EARTH SCIENCE
EARTHQUAKES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the material of which the mantle is composed
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the boundary between the outer and inner core
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boundary between the crust and the mantle
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an area of the mantle that will not transmit seismic waves
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Detailed explanation-1: -The Mohorovicic Discontinuity, or Moho is the boundary between the crust and the mantle. This boundary is located at approximately 2891 km depth beneath the Earth’s surface. The boundary is observed via the discontinuity in seismic wave velocities at that depth.
Detailed explanation-2: -The Moho is widely believed to be the boundary between Earth’s crust and an underlying layer of denser rocks in Earth’s interior called the mantle.
Detailed explanation-3: -The division in the lithosphere between the crust and the mantle is called the Mohorovicic discontinuity, or simply the Moho.
Detailed explanation-4: -Moho, or Mohorovičić discontinuity, boundary between the Earth’s crust and its mantle. The Moho lies at a depth of about 22 mi (35 km) below continents and about 4.5 mi (7 km) beneath the oceanic crust. Modern instruments have determined that the velocity of seismic waves increases rapidly at this boundary.
Detailed explanation-5: -In 1909, Andrija Mohorovičić, a Croatian seismologist, discovered the boundary between the crust and the mantle by observing the sudden increase of seismic waves as they passed from the crust to the mantle.