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SAI INTERNATIONAL SCHOOL

                                           SCIENCE HOME ASSIGNMENT

                                                   STAGE-5(GRADE-4)

               Faruk and Ali used a sound level meter to measure the volume of different sounds.
               They held the sound level meter exactly the same distance away from each source of sound.
               These are their measurements of the volume of each sound:

               Clapping hands: 75dB
               Blowing a whistle: 80dB
               Slamming a door shut: 90dB
               Class talking: 65dB


               1  What does dB stand for?

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               2  What was the control variable in their investigation (the variable that remained the same)?

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               3  What was the independent variable in their investigation (the variable that changed)?

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               4  Record the results in the table below from quietest to loudest.

                                    Sound                                  Volume in dB
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