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Geology
Plate tectonics
Question | Answer |
---|---|
Lithosphere | The thinnest layer of the earth |
Plates | Giant chunks of lithosphere |
Asthenosphere | The layer of earth under the lithosphere |
Continental drift | The continents moving around the world |
Pangea | Super continent |
Oceanic ridge system | Continuous submarine mountain chains |
Sea floor spreading | The ocean is being pushed out to the edges |
Subduction | A plate going under |
Convergent boundaries | Subduction zones |
Divergent boundaries | Ridges |
Transform fault boundaries | Plates sliding past each other |
Mid ocean ridge | A place where new crust is formed |
Trenches | A place where old crust is destroyed |
Spreading center | Two plates move away from each other and leave a deep crack |
Rift valleys | A linear shaped lowland between several highlands or mountain ranges created by the action of geological rift or fault |
Deep ocean trenches | Trenches in the ocean that ads very deep |
Volcanic island arc | Volcanoes that form an islands chain and are caused by hot spots. |
Constructive forces | Processes that help build up the earth |
Destructive forces | Processes that destroy and break down the earth |