Earth Science (Mechanism of Plate Movements)
driving force and resisting forces
How huge crustal plates could possibly move are influence by this 2 forces
Collisional resistance
Occurs where a heavy plate is pulled into the mantle but resists subduction because of friction
slab resistance collisional resistance transform fault resistance drag force
Resistance Force include the following: 4
transform fault resistance
Spreading center along a ridge is broken by several kilometers. The plates encounter frictional resistance in the contact zone
Driving Forces
(Blank) either push tectonic plates toward each other or pull them apart
Mantle convection
(Blank) happens when heat in the core rises towards the mantle, increasing its kinetic energy and causing it to expand and spread out beneath the plates. Convection currents drive the plates away from each other and Heat energy dissipates in circular motion because of difference in temperature between the mantle and layer above it
Ridge push
(Blank) happens when lithosphere is pushed up by the asthenosphere because of convection currents from the mantle. Gravity pushes the plate down the ridge and a new crust is formed
Slab suction
(Blank) occurs between two colliding plates, one of which is subducting underneath the other plate, whereby convection currents in the upper mantle suck both plates down
Slab pull
(Blank) takes place when a subducting slab sinks into the hot mantle because of a difference in temperature The rest of the plate to which the slab is attached to is being pulled in as well
Resisting Force
(blank) act against the driving forces of plate tectonics
Drag Force
(blank) resists movement of the lithospheric plates
Mantle convection Slab pull Slab suction Ridge push
4 types of Driving Forces
Continental Drift Theory
A theory that proposes that the plates of the Earth's crust continually move and the speed that they do is infinitesimal
infinitesimal
The speed on which the Earth move is (blank)
Collisional resistance
This force opposes the slab pull
Slab resistance
When plates collide at a plate boundary in a subduction zone, the force will resist movement