الصف الرابع الابتدائي ساينس
ساينس رابعة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/1j3wZK-D6IvppuH3ikc8DNbYWbCtUK4on/view?usp=sharing

لينك تليجرام
https://t.me/scimrahmedelbasha

In This Video :
1- Biofuel
It is a fuel that is produced from living organisms that can be planted (i.e., plants).
Biofuel is a renewable energy resource that is continually renewed as plants grow, so it is known as "renewable fuel".
Its primary source : The Sun
Conservation of biofuel :
Although biofuel is a renewable energy resource, it should be conserved (rationalized), where:
2- Fossil fuel
It is a fuel that is produced from old living organisms (plants or animals) that were buried and decomposed over a long period of time .
Fossil fuel is a non-renewable energy resource, because once it is consumed,
it runs out faster than it can be renewed.
Its primary source : The Sun

بالتوفيق
مستر احمد الباشا