Which discontinuity is found between the upper mantle and the lower mantle?

The Moho discontinuity marks the boundary between which two layers of the Earth?

The distance between the earth and the sun is greater during

In the structure of planet Earth, below the mantle, the core is mainly made up of which one of the following?

Which one of the following is found in the innermost part of the Earth?

Which one of the following is NOT a type of plate boundary?