Geologic Hazards- Internal Structure

Front

What is the MOHO?

Back

The MOHO, or Mohorovičić Discontinuity, is the boundary between the Earth's crust and the mantle.

Front

Why is the crust important to us?

Back

We care so much about the crust because we live here!

Front

What is the asthenosphere?

Back

The asthenosphere is the upper layer of the Earth's mantle, where there is relatively low resistance to plastic flow and convection is thought to occur.

Front

What are hot spots in geology?

Back

Hot spots are volcanic regions fed by underlying mantle that is anomalously hot, such as the Hawaiian Islands.

Front

Who contributed to the theory of seafloor spreading?

Back

Both Alfred Wegener and Harry Hess contributed to the theory of seafloor spreading.

Front

What is the Earth's crust?

Back

The Earth's crust is the outermost layer of the Earth, consisting of solid rock and soil.

Front

What is the mantle?

Back

The mantle is the layer of the Earth between the crust and the core, composed of semi-solid rock that flows slowly.

Front

What is the core of the Earth?

Back

The core is the innermost layer of the Earth, composed mainly of iron and nickel, and is divided into a solid inner core and a liquid outer core.

Front

What is tectonic plate movement?

Back

Tectonic plate movement refers to the motion of the Earth's lithosphere, which is divided into several large plates that float on the semi-fluid asthenosphere.

Front

What causes earthquakes?

Back

Earthquakes are caused by the sudden release of energy in the Earth's crust, often due to tectonic plate movements.