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SAI INTERNATIONAL SCHOOL


               CLASS-IV


                                                                 SCIENCE


               CHAPTER-3- OUR TEETH AND MICROBES



               SUB TOPIC-SETS OF TEETH

               Objective


                   1. Fill in the blanks.

                          a. By the age of three, a child has a set of

                              ____________teeth.

                          b. There are ____________temporary teeth in a child.

                          c.  The first set of teeth in human beings is called
                              as__________ teeth.

                          d. _____________teeth appear as we grow older.

                          e. Temporary teeth are also known as__________ teeth.


               Subjective


                              1. How many sets of teeth do human  beingshave during

                                 their lifetime? Name them.

                              2. Write down five importance of teeth.
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