The partially molten upper mantle material called ___________ is a mechanically vulnerable layer beneath the lithosphere characterised by low seismic wave velocity and high attenuation.

Question

Question

This question was previously asked in

SSC CGL 2023 Tier-I Official Paper (Held On: 20 Jul 2023 Shift 2)

Answer 1

The correct answer is asthenosphere.Key Points

Asthenosphere:-
- It is a partially molten layer of the upper mantle that lies beneath the lithosphere, which is the solid, outermost shell of the Earth.
- The asthenosphere is characterized by low seismic wave velocity and high attenuation, which means that seismic waves slow down and lose energy as they pass through this layer.
- The asthenosphere is mechanically weak and ductile, which allows the lithosphere to move and float on top of it.

Additional Information

Magnetosphere:-
- It is the region around a planet where its magnetic field is dominant and protects it from the solar wind.
Mesosphere:-
- It is the layer of the Earth's atmosphere above the stratosphere and below the thermosphere.
Stratosphere:-
- It is the layer of the Earth's atmosphere above the troposphere and below the mesosphere.