Earth's Interior Review

Front

How do scientists know that there are different structural layers inside Earth?

Back

By tracking seismic waves from earthquakes.

Front

Which structural layer inside Earth is the only liquid layer?

Back

Outer core.

Front

The mantle is made primarily of what rock?

Back

Peridotite.

Front

In general, how are the materials of the Earth's core different from those of the crust?

Back

They are more dense.

Front

What is the solid, plastic structural layer of Earth?

Back

Asthenosphere.

Front

What are the three main layers of the Earth?

Back

Crust, mantle, core.

Front

What is the outermost layer of the Earth called?

Back

Crust.

Front

What is the primary composition of the Earth's inner core?

Back

Iron and nickel.

Front

What is the difference between the lithosphere and the asthenosphere?

Back

The lithosphere is rigid, while the asthenosphere is semi-fluid.

Front

What is the role of seismic waves in understanding Earth's interior?

Back

They help scientists infer the structure and composition of Earth's layers.