ساينس الصف الرابع الإبتدئي – الفصل الدراسي الاول In This part we will study : Matter exists in three states: Solid state 2. Liquid state 3. Gaseous state. Solid state Solids have definite shapes and volumes. Solid materials are rigid (hard). 2. Liquid state Liquids have definite volumes and indefinite shapes (they take the shapes of their containers) . 3. Gaseous state Gases have indefinite shapes and volumes (they take the shapes and the volumes of their containers). بالتوفيق مستر احمد الباشا