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SAI INTERNATIONAL SCHOOL
                                                        Class-7

                                                Home Assignment
                                                  Subject-Physics
                                      Ch.- Water: The Life-giving Liquid

                              Subtopic- Sources of Water & Types of Water


        INSTRUCTIONS:
        Please solve or paste the worksheet in the Physics Copy.
        For Assertion& Reason question follow the following directions.
               DIRECTION: Each of these questions contains an Assertion followed by Reason. Read them carefully and
               answer the question on the basis of following options. You have to select the one that best describes the two
               statements.
               (a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
               (b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
               (c) If Assertion is correct but Reason is incorrect.
               (d) If Assertion is incorrect but Reason is correct
               (e) If Assertion & Reason both are incorrect.
               Sl.No       QUESTIONS                                                                    MARKS

                           Assertion: The main source of natural fresh water on the earth is            1
                           rain.
                      1    Reason: Sea and ocean cover almost 70% of the Earth’s surface.



                           Water that collects on the surface of the Earth is called……… water           1
                      2

                           ……………….is caused by bicarbonates of calcium and magnesium                    1
                      3
                           salts.
                           The process of seeping of water under the ground is called                   1
                      4    infiltration.(True/False)


                           The area where water fills the aquifer is called the                         1

                               a)  Saturated zone.
                      5        b)  Fault zone
                               c)  Filtration
                               d)  All of these
                           This reservoir formed above the impervious layers of rock or clay is         1
                           termed as


                      6        a)  Aquifer
                               b)  Desalination
                               c)  Salinity
                               d)  Infiltration
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