Page 44 - Grade 5 Illustrated Science Dictionary
P. 44

Changes in states of matter






           A change of state is a physical change in a matter. They are reversible changes and do
          not involve any changes in the chemical makeup of the matter. Common changes of the
          state include melting, freezing, sublimation, deposition, condensation, and vaporization.
                               These changes are shown in the figure given below.





































                                                Five Changes of State

              Melting            Freezing         Evaporation           Condensation           Sublimation


                               The process                                                   The transition of
          The process by        by which a       The process by        The process by        the solid phase to
              which a                                which a
                                                                                               the gaseous
                                substance
             substance        changes from          substance         which a substance        phase without
                                                                      changes from the
           changes from                           changes from
                                 the liquid
                                                                      gaseous phase to
                                                                                                passing the
           the solid phase     phase to the      the liquid phase     the liquid phase is      intermediate
            to the liquid                        to the gaseous
                                                                          known as
          phase is known      solid phase is     phase is known         condensation.         liquid phase is
                                                                                                 known as
                                known as
             as melting.                         as evaporation.
                                 freezing.                                                     sublimation.
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