ساينس الصف الخامس الإبتدئي الفصل الدراسي الاول ساينس خامسة ابتدائي – ترم أول In This part we will study : How was the magnet discovered??? 2000 years ago, the ancient Greeks found type of black rocks located in an area named ‘Magnesia” This type of rocks has an attractive force to any material make of iron. So, Scientists called this black rock (( natural magnet)) and its attractive force ((Magnetism)) Types of the magnet: Types of magnet are: 1- natural magnet. 2-Artificial (man-made) magnet. Give reason 1. The magnet attracts iron nails, but does not attract chalk pieces . Because iron nails are magnetic materials, while chalk pieces are non-magnetic materials. 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