What is the term for the layer between the earth's crust and its core?

What is the term for the layer between the earth's crust and its core?

• A. Mantle
• B. Ocean
• C. Crust
• D. Core

Answer: (A)

The layer between the earth's crust and its core is the mantle. It sits beneath the crust and above the core, making up most of Earth's volume and containing a upper part and a lower part, with the upper portion including the asthenosphere where rocks flow very slowly to enable plate motion. The boundary between the crust and mantle is known as the Mohorovičić discontinuity, while the boundary between the mantle and core is the Gutenberg discontinuity. The other terms don’t fit because the ocean is a surface feature, not a deep layer; the crust is the outermost shell itself; and the core lies at Earth's center beneath the mantle.

The layer between the earth's crust and its core is the mantle. It sits beneath the crust and above the core, making up most of Earth's volume and containing a upper part and a lower part, with the upper portion including the asthenosphere where rocks flow very slowly to enable plate motion. The boundary between the crust and mantle is known as the Mohorovičić discontinuity, while the boundary between the mantle and core is the Gutenberg discontinuity. The other terms don’t fit because the ocean is a surface feature, not a deep layer; the crust is the outermost shell itself; and the core lies at Earth's center beneath the mantle.