Question

From the top of the stifer mantle to the center of Earth, the rock material is inferred to be

solid all the way to the center of the inner core
solid, then liquid, then gaseous to the center of the
inner core
solid, then liquid to the center of the inner core
solid, then liquid, then solid again to the center of
the inner core

Answer 1

The rock materials from the stiff mantle to the Earth's center transition from solid to liquid and then back to solid in the inner core, with a liquid outer core and a solid inner core made of iron and nickel.

Step-by-step explanation:

From the top of the stiff mantle to the center of Earth, the rock material is inferred to be solid, then liquid, then solid again to the center of the inner core. The mantle is a large part of the Earth that is more or less solid, with rock material that can deform and flow slowly under high temperatures and pressures. Below the mantle, starting at a depth of approximately 2,900 kilometers, lies the Earth's core, which is divided into two parts: a liquid outer core and a solid inner core. The outer core is composed of liquid iron and nickel, believed to be the source of the Earth's magnetic field, whereas the inner core is thought to be solid, composed mainly of an iron and nickel alloy due to the immense pressure it is under.