EARTH SCIENCE
TECTONICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
cooler, denser crust sinks (is pulled) into the mantle
|
|
|
when edges become denser and gravity pulls them downward and away from one another
|
|
|
currents just beneath Earth’s crust flow very slowly, causing movement in the plates above them
|
|
|
folding and crumpling and sliding upward creating mountains
|
Detailed explanation-1: -What is Slab Pull? Slab pull is the pulling force exerted by a cold, dense oceanic plate plunging into the mantle due to its own weight. The theory is that because the oceanic plate is denser than the hotter mantle beneath it, this contrast in density causes the plate to sink into the mantle.
Detailed explanation-2: -Slab pull is a geophysical mechanism whereby the cooling and subsequent densifying of a subducting tectonic plate produces a downward force along the rest of the plate.
Detailed explanation-3: -Subduction is the tectonic process at convergent margins by which slabs of oceanic lithosphere descend into the mantle.
Detailed explanation-4: -Subduction happens where tectonic plates crash into each other instead of spreading apart. At subduction zones, the edge of the denser plate subducts, or slides, beneath the less-dense one. The denser lithospheric material then melts back into the Earth’s mantle.
Detailed explanation-5: -As a crustal plate moves further from an oceanic ridge, it cools and becomes increasingly dense. This causes it to sink beneath the continental crust in a subduction zone. The weight of this sinking, cooling plate causes a major pulling action, which causes the rest of the plate to be pulled downwards as well.