Matter

Matter

Anything that occupies space and has mass.

Particulate Nature of Matter

All matter is made up of atoms, which move in an empty space called void.

Solids

have definite shape and volume

Solids

tightly packed together

Solids

almost incompressible

Solids

particles vibrate in a fixed position

Solids

high densities and can expand only slightly when heated.

Liquids

no definite shape but have definite volume

Liquids

particles are in contact with each other

Liquids

have enough energy to keep changing positions relative to one another

Liquids

forces between particles are strong enough to keep them close together but not strong enough to prevent them from moving apart from each other

Liquids

generally have medium densities

Gas

takes shape, no definite volume

Gas

can expand to fill any volume

Gas

particles have enough energy to move freely

Gas

particles collide randomly