EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cooler, denser crust sinks into the mantle
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when edges become denser and gravity pulls them downward and away from one another
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currents just beneath Earth’s crust flow very slowly, causing movement in the plates above them
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folding and crumpling and sliding upward creating mountains
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Detailed explanation-1: -Ridge Push. Gravitational force that causes a plate to move away from the crest of an ocean ridge, and into a subduction zone. It works together with Slab Pull, but is much less significant.
Detailed explanation-2: -plate tectonics (the Mid-Atlantic Ridge), known as ridge push, in the Atlantic Ocean. This push is caused by gravitational force, and it exists because the ridge occurs at a higher elevation than the rest of the ocean floor. As rocks near the ridge cool, they become denser, and gravity pulls them away…
Detailed explanation-3: -Ridge push –magma rises as the plates move apart. The magma cools to form new plate material. As it cools It becomes denser and slides down away from the ridge. This causes other plates to move away from each other.
Detailed explanation-4: -’Ridge Push’ and ‘Slab Pull’ are thought to be the major forces driving the motion of oceanic plates. Ridge push is caused by the potential energy gradient from the high topography of the ridges. Slab pull is caused by the negative buoyancy of the subducting plate.