Tectonic plates
- Created by: Ruby0123
- Created on: 03-10-21 13:21
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- Tectonic plates
- destructive
- these are where two plates are moving towards each other
- where an oceanic plate meets a continental plate, the denser oceanic plate is subducted (forced down into the mantle) and destroyed, creating a gas-rich magma
- eg. along the west coast of south america, the oceanic Nazca plate is being subducted underneath the continental South American plate, forming the Atacama Trench
- volcanoes and ocean trenches occur here
- constructive
- constructive margins are where two plates are moving away from each other
- -magma rises from the mantle to fill the gap and cools, creating new crust
- eg. the movement of the Eurasian plate and the North American plate away from one another is forming the Mid-Atlantic ridge
- conservative
- conservative margins are where two plates are moving sideways past each other or are moving in the same direction but at different speeds.
- crust isn't created or destroyed
- collision
- where two continental plates meet, the ground is folded upwards
- creating fold mountains
- where two continental plates meet, the ground is folded upwards
- basics
- the earths crust (its outer layer) is divided into slabs called tectonic plates that float on the mantle (layer of semi-molten rock)
- the earths surface are made up of huge floating slabs/ plates that are constantly moving
- the places where plates meet are called plate boundaries or plate margins
- the earths surface are made up of huge floating slabs/ plates that are constantly moving
- the plates are moving because of convection currents in the mantle
- plates are made out of 2 types of crust
- oceanic
- thinner (5-10km)
- denser
- thinner (5-10km)
- continental
- thicker (30-60km)
- less dense
- thicker (30-60km)
- the earths crust (its outer layer) is divided into slabs called tectonic plates that float on the mantle (layer of semi-molten rock)
- destructive
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