3. why doesn't the temperature of the water change while the ice is melting or boiling?
(what is happening to the heat energy? )

In other words, the water molecules within ice move faster. However, temperature doesn't change as heat is added during a phase change; for example, when the ice melts. During the phase change, the added heat doesn't make the molecules move faster, but rather further apart.

Explanation:

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explanation:

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answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion