Question

Mohorovicic discontinuity is the boundary between and
A) crust and core
B) mantle and core
C) crust and mantle
D) None of these

Answer 1

Hint: Earth's divisions include core, mantle, and crust. The crust, which is made up primarily of oceanic crust and continental crust, accounts for less than 1% of the Earth's total mass. The mantle is extremely hot and accounts for roughly 68 percent of the Earth's mass. Finally, the heart is primarily composed of iron metal.

Complete answer:
The interior of the Earth is made up of a variety of materials. Physical and chemical properties such as temperature, density, and other factors distinguish each of these materials. Within the earth, there are different layers based on their characteristics. A transition zone separates all of those layers from one another. Discontinuities are the term for these transition areas.

In the universe, the Moho is the boundary between the crust and the mantle. This is the depth at which seismic waves change velocity as well as chemical composition. It's also known as the Andrija Mohorovicic' discontinuity', after the Croatian seismologist who discovered it, Andrija Mohorovicic' (1857-1936). About 25 and 60 kilometres deep underneath the continents, and between 5 and 8 kilometres deep underneath the ocean floor, the boundary exists. The Mohorovicic discontinuity is important because it marks the transition between the liquid magma mantle and the hardened magma that makes up the crust.

Thus the correct answer is option ‘C’.

Note: This is the depth at which seismic waves change velocity as well as chemical composition. It's also known as the Andrija Mohorovicic' discontinuity', after the Croatian seismologist who discovered it, Andrija Mohorovicic' (1857-1936).