geography- Dangerous Planet

geography- Dangerous Planet

1. Eathquakes

   • How are earthquakes formed?
     • Earthquakes are usually formed when rock underground suddenly breakd along the fault
   • Preparing for an earthquake.
     • Put shutters on your windows
     • have an escape plan
     • practise hiding under tables
     • practise stop drop hold on
     • Cities can be evacuated

2. Volcaones

   • Shield Volcanoes
     • shield volcanoes have non vicous lava (non sticky)
       • Due to this these volcanoes erput more often.
         • this put the enviorement and people in less danger
     • Shield Volcanoes have constructive plate margins.
     • these volcanoes are short with a wide base
     • this lava is called basaltic lava
   • Composite Volcanoes
     • Composite volcanoes have vicous lava (sticky)
       • Due to this these volcanoes dont erput as often.
         • This puts the enviorement and people in danger.
           • This is due to it giving out things like pyroclastic flows and ash.
     • Composite Volcanoes have destructive plate margins.
     • these volcanoes are tall with narrow bases
     • the lava is called andestic lava
   • How are Volcanoes formed?
     • volcanoes are formed when magma from the earths works its way to the surface. At the surface it erputs to form lava flow and ash.

3. plate boundary movements

   • Destructive plate boundaries
     • The oceanic and the continental plates push together. this causes the oceanic plate to sink as its heavier
       • this then sinks into the mantle which causes magma.
   • Collision plate boundaries
     • The continental plates move towards eachother causing pressure.
       • this heats up the mountain which will then cause the mountain to fold.
   • Construction plate boundaries
     • The oceanic plates move apart causing a gap to form.
       • This will then fill up with magma creating a volcano.
   • Conservation plate boundaries
     • two plates slide past eachother causing friction and tention
       • the rock breaks, the ground shakes, and an earthquake is formed.