الصف الرابع الابتدائي ساينس
ساينس رابعة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/1MxmT5Jeu1rJ3w2erg8ONy9Aphn678yVd/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Video :
Natural Erosion
► If a child builds a sandcastle on the sea beach, he may notice the disappearance of a part of it or all of it after few hours.
► Water and wind are some of the factors that can transport small rocks from one
place to another forming a process known as "erosion".
► The disappearance of the sandcastle (erosion of the sandcastle) is due to the
transportation of the sand particles from its place to another by the effect of water
and this is considered as an example of natural erosion.

Sandcastles, Rocks, and Canyons
The Earth's surface is continuously changing. Some changes can be very fast, other changes can be very slow that may take hundreds or millions of years.

Canyons
They are deep valleys carved by flowing water.

▌Canyons are formed due to the slow changes that happened to its rocks over many years.

▌A canyon has needle-like parts and slopes at the sides, it is formed by the action of water.

بالتوفيق
مستر احمد الباشا