Earth's Layers

Front

What does it mean to refract?

Back

To bend.

Front

Which layer of Earth is solid and why?

Back

The inner core is solid because of the extreme pressure from the other layers.

Front

What makes the Asthenosphere unique compared to the other layers?

Back

Its plasticity.

Front

How do seismic waves change as they travel through the Earth?

Back

They change both speed and direction.

Front

What is the asthenosphere?

Back

The soft layer of the mantle on which the tectonic plates move.

Front

What is the Earth's outer layer called?

Back

The crust.

Front

What is the main component of the Earth's inner core?

Back

Iron and nickel.

Front

What is the temperature range of the Earth's inner core?

Back

Approximately 4,000 to 5,000 degrees Celsius.

Front

What is the role of the outer core?

Back

It generates Earth's magnetic field.

Front

What is the lithosphere?

Back

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