompressible
Liquid	Fixed volume but does not have a fixed shape High density Incompressible
Gas	No fixed shape or volume Low density Compressible

Why does the properties of a substance vary depending on the state it's in?

The Kinetic Model Of Matter
-at microscopic level, all matter is made up of tiny particles called atoms or molecules(atoms joint together).
-these particles are always in continuous motion

The table below is the exlaination of the properties of matter using the kinetic model of matter

State of Matter	Movement of particles
SOLID	Vibrate about fixed position only. Held in position by very strong intermolecular bonds. Resulting in fixed volume and shapes
LIQUID	Free to move about but confined within the vessel containing it Resulting in fixed volumes but will take shape of the vessel containing it
GAS	Particles have little attraction between them. Move about freely and at very high speeds. Resulting in no fixed volume and highly compressible

Here are some videos on the molecules in solid and liquid.