Why is the inner core made from solid metal, while the outer core is made of molten metal?
A. The temperature of the inner core is higher than the outer core
B. The temperature of the inner core is lower than the outer core
C. The pressure of the inner core is higher than the outer core
D. The pressure of the inner core is lower than the outer core
the pressure on the inner core is greater than the pressure on the outer core and the melting point of iron, the main constituent of the core, increases as soon as the pressure goes up