The states of Matter.

-Generally substances can exist in three states of matter-Solid,liquid and gases.

SOLIDS
-Fixed shape and volume.
-High density.
-Incompressible.
-Hard and rigid.

LIQUIDS
-Fixed volume but doesn't have a fixed shape.
-High density.
-Incompressible.

GAS
-No fixed shape or volume.
-Low density.
-Compressible.

*The above are the properties.To understand why they have diff properties we have to understand the nature of matter in a microscopic level.

THE KINETIC MODEL OF MATTER.
-As we all know,at a microscopic level all matter is made up of atoms and molecules (we've learned this in chem!!).And the atoms and molecules are always in a continuous motion.The assumption of the particles in a continuous motion is known as the kinetic model of matter! (:


-The particles in solids are arranged as closely packed.This results in solids having high densities as,when it is closely packed it has a greater mass hence solids have high density.(mass/volume)

-Also solids have fixed volume and shape as the particles in the solid only vibrate about its position.Also it is held be strong intermolecular bonds.


-Liquids also have high densities because the particles are also arranged closely together.

-The particles in a liquid is free to move but within the vessel thats containing it,that's why liquids have fixed volume but not a fixed shape as it takes the shape of the vessel containing it.


-Gases have low densities as the particles are far apart and also its randomnly arranged.The same logic is applied as for the solids,gases have fewer molecules hence density is low.

-Gases have no fixed volume nor shape because particles have very lil attraction between them and move at high speeds.


BROWNIAN MOTION
-Random or irregular motion of smoke particles in air.
-Occurs only in LIQUIDS.
-At higher temperatures the smoke particles will become more agitated and vigorous.Meaning the air particles have greater speeds at higher temperatures.


And i am done for this chapter.I hope you guys understand it.I don't think this chapter is much of a problem as we have done this in chemistry except for the BROWNIAN MOTION.(I like the word Brownian motion.It has the word BROWN..CHRIS BROWN!!!!haha)(: