Page 173 - New Medley 3 Semester 2
P. 173

FORMS OF WATER

                                                                                                 • Hands-on Learning
           Activity          S E  L   Self-Management

          Take an ice tray. Pour some water in it and place it in the freezer of your refrigerator. Take out
          the tray after 3 or 4 hours and check. What do you get?


        You get ice cubes in the tray.                                                 Water

        You must have added ice                                                        vapour
        cubes to cool your favourite

        drinks. You must have also                                                 Ice
        seen steam coming out of           Water

        a cup of hot soup or tea in                                Three forms of water
        winter. Water is found in three di erent forms.  ese forms are liquid, solid and gas.


           Activity                                                                                    • Creativity

             Take a plastic ice cream container.

             Fill the ice cream container with pineapple or orange juice, insert an ice cream stick on top
              and put it in the freezer of your refrigerator.
             When frozen, take out and enjoy a refreshing flavoured ice.



        Liquid Form of Water

         e water we drink is in liquid form. Rainwater and the
        water in ponds, lakes, rivers and oceans is in liquid form.

        Solid Form of Water

        Is ice solid, liquid or gas? Yes, it is solid. Snow and frost                     Ice cubes             Ice cream

        are other examples of water in the solid form. Liquid water                        Solid form of water
        freezes at 0 degrees Celsius (0°C)

        to become solid (ice).   e process                 Knowledge Zone

        of liquid water changing into solid                  1.  Celsius is a scale that measures temperature.

        ice is called freezing.                              2.  Ice is frozen water while snow is small pieces
                                                                of frozen water that fall from the clouds
        Gaseous Form of Water                                   when  the  temperature  of  clouds  becomes

        Soak your hanky in water, wring                         very low.
        out extra water and leave it in the                  3.  Frost is a thin white layer of ice that forms
                                                                on ground at night when temperature drops
        sunlight. Observe it a er one hour.                     below 0°C.



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