Skating on ice shows that on increasing the pressure, the melting point of ice decreases. The pressure applied by the skater’s weight lowers the melting point of the ice, causing it to briefly melt and form a thin layer of water beneath the skate blades.
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Skating on ice shows that on increasing the pressure, the melting point of ice decreases (B). When pressure is applied by the skater’s weight, it lowers the melting point of the ice underneath the skate blades. This occurs because pressure causes the ice molecules to come closer together, making it harder for them to maintain their solid structure. As a result, the ice briefly melts, forming a thin layer of water between the skate blades and the ice surface. This reduced melting point allows for easier gliding of the skates on the ice. Option (B) accurately reflects this phenomenon, indicating that the melting point of ice decreases under increased pressure, making it the correct choice to explain the observation of skating on ice.