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Learning objectives: Students will be able to know about water, its sources and its forms.

               Water and its Forms

               Water

               All living beings need water to survive. There are different sources of water.  The natural
               sources are wells(groundwater), ponds, streams, rivers and lakes.

               Forms of Water

               Solid water(ice) can change into liquid water which can change into water vapour which can
               again change into water and ice. Thus, we see that there are three forms of water- solid
               (ice), liquid(water) and gas (water vapour).


                                       heating                       heating
                                     Ice                                          Water                                         Water Vapour

                                       cooling                        cooling

               Learning outcome: Students learned about water, its sources and its forms.
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