It has no linear dimensions.
Nearly true. It is a point estimate, not point ofestimate.
True
true
true
True
True. Perigee is the point in the moon's orbit when it is closest to Earth.
true
true
True
True
True. The temperature at which a liquid turns into a gas is called the boiling point.
True. The freezing point of a substance is the temperature at which it changes from a liquid phase to a solid phase, while the melting point is the temperature at which it changes from a solid phase to a liquid phase. In equilibrium, the freezing point and melting point of a substance are the same.