.

Moreover, why is the inner core solid but the outer core is liquid?

Most materials, including iron and nickel, change from liquid to solid at lower temperatures and/or higher pressures. Although the inner core is very hot, it is solid because it is experiencing very high pressure. The pressure in the outer core is not high enough to make it solid.

Beside above, is the outer core solid liquid or gas What keeps it in this phase? The temperature in the inner core can easily melt both iron and nickel but, because of too much pressure, the particles of iron and nickel are being compressed no to be able to do phase changes to turn into liquid. Too much pressure in the inner core keeps it in a solid phase and having a very high density.

Subsequently, question is, is the Earth's core solid liquid or gas?

At the center of the Earth is the core, which has two parts. The solid, inner core of iron has a radius of about 760 miles (about 1,220 km), according to NASA. It is surrounded by a liquid, outer core composed of a nickel-iron alloy. The outer core is about 1,355 miles (2,180 km) thick.

Is the mesosphere solid or liquid?

It is a solid that can behave like a liquid, and it is about 440km thick. 3. Mesosphere –The mesosphere is another rigid layer in the earth and it is roughly 2,200km in thickness.