Question

Which of the following best explains why Earth is tectonically active?

Answer 1

Answer:

C. Earth's solid surface layer sits on a moving, semiliquid layer.

Explanation:

Earth is highly tectonically active because the solid layer of the earth sits on a moving, semi-liquid layer.

The earth's crust is broken into slabs. Together with part of the upper mantle, they form a layer called the lithosphere. These solid lithospheric bodies are called tectonic plates.

• Under the plates is a semi-molten layer under great temperature.
• As the molten layer moves, it carries the lithosphere on top of it.
• This causes the movement of the plates in different directions.
• The semi-liquid layer is called the asthenosphere

This is the reason why the earth is tectonically active.