The solid upper part of the Earth comprising the crust and the upper mantle?

The solid upper part of the Earth comprising the crust and the upper mantle?

• A. Lithosphere
• B. Open System
• C. Biosphere
• D. Closed System

Answer: (A)

The solid outer portion of the Earth that includes the crust and the upper mantle is the lithosphere. It’s the rigid, outer shell that forms the tectonic plates, floating on and above the weaker, more ductile layer beneath—the asthenosphere—which allows those plates to move. The biosphere refers to living organisms and their environment, while open and closed systems describe how matter and energy flow in models, not the actual structural layers of the planet. So the lithosphere is the term that best fits the solid upper part made up of crust plus the upper mantle.

The solid outer portion of the Earth that includes the crust and the upper mantle is the lithosphere. It’s the rigid, outer shell that forms the tectonic plates, floating on and above the weaker, more ductile layer beneath—the asthenosphere—which allows those plates to move. The biosphere refers to living organisms and their environment, while open and closed systems describe how matter and energy flow in models, not the actual structural layers of the planet. So the lithosphere is the term that best fits the solid upper part made up of crust plus the upper mantle.