Learning Objective

In this lesson we will learn about the four main layers that make up Earth – the crust, mantle, outer core and inner core.

Learning Outcomes

By the end of this lesson you will be able to:

• Identify the main layers making up Earth.

• Describe the structure and composition of Earth’s crust.

• Compare continental crust and oceanic crust.

• Describe the structure and composition of Earth’s mantle.

• Differentiate between the upper mantle, asthenosphere and mesosphere.

• Describe the structure and composition of Earth’s outer core.

• Describe the structure and composition of Earth’s inner core.

• Describe the lithosphere and explain what tectonic plates are.

(Image: Vadimsadovski, Adobe Stock)