EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They always include oxygen and silicon.
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They are naturally occurring materials
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They each have unique properties.
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They have a crystalline structure.
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Detailed explanation-1: -The rising heat of convection currents moves the almost-liquid rocks. The pressure of convection bends rocks until they break completely. The pressure of convection bends rocks until they break completely. They always include oxygen and silicon.
Detailed explanation-2: -Convection currents drive the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle. In places where convection currents rise up towards the crust’s surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig. 7.21).
Detailed explanation-3: -Convection currents are identified in Earth’s mantle. Heated mantle material is shown rising from deep inside the mantle, while cooler mantle material sinks, creating a convection current. It is thought that this type of current is responsible for the movements of the plates of Earth’s crust.
Detailed explanation-4: -The layer after the core is the mesosphere. This layer is mostly solid and extends outward another 1, 500 miles. The asthenosphere is a thin layer, about 150 miles thick, at the border between the mantle and the crust.