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Plate Tectonics

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  • What is the earths crust made up of
    Solid Rock
  • Give an example of a mountain range formed by a destructive plate boundary
    Andes mountains
  • What happens at a destructive plate boundary?ntle
    An oceanic plate collides with a continental plate and is forced under (subduction), creating earthquakes and volcanoes.
  • What happens at a passive plate boundary
    Plates slide past each other, energy builds up and causes earthquake activity
  • What is a fault line
    a crack in the earths curst where two tectonic plates meet/ move past each other
  • What are Tectonic plates
    Large pieces of the Earth’s crust that float on the semi-molten mantle.
  • Give one landform that forms at a constructive plate boundary.
    volcanoes
  • What was the name of the supercontinent that once existed?
    Pangaea
  • Explain what happens at a constructive plate boundary.
    Plates separate, magma rises to create new crust
  • Name the four main layers of the Earth.
    Crust, mantle, inner core, outer core
  • What is the semi-molten layer of the Earth called where convection currents occur?
    Mantle
  • What is a passive plate boundary
    Plates slide past each other; earthquakes often occur.
  • Which tectonic plate is Ireland located on
    Eurasian plate
  • What is the Core made up of
    Liquid iron and nickel
  • Where is the San Andreas Fault located
    California
  • Explain what convection currents in the mantle do.
    Heat causes molten rock to move in circular patterns, which moves tectonic plates.
  • Who first proposed the theory of continental drift?
    Alfred Wegener