Page 11 - sheet 2nd term prim 4_Classical
P. 11

Delta Modern Language School
Grade 4
Date ......./......./………

 Uses of electricity generated by solar panels:

        1. Lighting the streets.
        2. Recharge some types of batteries.
        3. Operate various electric devices.
        4. Operate irrigation equipment in some villages.

              Energy chain of the wind turbines

 Radiant      Converts into  Heat energy           Converts into  Kinetic
  energy                                                          energy
(From the
                                                                  (In wind turbines)
    sun)
                             (When temperature
                             vary between hot air

                                  and cold air)

                                                                             Electrical energy
                                                                             (In power lines)

Hydroelectric energy (Hydroelectricity):

   ➢ It is a type of electrical energy by water turbines in dams.

              The use of water to                  The use of wind to
              generate electricity                 generate electricity

Differences   • Water is used in                   • Wind is used in
Similarities     places where dams                    places with strong

              are built on rivers.                 winds.

                             • They are renewable resources.

                             • They use kinetic energy.
                             • They operate turbines.
                             • They generate electricity.

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