EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of the oceanic and continental crust.
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The theory that pieces of the lithosphere are in constant motion, driven by convection currents in the mantle.
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A break in Earth’s crust along which rocks move.
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A deep valley that forms where two plates move apart.
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Detailed explanation-1: -A rift valley is a lowland region that forms where Earth’s tectonic plates move apart, or rift. Rift valleys are found both on land and at the bottom of the ocean, where they are created by the process of seafloor spreading.
Detailed explanation-2: -A rift valley is an area where the earth’s crust is splitting apart. As you might guess, a rift is a split or break and a valley is a low point. The rift forms when the earth’s crust divides. The valley that forms in the divide is usually flat, narrow, and has steep sides.
Detailed explanation-3: -The Great Rift Valley is the well known rift valley in the world. It stretches from the Middle East in the north to Mozambique in the south. It is well known for volcanoes, hot springs, geysers, and frequent earthquakes.
Detailed explanation-4: -A rift valley is formed due to the subsidence of the floor of a river valley. On a divergent plate boundary, it is like a crustal expansion or spreading apart of the surface forms a rift valley, which is then further deepened by erosion pressures.
Detailed explanation-5: -When two continental plates diverge, a valleylike rift develops. This rift is a dropped zone where the plates are pulling apart. As the crust widens and thins, valleys form in and around the area, as do volcanoes, which may become increasingly active.