EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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 deep valley that forms where two plates move apart.
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A break in Earth’s crust along which rocks move.
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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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Detailed explanation-1: -Answer and Explanation: The upper section of the lithosphere carries the crust of the Earth. The lithosphere is made of two parts: the crust and the upper part of the mantle. The crust is made of both the continental crust, or land, and oceanic crust, or ocean bottom.
Detailed explanation-2: -Heat from deep within Earth is thought to keep the asthenosphere malleable, lubricating the undersides of Earth’s tectonic plates and allowing them to move.
Detailed explanation-3: -The perpetual “slip ‘n’ slide” motion of the lithosphere on the asthenosphere caused it to fragment into several large sections called tectonic plates.
Detailed explanation-4: -Tectonic plates, large slabs of rock that divide Earth’s crust, move constantly to reshape the Earth’s landscape. The system of ideas behind plate tectonics theory suggests that Earth’s outer shell (lithosphere) is divided into several plates that glide over the Earth’s rocky inner layer above the soft core (mantle).