Page 11 - ..Science E-book Prim.5 2024-2025 1st term part2_Neat
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? Matter can be changed from one state to another without
     any changes in its amount or total number of particles.

                                    0 ?C is the
                                     freezing
                                     point of
                                      water.

 When the water temperature                       When the ice temperature
  decreases below 0 ?C, its                       increases above 0 ?C, its

particles release energy, move                   particles gain energy, move
   slower so it becomes ice.
                                                 faster so it becomes water.
 First Term
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