الصف الرابع الابتدائي ساينس
ساينس رابعة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/1nVJFCf9MgBbdTie3a_J4TGk4l8LBR9E9/view?usp=sharing

لينك تليجرام
https://t.me/scimrahmedelbasha

In This Video :
Energy chain while riding a bike
Energy chain when a light bulb is switched on
Energy can be changed from one form into another, where the new energy cannot be created from nothing, and the old energy does not disappear but it changes from one form of energy into another, this is called " law of conservation of energy"
The law of conservation of energy
Energy can neither be created nor destroyed, but only converted from one form of energy into another.

بالتوفيق
مستر احمد الباشا