By adding or removing energy in the form of heat, to either melt, boil, condense or freeze the matter.
Technically speaking, the switch of state of matter is the rearrangement of its molecules. Solids have tightly packed molecules that are close together. Liquids are relatively farther apart and take...
You change one state of matter to another by heating the matter or cooling it [aka] adding energy or removing the energy
phase change.
Yes. Disputes between states are heard in the US Supreme Court.