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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 gain energy, move
particles release energy, move faster so it becomes water.
slower so it becomes ice.
101
First Term
