The immense pressure from the layers outside of the inner core.
The Earth's inner core remains solid due to the immense pressure that exists at the center of the planet. This pressure is so high that it prevents the iron and nickel in the inner core from melting, despite the high temperatures. Additionally, the inner core's solid state is maintained by the slow cooling and freezing process that occurs as heat escapes from the core to the outer layers of the Earth.
An alloy of solid nickel and iron, mostly.
The mantle! I remember learning this in geography :)
So far as science can deduce, it must be a solid.
The inner core Is solid and the outer core in liquid
The solid inner and liquid outer core.
The immense pressure from the layers outside of the inner core.
a solid ball of iron
Yes the refraction path of the p-wave tells us that the earths inner core is solid.
the inner core
iron and nickel is the answer and so is the inner core. the inner and the outer and together but the outer core is liquid and the inner core is solid
Both! The outer core is in a liquid state and the inner core is a solid. Both the inner and outer core are formed mainly of iron and nickel.
the outer core is liquid; the inner core is solid
The Earth's inner core remains solid due to the immense pressure that exists at the center of the planet. This pressure is so high that it prevents the iron and nickel in the inner core from melting, despite the high temperatures. Additionally, the inner core's solid state is maintained by the slow cooling and freezing process that occurs as heat escapes from the core to the outer layers of the Earth.
The inner mantle is hotter than the outer mantle. Temperatures in the inner mantle can reach up to 4,000 degrees Celsius, whereas temperatures in the outer mantle range from about 500 to 900 degrees Celsius.
The Inner Core is a liquid. Outer core: solid mantel: inbetween crust: solid