ساينس الصف الرابع الإبتدئي – الفصل الدراسي الاول In This part we will study : 1 – Changing of water from solid state to liquid state: Melting: It is the change of matter from the solid state to the liquid state by heating. 2 – Changing of water from liquid state to gaseous state: Evaporation: It is the change of matter from the liquid state to the gaseous state by heating. 3– Changing of water from gaseous state to liquid state Condensation: It is the change of matter from the gaseous state to the liquid state by cooling. 4– Changing of water from liquid state to solid state Freezing: it is the change of matter from liquid state to solid state by cooling بالتوفيق مستر احمد الباشا