Do they hold their shape?
Not exactly. Most if not all are free to flex, bend, vibrate as much as they please and yet would be undeniably solid. For some (metals), deformation is also possible under large stresses without fluid or gaseous properties being exhibited.
Solids DO, however, resist change to their shape, and some will return elastically to their previous shape.
A solid has a definite shape and volume. (but the volume may change with temperature)A liquid has a definite volume but not a definite shape, and a gas has no definite volume or shape.
A solid is another state of liquid. Usually, water is frozen into a solid (ice).
It has a definite volume but no definite shape it change based on the container it's in.
Your question is very muddled but I think the answer you are after is 'density'.
That is a very vague question with tons of possible answers, but here goes. 1) They are both composed of atoms. (obviously) 2) Neither has the ability to fill the container regardless of the amount placed, unlike a gas, which fills its container regardless of total mass. 3) Both usually cause sound to pass through faster than in natural air. And on and on we go... Specify a little bit and I'll be able to help further if this isn't what you're looking for.
A solid has a definite shape and volume. (but the volume may change with temperature)A liquid has a definite volume but not a definite shape, and a gas has no definite volume or shape.
A solid is another state of liquid. Usually, water is frozen into a solid (ice).
Because its particles are free to move, a liquid has no definite shape. However, it does have a definite volume.
They dont
It has a definite volume but no definite shape it change based on the container it's in.
The particles of a liquid move from one place to another although they are close together. Because of this, a liquid changes shape depending on the container they are put in. It does not have a fixed shape. The volume of a liquid is fixed; it can be measured.
because it nothing
yes, you can. It depends on the exact shape. You can use the volume of a cylinder for example if it is one. So we need more info to help provide a better answer.
Science tools help us by using them to observe, handle solids or liquids,and measure solids and liquids.
Your question is very muddled but I think the answer you are after is 'density'.
All I know is that we drink liquids, breath gases, but how does solids help?
they expand! does that help