What is the approximate diameter of the Earth's core?

The Earth's core has an approximate diameter of about 7000 kilometers. This core consists of two parts: the outer core, which is liquid and primarily composed of iron and nickel, and the inner core, which is solid and made predominantly of iron. The inner core is thought to be around 1200 kilometers in radius, while the outer core contributes to the overall diameter.

Understanding the structure of the Earth is key in mining engineering as it affects geotechnical assessments, resource exploration, and environmental considerations. Accurate knowledge of the Earth's core dimensions helps professionals understand geophysical processes, such as the generation of the magnetic field, which is influenced by movements in the liquid outer core.

The other diameter choices do not align with current geological findings; thus, they do not accurately reflect the Earth's core size according to established scientific data.