Earth's Layers & Seismic Waves

Front

What is the inner core of the Earth?

Back

The inner core is the solid, innermost layer of the Earth, composed mainly of iron and nickel.

Front

What are the two types of crust on Earth?

Back

The two types of crust are oceanic crust and continental crust.

Front

What are S waves?

Back

S waves, or secondary waves, are seismic waves that move through the Earth and can only travel through solids.

Tags

NGSS.MS-PS4-2

Front

What is the lithosphere?

Back

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

Tags

NGSS.MS-ESS1-4

Front

What is the asthenosphere?

Back

The asthenosphere is the semi-fluid layer beneath the lithosphere that allows tectonic plates to move.

Tags

NGSS.MS-ESS2-3

Front

What is the outer core?

Back

The outer core is a liquid layer composed mainly of iron and nickel, located beneath the mantle and surrounding the inner core.

Front

What is the inner core made of?

Back

The inner core is primarily made of solid iron and nickel.

Front

How do seismic waves help us understand Earth's layers?

Back

Seismic waves change speed and direction when they encounter different materials, helping scientists infer the composition and state of Earth's layers.

Front

What are P waves?

Back

P waves, or primary waves, are seismic waves that can travel through solids, liquids, and gases.

Tags

NGSS.MS-PS4-2

Front

What is the mesosphere?

Back

The mesosphere is the layer of the Earth's mantle located below the asthenosphere, characterized by increased pressure and temperature.