شرح ساينس الصف الخامس الابتدائي لغات - الفصل الدراسي الثاني
شرح ساينس خامسة ابتدائي - ترم ثاني

لينك تحميل الملزمة
https://drive.google.com/file/d/1BU6ag2JYII9m1bPg2To15Dewx5L-uR_o/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Lesson:
► Our solar system consists of the Sun and a group of planets revolve around it.
► In 1543, a scientist called Nicolaus Copernicus stated that Earth revolves around the Sun.
► In the solar system, each planet revolves around the Sun in a fixed path called an orbit.
► The orbit of each planet has an ellipse (oval) shape.
► Earth revolves around the Sun at a speed nearly equals 107000 km per hour.

But, what keeps the planets revolve around the Sun in fixed orbits?
► Gravity is the invisible attraction or pulling force that holds all the planets in their places.
► The great gravitational pulling force of the Sun keeps the planets revolving in fixed orbits.
► If there were no gravity, the planets would fly off into space.



بالتوفيق
مستر احمد الباشا