Plate tectonics
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Plate tectonics. LAYERS OF THE EARTH. There are 5 layers of the Earth: CRUST MOHO - Mohorovičić discontinuity MANTLE OUTER CORE INNER CORE . TWO CRUST TYPES. There are two different types of crust.

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Layers of the earth
LAYERS OF THE EARTH

  • There are 5 layers of the Earth:

  • CRUST

  • MOHO - Mohorovičić discontinuity

  • MANTLE

  • OUTER CORE

  • INNER CORE


Two crust types
TWO CRUST TYPES

  • There are two different types of crust.

  • Continental crust which is what the continents are and what they are moving on. The crust is made of rock - Granite

  • Oceanic Crust which is what is below the oceans, the oceans are on top of the oceanic crust. The crust is made of rock - Basalt


Two crust types1
TWO CRUST TYPES

  • Continental crust is thicker and oceanic crust BUT oceanic crust is denser than continental crust.


Why they move
WHY THEY MOVE

  • The Earth’s plates move because of convection currents in the mantle.



What they are1
WHAT THEY ARE

  • The plates are made up of the oceanic and continental crust on the planet.

  • The plates are broken into different sizes and shapes.

  • The plates move around the planet because of convection currents in the mantle


How the move
HOW THE MOVE

  • The plates move in three major directions with variations in each type. The directions are:

  • Convergent

  • Divergent

  • Transform


Convergent
CONVERGENT

  • Convergent means come together or converge in one spot.

  • The plates are moving towards each other until they meet.


Types of convergent
TYPES OF CONVERGENT

  • Oceanic vs Oceanic – you get underwater mountains

  • Continental vs Continental you get mountains

  • Oceanic vs Continental – SUBDUCTION!


Convergent subduction
CONVERGENT-SUBDUCTION

  • Subduction – the Oceanic plate goes below the continental plate due to the density of the Oceanic plate

  • Mountains

  • Volcano


Divergent
DIVERGENT

  • NOT THE BOOK/MOVIE!!

  • The plates are moving away from each other.


Divergent1
Divergent

  • Two types of divergent plates

  • Oceanic vs oceanic – sea floor spreading and mid ocean ridges .

  • Continental vs continental - rift valleys


Transform
TRANSFORM

  • Two plates rub against each other.



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