Earth Composition

Front

What is a seismograph?

Back

A machine that measures the times at which seismic waves arrive at different distances from an earthquake.

Front

Which layer of the Earth is the thickest?

Back

Mantle.

Front

What is the mantle?

Back

The middle layer of the Earth, which contains most of the Earth's mass.

Front

Which layer of the Earth is best described as liquid metal?

Back

Outer core.

Front

Which layer of the Earth is responsible for Earth's magnetic field?

Back

Outer core.

Front

What is the outer core?

Back

A layer of the Earth that is liquid and composed mainly of iron and nickel.

Front

What is the crust?

Back

The outermost layer of the Earth, which is the thinnest layer.

Front

What are the three main layers of the Earth?

Back

Crust, mantle, and core.

Front

What is the core of the Earth?

Back

The innermost layer of the Earth, consisting of a solid inner core and a liquid outer core.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and upper mantle.