Question

At the Mohorovicic boundary, which of the following is true?

1) Seismic wave velocity decreases sharply with increasing depth
2) The crust and the mantle are in contact with each other
3) Temperature in Earth's atmosphere changes from increasing with elevation to decreasing with elevation
4) The core changes from liquid to solid
5) Earth's solar system ends and outer space begins

Answer 1

At the Mohorovicic boundary, the crust and the mantle are in contact with each other. The seismic wave velocity increases sharply with increasing depth at the Moho due to the denser and more solid nature of the mantle compared to the crust.

Step-by-step explanation:

At the Mohorovicic boundary, also known as the Moho, the crust and the mantle are in contact with each other. This boundary is located at a depth of about 5-40 kilometers beneath the Earth's surface. It marks the transition between the Earth's rigid outer layer (crust) and the more fluid and deformable layer beneath (mantle).

The seismic wave velocity actually increases sharply with increasing depth at the Moho. This increase in velocity is due to the denser and more solid nature of the mantle compared to the overlying crust.