For gas and liquid, it took shape of what ever contain them.
For solid, it took original shape of what ever contain them before freezing to solid or mold them to solid. The later shape of solid is due to what it suffer over time to shape it to existing shape.
the volume of them all stay the same
neither the shape nor the volume
No, not all solids necessarily have less volume than the same mass of liquid. The relationship between volume and mass depends on the density of the substance. Some solids may be more dense than liquids, resulting in a smaller volume for the same mass.
not nessaserily a 1x8x8 rectangle has the same volume as a 4x4x4 cube
Yes, all solids have a volume.
Their volume increases - that is to say, the solids expand. However, their mass stays the same.
There are infinitely many solids and so infinitely many formulae. The question cannot be answered.
Solids are usually more dense because solids have a smaller volume than liquids or gases, so the same amount of mass is in a smaller volume, making the density greater.
Solids have a definite volume and gases have a variable volume
they all contract.
Liquids, like solids have a definite volume. While liquids don't have a definite shape, they can take the shape of a container which can be measured the same way as with solids.
They don't. Some liquids expand when they become solid and others shrink, while some do maintain the same volume.