Plate boundaries

• What are plate boundaries also called?

  Plate margins
• Where do constructive plate boundaries exist?

  Where magma rises in the mantle
• What happens to rising magma at constructive boundaries?

  It cools and creates new crust
• Where are constructive boundaries mostly found?

  At the bottom of the sea
• What type of hazards are found at constructive boundaries?

  Volcanoes and earthquakes
• Why are earthquakes at constructive boundaries usually not powerful?

  Plates are mostly moving apart
• What are destructive plate boundaries also called?

  Convergent boundaries
• What happens at destructive boundaries?

  Tectonic plates are carried towards each other
• What occurs during subduction at destructive boundaries?

  Oceanic plate is forced underneath continental plate
• What is created when oceanic plates sink into the mantle?

  Water vapor and carbon dioxide
• How does pressure build up in the crust at destructive boundaries?

  Like shaking a fizzy drink bottle
• What happens when the pressure in the crust becomes too great?

  Volcanic eruptions occur
• Why do powerful earthquakes occur at destructive boundaries?

  Plates grind against and get stuck on each other
• What is created at collision boundaries?

  Old mountains
• What happens when two continental plates collide?

  They crumple upwards
• Which mountain range was formed by the collision of tectonic plates?

  The Himalayas
• How do mountains form over millions of years?

  Plates grind, crack, and buckle upwards
• What is the difference between collision and subduction boundaries?

  Collision involves two continental plates
• What happens at conservative boundaries?

  Tectonic plates slide past each other
• What occurs when the edges of plates get stuck at conservative boundaries?

  Energy builds up and causes earthquakes
• What is not present at conservative boundaries?

  No magma rising up
• What are the types of plate boundaries and their characteristics?

  • Constructive (divergent): Plates move apart, create new crust, often at sea.
  • Destructive (convergent): Plates collide, can cause subduction, volcanic eruptions, and powerful earthquakes.
  • Collision: Both plates are continental, create mountains, no volcanic activity.
  • Conservative (transform): Plates slide past each other, no creation or destruction, causes earthquakes.
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• Who is the presenter of the video?

  The Mountain Man
• What is the name of the work mentioned in the video?

  The work of Michael Deluxe