The Three Physical States

BUCUN BENGKEL :

Solid

A solid is any physical substance which keeps its shape even when not contained. It can consist of billions of molecules, all exactly the same size, mass, and shape. The molecules are strongly attracted to each other. Considerable force is necessary to separate them. A solid must always be supported by an upward force or it will fall.

Liquid

A liquid is any physical substance which will freely take on the shape of its container. However, its molecules strongly attract each other. The higher the temperature, the faster the molecules move. Water molecules move upward to downward the top of the container. This is because they require more space for their rapid movement.

Gas

A gas is a physical substance which must be enclosed in a sealed container to prevent its escape into the atmosphere. The molecules, having little or no attraction for each other, travel in a straight line. They bounce off each other, off molecules of other substance, or off the container walls. They have little or no attraction for any substance.

Source : Panasonic