الصف الرابع الابتدائي ساينس
ساينس رابعة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/12n6p4ys6DMxtZIu1NHzS9yZ5HDj3uqM7/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Video :
Activity: to model and explore both mechanical and chemical weathering to understand the similarities and differences between them.
Observations
1. In the first step, biscuits are broken down into smaller parts, but they still looked
like biscuits.
2. In the second step, biscuits dissolve and mix with water containing antacid causing a formation of different material.

Conclusions
1. In the mechanical weathering , the substance is broken into smaller parts without changing its nature.
2. In the chemical weathering, the substance is broken into smaller parts and another substance is formed as a result of chemical reactions.
3. Chemical weathering causes greater changes to substances than that happen in mechanical weathering.
Weathering
• Now, we are going to deduce if this landform shown below is affected by mechanical weathering or chemical weathering.
- You will notice from the previous picture that rocks are broken into smaller pieces with different shapes of the same material.
- This process is similar to that happened to biscuits broken by hands in the previous activity, this leads us to conclude that the landform shown above has been mechanically weathered over time.

بالتوفيق
مستر احمد الباشا