- solid is made up of particles which are very closely packed. Hence has a definite/fixed shape and fixed/definite volume /occupies definite space. It has a very high density.
- liquid is made up of particles which have some degree of freedom. It thus has no definite/fixed shape. It takes the shape of the container it is put. A liquid has fixed/definite volume/occupies definite space.
- gas is made up of particles free from each other. It thus has no definite/fixed shape. It takes the shape of the container it is put. It has no fixed/definite volume/occupies every space in a container.
In order to adjust the volume to the calibration, a dropper or a teat pipette can be used.