What state of matter is the outer core and why?

Question

A.
solid, because it is not hot enough to melt iron and nickel and be a liquid
B.
solid, because it has so much weight pushing down on it from the other layers
C.
liquid, because the iron and nickel it is made of are under such high temperature and pressure
D.
liquid, because the spinning motion applied to it causes the iron and nickel molecules to move like a liquid

Answer 1

The correct answer is:

C. liquid, because the iron and nickel it is made of are under such high temperature and pressure.

The outer core of the Earth is composed primarily of liquid iron and nickel, and it exists in a liquid state due to the extremely high temperatures (ranging from about 4,000 to 6,000 degrees Celsius) that exceed the melting point of these metals, even under the immense pressure found at that depth.