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Earth's Layers Flashcards

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Questions and Answers

What are the four layers of the Earth?

Crust, mantle, core

Mantle, crust, atmosphere

Crust, mantle, outer core, inner core (correct)

Outer core, inner core

What is the thickest layer?

Mantle

What is the thinnest layer?

Crust

How do we know what the inside of the Earth is like?

We use seismic waves to find out. Signup and view all the answers

What order are the layers in?

Crust, mantle, outer core, inner core Signup and view all the answers

Is the mantle liquid?

False Signup and view all the answers

What layer(s) are made up of iron and nickel?

Inner core and outer core Signup and view all the answers

What are the three layers of the mantle?

Lithosphere, asthenosphere, lower mantle Signup and view all the answers

What layer(s) are liquid?

Outer core Signup and view all the answers

What layer(s) are solid?

Crust, mantle, inner core Signup and view all the answers

What layer is granite in?

Crust Signup and view all the answers

What is thicker, oceanic crust or continental crust?

Continental crust Signup and view all the answers

Where is basalt mostly found?

The crust Signup and view all the answers

What are the three types of heat transfer?

Convection, radiation, conduction Signup and view all the answers

What layer does convection happen in?

Mantle Signup and view all the answers

What type of heat transfer happens in a liquid?

Convection Signup and view all the answers

What type of heat transfer happens by touch?

Conduction Signup and view all the answers

What type of heat transfer happens through air?

Radiation Signup and view all the answers

Why does convection happen?

It happens because of density. The hotter water is less dense than the cold water. Then the cold water gets heated up as it sinks. But the hot water gets cooled off when it rises. Signup and view all the answers

Study Notes

Earth's Layers

Four main layers: crust, mantle, outer core, and inner core.
Crust is the thinnest layer, while the mantle is the thickest.

Mantle Characteristics

The mantle is solid, not liquid.
It consists of three sub-layers: lithosphere, asthenosphere, and lower mantle.

Core Composition

Both the inner core and outer core are composed of iron and nickel.
The outer core is the only liquid layer within the Earth's structure.

Crust Composition

The crust contains granite, predominantly found in the continental crust.
Basalt is primarily located in the oceanic crust.
Continental crust is thicker than oceanic crust.

Heat Transfer Mechanics

Seismic waves help determine Earth's internal structure.
Three primary methods of heat transfer: convection, conduction, and radiation.
Convection occurs in the mantle and involves the movement of liquid; denser, cooler substances sink while less dense, warmer substances rise.
Conduction occurs through direct contact or touch.
Radiation occurs through air or empty space, transferring heat without direct contact.

Convection Dynamics

Convection drives the movement of materials due to differences in density, particularly affected by temperature variations.

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Description

Explore the four layers of the Earth through interactive flashcards. Learn about the crust, mantle, outer core, and inner core, along with their characteristics and how we understand them through seismic waves. Perfect for students studying geology or Earth science.