الصف الرابع الابتدائي ساينس
ساينس رابعة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/1-lAesNSz5gsoN_eCn0dxCWwPgXZBkO1N/view?usp=sharing

لينك تليجرام
https://t.me/scimrahmedelbasha

In This Video :
Falling water
- Rivers flow downhill and during this process the gravitational potential energy of water is converted into kinetic energy that helps rotate water turbines to generate electricity.
- Dams are built on rivers to control the water flow and increase the potential energy of water .
- There is a type of dams called hydroelectric dam which is used to generate electricity using the flow of water.

How can electricity be generated from dams using water turbines?
1. A hydroelectric dam prevents the flow of river water, so the potential energy of water increases.
2. When water is released, it flows through water turbines in the dam and the potential energy of water is converted into kinetic energy.
3. The flow of falling water that has kinetic energy helps water turbines rotate that operate generators to generate electricity.
4. This electricity is sent through long electric wires to the places where it is needed, and this type of electricity is called "hydroelectric energy" or "hydroelectricity".

Hydroelectric energy (hydroelectricity)
It is a type of electrical energy generated by water turbines in dams.


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