Multiple choice

Mohorovicic discontinuity separates

  1. Upper mantle and lower crust

  2. Mantle and asthenosphere

  3. Inner solid core and outer liquid core

  4. Core and Mantle

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Explanation

The Mohorovicic discontinuity (Moho) is the boundary between Earth's crust and the mantle. It occurs at varying depths - 5-10 km beneath oceans and 30-50 km beneath continents. At this boundary, seismic wave velocities change abruptly due to differences in composition and density between crustal and mantle rocks.