Convection currents, ridge push and slab pull. Flashcards
The Earth has a hard outer layer called the ________.
Crust.
The crust is broken up into large chunks called _________.
Tectonic plates.
These plates move sometimes together against each other, due to things happening in the _________.
Mantle.
This is because plates effectively ‘float’ on top of the _______.
Mantle/Magma.
The first thing that happens is the liquid _______ is heated by the earth’s hot ________.
Magma, Core.
This causes _________ ___________ in the mantle, which rise up from the core towards the _________.
Convection currents, crust.
As it reaches the _________, it _________ and _________ apart, dragging the __________ with it.
Crust, cools, spreads, crust.
The final outcome of this movement is the formation of _________ and ___________ and ___________ on the surface of the earth.
Earthquakes, volcanoes , mountains.
Another way plates move is something called _________ _________. This happens when new ________ forms at _____ ridges, pushing ______ apart.
Ridge push, material, ocean, plates.
Plates also move because of ____ ____, where a denser plate is pulled down into the ______ beneath another plate.
Slab Pull, mantle.
This has caused the __________ to move over millions of years.
Continents.
Slab pull is also known as __________.
Subduction.
The 2 types of crust are the _______ crust and the ___________ crust.
Oceanic, Continental.
The layers in order of closest to us are:
-_____
-______
-_____ ____
-_____ ____
Crust, Mantle, Outer core, Inner core
A large area of land usually surrounded by water.
Continent.
A prehistoric land animal that lived in what is now South America and southern Africa.
Mesosaurus.
Circular movement in the mantle caused by heat that helps movement of the plates across the Earth’s surface.
Convection Currents.
A place on the Earth’s crust where hot magma from inside the mantle can escape.
Volcano.
The slow movement of the continents across the surface of the Earth.
Continental Drift.
Huge sections of the Earth’s crust that can move with the flow of the mantle underneath.
Tectonic plates.
Name given to the whole process that explains continental drift.
Tectonic Theory.
The centre of our planet, made of heavy metals and as hot as the surface of the sun.
Core.
