ساينس الصف الأول الاعدادي – الفصل الدراسي الاول ساينس اولي اعدادي ترم اول In This part we will study : The molecule It is the smallest part of matter which can exist freely and it has the properties of matter . we will study: First : Molecules and their properties. Second : Molecules and physical change of matter. Third : Molecules and atoms. First : Molecules and their properties The properties of the molecules of matter are : 1- Molecules of matter are in a continuous motion. 2- There are intermolecular spaces among the molecules of matter. 3- There are attraction forces among the molecules of matter. Give Reason: 1- A drop of ink spreads through water. Because the molecules of ink are in a continuous motion 2- When you leave the perfume bottle open, you smell it all over the room. Because the molecules of the perfume are in a continuous motion intermolecular spaces They are the spaces that are found among the molecules of matter. Intermolecular force It is the force that binds the molecules of matter together. (G.R) It is difficult to break an iron piece with your fingers. Because there is a strong attraction force among iron molecules. لمتابعة مستر احمد الباشا وكل ما يخص الساينس : جروب الفيس بوك http://bit.ly/2Of1mcN صفحة الفيس بوك http://bit.ly/2Gq5xMo بالتوفيق مستر احمد الباشا