Question

The dividing line between the outer core and the inner core ?

• A. Lehman Discontinuity
• B. Conrad Discontinuity
• C. Guttenberg Discontinuity
• D. None of the above

Answer 1

Answer:

A. Lehman Discontinuity

• The core is the central, innermost part of the Earth, comprising two layers

• Inner Core

  1. Solid, iron-nickel alloy (~85% iron, ~10% nickel)

  2. Radius: approximately 1,220 km (758 miles)

  3. Temperature: 5,000°C - 6,000°C (9,032°F - 10,832°F)

  4. Pressure: 3.5 million times atmospheric pressure

  5. Density: 13.0 g/cm³

  Outer Core

  1. Liquid, iron-nickel alloy (~85% iron, ~10% nickel)

  2. Radius: approximately 2,250 km (1,399 miles)

  3. Temperature: 4,000°C - 5,000°C (7,232°F - 9,032°F)

  4. Pressure: 1 million times atmospheric pressure

  5. Density: 9.9 g/cm³

• Lehman Discontinuity - It separates outer core and the inner core