Grade 4 | SCIENCE | Unit 4 - Concept 2 - Lesson 1 | Canyons

الصف الرابع الابتدائي ساينس
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لينك تحميل الملزمة
https://drive.google.com/file/d/12ogt...

لينك تليجرام
https://t.me/scimrahmedelbasha

In This Video :
Canyons

► When the water is moving over the sand, it pushes some of the sand out of the way.
► As the water moves the sand, it leaves an impression where the water flowed.
► This is the same idea of canyons formation .
► Canyons are formed due to erosion by water for a long period of time, as water can wear away landscapes and move sediments.

Canyons differ in their colors, texture and shape of rocks, where:
- Wadi Nakhr canyon in Oman its color is brown and black but the Small Canyon in Thailand has a reddish color.

- Canyons can have V-shape as in colored canyons in Sinai and Wadi Rum canyon
in Jordan.

Canyon formation:
The opposite picture shows a small canyon at the beginning of its formation by the effect of a stream of water, which can be observed from the following evidence:
- Trees and other plants that are growing on both sides of canyon, need water to grow.
- The sides are gently sloped due to the help of water in wearing (eroding) the sides down.

From the previous example we can predict that:
• Water streams that flow over flat land will probably form small canyons.
• The small canyon shown above could get deeper if it rained a lot, and water ran
through it again.
Beside canyons, there are many other forms of landforms .


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