Q. Skating on ice is possible because
A) ice is cold
B) the surface of ice is smooth
C) the pressure on the ice due to skate raises its melting point
D) the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
✔ Correct Answer: the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
Exam Insight
Skating on ice is possible because the pressure exerted by the skate blade on the ice melts the surface slightly, creating a thin layer of water that reduces friction and allows for smooth movement.