Question

Which of these statements best explains why the inner core of Earth does not melt although it has very high temperatures?

The liquid outer core cools the inner core.
The plastic mantle conducts the heat away from the core.
The iron which makes up the core melts at very high temperature.
The different layers of Earth exert pressure to keep the inner core solid.

Please don answer unless your fairly sure of yourself. thank you

Answer 1

The core is in a cube structure, extreme temperatures make the atoms to move so quickly that there is no alteration of the structure hence, no melting.

Step-by-step explanation:

In the case of extremely high temperatures, atoms change position but still keep their original shape.

Further explanation:

In the case of high temperatures, the atoms making up a cube move rapidly and change position, the change of position is the melting.

Answer 2

Option D, The different layers of Earth exert pressure to keep the inner core solid.

Step-by-step explanation:

Due to extreme high pressure at the core of the earth, the iron does not convert into liquid form. According to a research conducted by KTH Royal Institute of Technology, the iron acquires the body-centred cubic structure when it is at normal pressure but when the pressure is extremely high the iron acquires the shape of hexagonal with 12 points which is a close packed structure. Due to this close pack structure, iron remains solid in the inner core of earth.

Hence, option D is correct