What is the name of the solid, but malleable layer beneath the crust, and what is it primarily composed of?

The mantle, composed primarily of peridotite.

Describe the process of convection within the mantle and its effect on Earth's surface.

The mantle convects due to heat transfer, causing mid-ocean ridges and rift zones at upwelling areas and subduction zones at sinking areas.

8th Grade•45 minutes

I can describe the characteristics of Earth's layers.

The Earth's crust is divided into two types: continental crust, which is felsic and thick, and oceanic crust, which is mafic and thin.

The mantle is a solid but malleable layer mainly composed of peridotite, and it convects, transferring heat to the surface.

Earth's magnetic field is generated by the geodynamo in the liquid outer core, and the solid inner core helps stabilize this field.

This lesson includes 7 practice questions to reinforce learning.

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1. What are the two types of crust that make up Earth's outermost layer?

2. Describe the composition and relative density of continental crust compared to oceanic crust.

3. Explain the process of subduction and why it occurs.

...and 4 more questions

An Overview of Earth’s Layers

Professor Dave Explains