الصف الرابع الابتدائي ساينس
ساينس رابعة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/1O7-rL21LQfOd3rqeO_f2FOYSNb9RwkCN/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Video :
Shaping the Earth
In this activity, we are going to understand some processes through which the Earth's surface changes, these processes include weathering, erosion and deposition that can be shown in the following figure.

From the previous figure we can observe that:

A. Mechanical weathering
It is the breaking down of rocks due to the effect of physical factors like wind, water, plant roots and temperature.

B. Chemical weathering
It .is the change of the structure of rocks due to chemical reactions .

Chemical weathering happens due to the chemical reactions of rocks with some other materials such as:
1. Oxygen.
2. Water.
3. Acid rain.
4. Acid produced by some living organisms.

بالتوفيق
مستر احمد الباشا