What is the outermost shell of the Earth called?

• A. Crust
• B. Mantle
• C. Outer Core
• D. Inner Core

Answer: (A)

The outermost shell of the Earth is called the crust. This layer is relatively thin compared to the underlying layers of the Earth, such as the mantle and the core. The crust consists of solid rock and is what we live on, encompassing both the continental landmasses and the ocean floors. It plays a crucial role in geological processes and is where phenomena like earthquakes and volcanic activity occur.

In contrast, the mantle lies beneath the crust and is made up of semi-solid rock that flows slowly over time. The outer core, further down, is liquid and primarily composed of iron and nickel, while the inner core is a solid sphere made of iron and nickel under immense pressure and temperatures. Understanding the distinction between these layers helps clarify their unique properties and characteristics within Earth's structure.