Question

Q. Match the following:

Discontinuity	Boundary
1. Moho	(a) Outer core and inner core
2. Guttenberg	(b) Crust and mantle
3. Lehman	(c) Mantle and core

Select the correct answer using the code given below:

• A. 1-a, 2-c, 3-b
• B. 1-c, 2-b, 3-a
• C. 1-b, 2-c, 3-a
• D. 1-b, 2-a, 3-c

Answer 1

The correct option is C 1-b, 2-c, 3-a

Explanation:

• Discontinuity is a zone within the earth where a sudden change in physical properties, such as the velocity of earthquake waves, or Density occurs.
• The discontinuity between the upper and lower crust is called the Conrad Discontinuity.
• The Mohorovicic discontinuity, usually referred to as the Moho discontinuity, is the boundary between the Earth's crust and the mantle. It occurs at an average depth of about 8 kilometers beneath the ocean basins and 32 kilometers beneath continental surfaces.
• The discontinuity between the upper mantle and the lower mantle is known as Repetti Discontinuity.
• The outer core is separated from the inner mantle by Guttenberg Discontinuity.
• The discontinuity between the outer core and the inner core is called Lehmann Discontinuity.