Restless Earth Flashcards
The Earths layers from outside to inside
Lithosphere
Mantle
Core
What makes up the lithosphere?
Continental crust and oceanic crust
Explain how tectonic plates move
Heat rises from the core due to radioactive decay
It cools and spreads, making the plates move
They then sink back
How are constructive margins formed?
Magma rising and splitting up continental crust and forming new oceans
Explain subduction
Two plates collide and the denser oceanic plate sinks beneath the continental
Composite volcanoes
Alternate layers of lava and ash
Viscous lava - flows slowly
Steep sided
Violent
Shield volcanoes
Gentle slopes
Fluid - flows quickly
Basaltic lava
What are primary impacts?
The immediate effects
What are secondary impacts?
The impact after the earthquake has finished
How to prepare for earthquakes
Emergency plans
Well-trained and funded emergency services
Warning systems
Evacuation routes
