Hard and rigid, the earths outermost and thinnest layer. It is only a few miles thick under the oceans and averages 20 miles thick under the continents.

A layer of the earths crust under the 7 continents. It is about 20-40 miles thick and very old.

The type of crust lying under the oceans of the world. It is only 4-6 miles thick and very old

This dense layer of the earth is made of hot,semisolid rock and is located directly below the crust. 1,800 miles thick.

Made up of the crust and a tiny bit of the upper mantle, this zone is divided into several constantly moving plates of solid rock that hold the continents and oceans.

A hot, malleable semi-liquid zone in the upper mantle, directly underneath lithosphere, on which the plates of the lithosphere move. convection currents run through this layer.

This layer of the Earth lies between the mantle and the solid inner core. It is the only liquid layer, a sea of mostly iron and nickle about 1,400 miles thick.

The inner most layer of the Earth, and extremely hot, solid sphere of mostly iron and nickle. The inner core is 3,200 to 3,960 miles below the surface and about 750 miles thick.

Greek word for "all the Earth" The name given to the supercontinent that existed more than 225 million years ago, in which the present day continents were joined together in one large landmass. Scientist credited with idea: ALFRED WEGENER

Plate Tectonics Theory

This widely accepted theory states that several large slabs of the lithosphere that hold the continents and oceans and are slowly but constantly moving around the Earth. This theory helps explain how and why earthquakes, volcanoes, and other geologic eve

The border between two tectonic plates.

The boundary that occurs where two plates are pushing toward each other.

The place where a collision between two continental plates crunches and folds the rocks at the boundary, lifting them up and leading to mountain formation.

The place where one plate is getting bent and pulled under the edge of another plate.

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Tectonic Plates

Layers Of The Earth,Plate Tectonics, and Geologic Forces

Question	Answer
Crust	Hard and rigid, the earths outermost and thinnest layer. It is only a few miles thick under the oceans and averages 20 miles thick under the continents.
Continental Crust	A layer of the earths crust under the 7 continents. It is about 20-40 miles thick and very old.
Oceanic crust	The type of crust lying under the oceans of the world. It is only 4-6 miles thick and very old
Mantle (convecting)	This dense layer of the earth is made of hot,semisolid rock and is located directly below the crust. 1,800 miles thick.
Lithosphere	Made up of the crust and a tiny bit of the upper mantle, this zone is divided into several constantly moving plates of solid rock that hold the continents and oceans.
Asthenosphere	A hot, malleable semi-liquid zone in the upper mantle, directly underneath lithosphere, on which the plates of the lithosphere move. convection currents run through this layer.
Outer Core	This layer of the Earth lies between the mantle and the solid inner core. It is the only liquid layer, a sea of mostly iron and nickle about 1,400 miles thick.
Inner Core	The inner most layer of the Earth, and extremely hot, solid sphere of mostly iron and nickle. The inner core is 3,200 to 3,960 miles below the surface and about 750 miles thick.
Pangea	Greek word for "all the Earth" The name given to the supercontinent that existed more than 225 million years ago, in which the present day continents were joined together in one large landmass. Scientist credited with idea: ALFRED WEGENER
Plate Tectonics Theory	This widely accepted theory states that several large slabs of the lithosphere that hold the continents and oceans and are slowly but constantly moving around the Earth. This theory helps explain how and why earthquakes, volcanoes, and other geologic eve
Boundary	The border between two tectonic plates.
Convergent Boundary	The boundary that occurs where two plates are pushing toward each other.
Collision Zone	The place where a collision between two continental plates crunches and folds the rocks at the boundary, lifting them up and leading to mountain formation.
Subduction Zone	The place where one plate is getting bent and pulled under the edge of another plate.

Created by: kichelle

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