Which is Earth's outermost layer?

Which is Earth's outermost layer?

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

Answer: (A)

Understanding Earth's layered structure helps here. The outermost solid shell of Earth is the crust, which forms the surface you stand on. Beneath it lies the mantle, then the core. The atmosphere, while it surrounds the planet, is a gaseous envelope outside the solid and liquid layers and is not part of Earth’s internal layered structure. So the crust is the outermost layer of Earth’s internal structure.

Understanding Earth's layered structure helps here. The outermost solid shell of Earth is the crust, which forms the surface you stand on. Beneath it lies the mantle, then the core. The atmosphere, while it surrounds the planet, is a gaseous envelope outside the solid and liquid layers and is not part of Earth’s internal layered structure. So the crust is the outermost layer of Earth’s internal structure.