Describe the earth's crust, mantle, outer core, inner core.
crust- 6-80km thick, mantle- 3000ºC and 2000km thick, outer core- nickel, iron and molten liquid, 3500km thick, inner core- solid, 1200km thick
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Describe plate movements at a destructive plate margin.
At a destructive plate margin one plate slides beneath another as they collide, a process known as subduction. the bottom plate crumples creating new mountains.
2 of 10
Describe the plate movements at a constructive plate margin.
At a constructive plate margin the plates are moving apart. Molten rocks from the mantle below spread out and harden forming a ridge of new rock.
3 of 10
Describe the plate movements at a conservative plate margin.
At a conservative plate margin the plates slide past each other. pressure builds up until they jerk causing earthquakes..
4 of 10
describe the plate movements at a collision plate margin.
A collision plate margin is where two plates collide and are crushed against each other. they are pushed upwards, forming new mountains.
5 of 10
Give two differences between the oceanic and continental plates.
1. the oceanic plates are younger than the continental plates 2. the oceanic plates are being renewed and destroyed at the zones of construction and destruction. The continental plates cannot be renewed or destroyed.
6 of 10
Describe the formation of oceanic trenches.
Deep oceanic trenches are formed offshore at destructive plate margins(subduction zones) where the denser oceanic plate dives beneath the less dense continental plate. These are the deepest parts of the ocean such as Peru-Chile trench.
7 of 10
Describe the formation of fold mountains.
When tectonic plates collide, huge forces cause the rocks to be folded and buckled, forming mountains like the Andes in the south America (a subduction zone at a destructive plate margin) and the Himalayas in Asia (a collision zone).
8 of 10
what is an upfold?
an anticline
9 of 10
what is a downfold?
a syncline
10 of 10
Other cards in this set
Card 2
Front
Describe plate movements at a destructive plate margin.
Back
At a destructive plate margin one plate slides beneath another as they collide, a process known as subduction. the bottom plate crumples creating new mountains.
Card 3
Front
Describe the plate movements at a constructive plate margin.
Back
Card 4
Front
Describe the plate movements at a conservative plate margin.
Back
Card 5
Front
describe the plate movements at a collision plate margin.
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