Seafloor spreading

• What is the process called that occurs at a constructive plate boundary where two oceanic plates move away from each other?


  Seafloor spreading
• What causes oceanic plates to move apart during seafloor spreading?


  Convection currents in the mantle
• What happens to the plate boundary as the oceanic plates move apart?


  The plate boundary gets wider
• Where does hot magma rise during seafloor spreading?


  Through underwater volcanoes along the ocean ridge
• What occurs when lava on the seabed cools due to the cold ocean water above?


  It hardens and forms new young oceanic crust
• What happens to older oceanic crust as new crust forms at the ocean ridge?


  It is pushed further away towards ocean trenches
• What occurs to the older oceanic crust when it reaches ocean trenches?


  It becomes subducted
• What is the relationship between seafloor spreading and tectonic plate movement?


  • Seafloor spreading causes tectonic plates to move.
  • New oceanic crust forms at the ocean ridge.
  • Older crust is pushed towards ocean trenches and subducted.
• What is the main topic discussed in the material?

  Seafloor spreading and tectonic plate movement
• How do seafloor spreading and tectonic plate movement relate?

  Seafloor spreading causes tectonic plates to move
• What happens when two oceanic plates move away from each other?

  New crust forms at the mid-ocean ridge
• What effect does the widening of the plate boundary have?

  It causes the plates to move apart further
• What is the role of convection currents in tectonic plate movement?

  They drive the movement of tectonic plates
• What geological feature is formed as oceanic plates move apart?

  Mid-ocean ridges
• How does seafloor spreading contribute to the formation of new oceanic crust?

  It creates new crust as magma rises
• What happens to the temperature of the oceanic crust as it moves away from the mid-ocean ridge?

  It cools down as it moves away
• What is the significance of the oceanic ridges in plate tectonics?

  They are sites of new crust formation
• What geological process occurs at oceanic trenches?

  Subduction of one plate beneath another
• How does the cooling of lava contribute to the oceanic crust?

  It solidifies to form new crust
• What geological feature is created when older oceanic crust is pushed down into the mantle?

  Subduction zones
• How does the movement of tectonic plates affect the ocean floor?

  It causes changes in oceanic features
• What is the relationship between seafloor spreading and tectonic plate boundaries?

  Seafloor spreading occurs at divergent boundaries
• What happens to the oceanic crust as it approaches a continental plate?

  It is subducted beneath the continental plate
• How does the process of seafloor spreading influence oceanic trenches?

  It leads to the formation of trenches through subduction
• What is the impact of young oceanic crust on the surrounding environment?

  It influences geological and biological processes
• What is the significance of Gravitational crust in tectonic processes?

  It creates trenches and influences plate movement
• How does the cooling of lava affect the oceanic crust's density?

  It increases density as it solidifies
• What geological feature is associated with the creation of trenches?

  Subduction zones
• How does the movement of tectonic plates contribute to the formation of oceanic trenches?

  It causes one plate to be pushed beneath another
• What are the key processes involved in seafloor spreading?

  • Divergent tectonic plate boundaries
  • Formation of new oceanic crust
  • Movement driven by convection currents
  • Creation of mid-ocean ridges
  • Subduction at oceanic trenches
• What are the effects of tectonic plate movement on the ocean floor?

  • Changes in oceanic features
  • Formation of trenches and ridges
  • Influence on geological and biological processes
  • Creation of new crust and subduction zones