homework 28/9/17

How does a solid become liquid
This becomes when a solid like ice or iron get the temperature more tan 300C and make that the particles move very fast in the structure of the material make them melt in the case of the ice is more than 50C.

Freezing
Is when the particles don't move in the structure of a material for example water.Its become when the temperature digress to 0C and in metal is less dan -30C to make that the particles stop on the metal lake the iron.

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