Dhalaalid: heerkulka dhalaalidda iyo heerkulka qaboobidda

When it melts, a substance changes from the solid state to the liquid state. When it freezes, a substance changes from the liquid state to the solid state. At temperatures below its melting point, a substance is in its solid state. At temperatures above its freezing point, a substance is in its liquid state. The melting point and freezing point of a pure substance are the same temperature.