What is the outermost layer of Earth called?

What is the outermost layer of Earth called?

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

Answer: (A)

The outermost layer of Earth is the crust. It’s the thin, rigid shell that forms the planet’s surface, supporting land, oceans, and living things. There are two main types: continental crust, which is thicker and less dense, and oceanic crust, which is thinner and more dense. Beneath the crust lies the mantle, much thicker and divided into upper and lower parts. There’s also a term called the lithosphere, which describes the rigid outer shell that includes the crust plus the uppermost mantle; however, the surface layer itself is the crust, which is why that choice is the best answer.

The outermost layer of Earth is the crust. It’s the thin, rigid shell that forms the planet’s surface, supporting land, oceans, and living things. There are two main types: continental crust, which is thicker and less dense, and oceanic crust, which is thinner and more dense. Beneath the crust lies the mantle, much thicker and divided into upper and lower parts. There’s also a term called the lithosphere, which describes the rigid outer shell that includes the crust plus the uppermost mantle; however, the surface layer itself is the crust, which is why that choice is the best answer.