An actual single molecule is no different in a gaseous, liquid or solid state. However the thermal (kinetic) energy present in it varies between the states.
ones solid and ones liquid
Ice is a solid, water is a liquid, and oxygen is a gas in the air we breath.
The inner core is a solid, and the outer core is a liquid.
Filtration separates using a filter. Evaporation allows a liquid to evaporate, leaving a solid behind. The liquid is still present as a gas.
water is a liquid but wood isn't its a solid :D
more energy, for the most part heat, changes the state between solid and liquid.
Changing the liquid state to solid state is known as freezing, changing from solid state to liquid state is known as melting and changing from liquid or solid state to gaseous state is known as evaporation.
Liquids have a fixed volume but take the shape of their container, while solids have a fixed volume and shape. Liquids have higher molecular mobility compared to solids, allowing them to flow and take the shape of their container.
An Amorphous solid
A solid has a form, the gas is without form.
There is no actual name for a solid and liquid. An item can be a solid and liquid, but that is only under different pressures. For instance: The iron that makes up the Earths core is a solid, but that same material that is found in the Earths upper mantel is a liquid. This is because of the pressure differences
It is solid as it doesn't flow like a liquid or has vast space between its molecules like gases.