Question

The density contrast across which one of the following transitions in the Earth is maximum?

• A. Upper crust – lower crust
• B. Upper mantle – lower mantle
• C. Lower mantle – outer core
• D. Outer core – inner core

Hint:

The density contrast between layers of the Earth plays a crucial role in understanding seismic wave propagation and the Earth's interior structure.

Answer 1

The Correct Option is C

The density contrast across the transition from the lower mantle to the outer core is the maximum. This is due to the significant differences in density between the two layers: the lower mantle is solid, whereas the outer core is liquid, leading to a significant density change.
The Earth's core, especially at the boundary between the outer core and inner core, exhibits the greatest contrast in material properties, significantly affecting seismic waves and other geophysical measurements.
Thus, the correct answer is option (C). Final Answer: \[ \boxed{\text{Lower mantle – outer core}} \]