theme6,7

[شوقية]

Theme 6, 7

The water on earth, understanding energy

1-put (/) for true and(x) for false:

More than half of the earth's surface is covered with land.-1

2-sea water is best for drinking. ( )

3-most of the pollution in rivers and lakes is caused by man.

4- Seas, oceans and rivers are sources of clean water. ( )

5- Glaciers are formed near the rivers. ( )

6-you can do work even if you do not have energy. ( )

7- Energy is available in various forms. ( )

8-fuels have stored energy in them. ( )

9- Sun is an important source of energy. ( )

10- Light energy is the most important form of energy. ( )

11- We need energy to do work. ( )

12- We get energy from food. ( )

13-if a car stops, it has kinetic energy. ( )

14- Work is done when you cannot move the wall. ( )

15- Thunder is a form of sound energy. ( )

2- Name these:

1-several rivers begin from them.------------------

2- water with dirt and germs in it.------------------------------

3- removes dirt from the water.-------------------

4- used to clean the water.-------------------------------------

5-it is required to do work ………………………………………………

6-this form of energy is used by plants to make food ……………………………………………

7-this form of energy is required to make electricity in dams ---------------------------------------------------

8-our body stores energy in the form of it -------------------------------------------------

9-thing are burnt to produce energy ----------------------------

3-Hoe does river water get polluted ?

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4-Describe how water is cleaned before supplying to our house? ---------------------------------------------------------

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5- what do you understand by fuels?Name some common fuels?-----------------------------------------------------------------------------------------------------------------------------------------------------

بسم الله الرحمن الرحيم

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