MATTERMATTER IS MADE UP OF TINY PARTICLES

CALLED ATOM AND MOLECULS.

HOW DO MOLECULS FORM? SOLIDS,LIQUIDS AND GASES.

SOLIDEvery solid has unchanged shape and volume

SOLID

Those solid particles are closely packed and strongly tied by forces between them

SOLID

The molecules can only vibrate.

LIQUIDLiquid flows and

its shape is similar with the shape of its container

LIQUID

Though there are still forces between the molecules, they are not held in fixed positions

GASGas has no fixed

shape and volume.

GASGas particles are

free to move to any directions until they spread out evenly to fill the container.

GAS

The force between gas molecules very weak.

CONCLUSION