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     Delta Modern Language School
Grade 4
Date ......./......./………
Q. (4) – Write the scientific term for each of the following:
1- The Primary source of energy on Earth                      (………………..)
2-A turbine used to generate electricity from wind movement   (………………..)
3-The energy used to produce electrical energy in watermills  (………………..)
 Q. (5) – Give reason for:
1-Wind is considered as a source of electricity.
………………………………………………………………………………………….....
2-We can use solar energy in cooking food.
…………………………………………………………………………………………….
3-Greenhouses are very important for farmers.
…………………………………………………………………………………….……...
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