Geog

• What is plate tectonics theory

  • It is a three-layered structure
  • Lithosphere is broken into tectonic plates
  • tectonic plates are constantly moving
• characteristics of internal structure

  Layer. Temp. Thickness. Matter

  core. 4400- 3300km. solid

  6000

  heats up

  mantle. 1000- 2900km. semi-

  3700. solid

  (non-

  neutonium fluid like oobleck)

  crust Lowest 6 to 70 km. solid
• Types of Tectonic plates

  • oceanic
  • continental

  location?

  • oceanic- beneath deep oceans
  • continental-beneath land masses and shallow seas

  Thickness?

  • oceanic- Thin
  • continental-Thick

  Density?

  • oceanic-denser
  • continental-less dense
• Type of movements?

  divergent

  convergen

  transition
• what is divergent

  move away
• what is convergent?

  move towards
• What is transition?

  slide past
• Movement of plates

  The mantle material gets heated by the core. The mantle material then expands, rises and spread out beneath the crust. Plates are dragged along and move away from one another. Causing divergent plate movement. The mantle material cools and sinks, pulling the rest of the plate along. Forming a convection current.

  
• What is slab pull force

  When two plates converge, the denser oceanic crust is pulled down by gravity as it subducts beneath the less dense crust. Continuous downward-movement results in gravity dragging the rest of the plate along.Slab pull force now drives downward , moving portion of convection currents. This is convergent plate boundary.

  
• Volcanoes

  • Formed as the oceanic Indo-Australian plate and continental Eurasian plate move towards each other at the convergent plate boundary at b
  • Volcanoes Can be found along convergent plate boundaries as the subducted plate causes solid mantle material to melt and magma is formed
  • Magma rises through the mantle layer as it is light, and erupts through the fractures in the crust
  • As the magma cools and solidifies and forms layers of rock, over time it will build up to form volcanoes on the continental crust along the plate boundary
• Volcanoes


  • Formed as the oceanic Indo-Australian plate and continental Eurasian plate move towards each other at the convergent plate boundary
  • Can be found along convergent plate boundaries
• Formation of volcanoes

  1. Subducted plate causes solid mantle material to melt and magma is formed

  2. Magma rises through the mantle layer as it is light, and erupts through the fractures in the crust

  3. Magma cools and solidifies and forms layers of rock, over time it will build up to form volcanoes on the continental crust along the plate boundary