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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.