Question

The Earth's core is a critical part of its internal structure. Choose the statements that accurately describe the Earth's core:

1. The core consists of two layers: the outer core and the inner core.
2. The outer core is primarily composed of solid iron and nickel.
3. The inner core is extremely hot and under immense pressure
4. The Earth's magnetic field is generated by the movements of the material in the outer core.

• A. iv only
• B. ii, iv
• C. i, iii, iv
• D. None of these

Answer 1

Answer:

C. i, iii, iv

The Earth's core

• The Earth's core is the innermost layer of the planet, located beneath the mantle. 
• It is primarily divided into two layers as the outer core and the inner core.

Outer Core:

• This layer lies just beneath the mantle and extends to a depth of about 2,900 kilometers (1,800 miles) toward the Earth's center.
• It is primarily composed of molten(liquid) iron and nickel.
• The movement of material in the outer core is responsible for generating the Earth's magnetic field through a process known as the geodynamo effect.

Inner Core:

• It is located beneath the outer core
• The inner core extends from about 5,150 kilometers (3,200 miles) to the center of the Earth.
• The inner core's temperature is extremely high.
• Despite extremely high temperatures ,the inner core remains solid due to the immense pressure at this depth.
• It is composed of solid iron and nickel.