Front

What describes the outer core?

Back

Liquid

Front

Which layer is the thickest?

Back

Mantle

Front

What is the definition of a 'mantle'?

Back

The layer of hot, solid material between the Earth's crust and core.

Front

How have scientists inferred the internal structure of Earth?

Back

Scientists analyze how earthquake waves move through Earth's interior.

Front

What is the Earth's crust?

Back

The outermost layer of the Earth, composed of solid rock.

Front

What is the Earth's mantle?

Back

The layer of hot, solid material between the Earth's crust and core.

Front

What is the Earth's outer core?

Back

A liquid layer composed mainly of iron and nickel.

Front

What is the Earth's inner core?

Back

A solid sphere made primarily of iron and nickel.

Front

What is the primary method used to study Earth's interior?

Back

Seismology, which involves analyzing seismic waves.

Front

What are seismic waves?

Back

Waves of energy that travel through the Earth, generated by earthquakes.