Techtonics Flashcards
What is the structure of the earth
Why do tectonic plates move
Centre of the earth solid iron and Nickel called core
Around the core-mantle- semi molten rock that moves slowly
Outer layer-crust
Techtonic plates move because of convection currents which form because the mantle next to the core gets hotter and the heat rises up to the crust causing the molten rock to move slowly , when it gets to the crust it cools down again so goes back down
What is an ocean trench
Deep sections of the ocean floor where the oceanic plate goes down
What is an example of a constructive, destructive and conservative boundary
Constructive- mid Atlantic ridge
Conservative-st Andreas fault
Destructive-mt st Helens
What are characteristics of a fold mountain
Very high mountains with glaciers on top
Rocky with steep slopes
Lakes in the valleys between the mountains
How are fold mountains formed
Sediment builds up on the sea bed between two tectonic plates, turns into sedimentary rock, when plates meet rock gets crumpled and folded upwards to form fold mountains
How have people adapted to the conditions in the alps
Farmers make terraces on the steep slopes as crops cant grow on the slopes
Goats are farmed on the slopes because they are well adapted to steep slopes
What is uplift
What is the anticline and syncline
The process that creates fold mountains where sediment is pushed upwards by 2 continental plates moving together by convection currents
Anticline-rock folded upwards-old
Syncline -rock folded downwards-new
