Science Olympiad Dynamic Planet Practice Test

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Which layer of the Earth is described as being hot and solid, located between the crust and the outer core?

  1. Crust

  2. Core

  3. Inner core

  4. Mantle

The correct answer is: Mantle

The layer of the Earth that is hot and solid, situated between the crust and the outer core, is the mantle. The mantle is composed primarily of silicate rocks that are rich in iron and magnesium, and it extends from the base of the crust to the top of the outer core. It is characterized by a solid state, although it behaves in a ductile manner over long periods, allowing for the slow movement of material within it, which is crucial for tectonic activity and the movement of the Earth's plates. This layer plays a significant role in geological processes such as mantle convection, which drives plate tectonics and the geological activity seen at the surface. Understanding the mantle’s properties and behavior is essential for comprehending the dynamics of the Earth as a whole.

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