Page 61 - Carvaan Science-2
P. 61

Fill a container with water and keep
            it  in  the  freezer.  Leave  it  for  a  few

            hours. You will find that the water has
            changed into ice. Ice is the solid form

            of water.                                                                    Liquid







                Water can change from one form                              Solid                         Gas
            to another by heating or cooling.                                      Forms of Water





                                                                                          O n   Cooling
                Change  of  water  into  water                                Ice

            vapour         on      heating         is     called                                          Water
            evaporation. Change of water vapour                        n  g
                                                                       i  t
            into  water  on  cooling  is  called                      a  e
            condensation.  Change  of  water  into                    H     n                                      On Cooling

            ice  on  cooling  is  called  freezing.                    O
            Change of ice into water on heating                           Water

            is called melting      .                                                                   Steam

            Water Cycle                                                              On Heatin  g


                The change of state of water occurs continuously in nature. It is called
            the water cycle      .






                                      Cloud Formation
                                      Cloud Formation
                                      Cloud Formation
                                                                                   Condensing water vapour
                                                                                   Condensing water vapour
                                                                                   Condensing water vapour
                   Snow
                   Snow
                   Snow
                                                                                                           Evaporation
                                                                                                           Evaporation
                                                                                                           Evaporation
                                                                                                         Ocean contributes
                                                                                                         Ocean contributes
                                                                                                         Ocean contributes
                                                                                                         about 80% of total
                                                                                                         about 80% of total
                                                                                                         about 80% of total
                                              es
                                              es
                                            Lak
                                            Lakes
                                            Lak
                                                                                                         water vapour in air
                                                                                                         water vapour in air
                                                                                                         water vapour in air. . .
                                        Ground water
                                        Ground water
                                        Ground water
                                                                                                 Ocean
                                                                                                 Ocean
                                                                                                 Ocean
                                                                                   Salt water intrusion
                                                                                   Salt water intrusion
                                                                                   Salt water intrusion
                                                          Water Cycle
                                                                 61  Science-2
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