Multiple choice Moho-discontinuity is found between the crust and mantle upper mantle and lower mantle mantle and core inner core and outer core Reveal answer Fill a bubble to check yourself A Correct answer Explanation The Mohorovicic discontinuity, commonly called the Moho, is the boundary layer that separates the Earth's crust from the underlying mantle. It is identified by a sharp increase in the velocity of seismic waves.