question: The temperature at which a substance melts is called its what point?
distractor3: freezing
distractor1: boiling
distractor2: change
correct_answer: melting
support: The temperature at which a substance melts is called its melting point. Melting point is a physical property of matter. The gold pictured in the Figure above , for example, has a melting point of 1064°C. This is a high melting point, and most other metals also have high melting points. The melting point of ice, in comparison, is much lower at 0°C. Many substances have even lower melting points. For example, the melting point of oxygen is -222°C.