EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Steady advancement in technology has allowed geologists to better understand plate tectonics.
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The mantle is made up of elements like oxygen, silicon, and magnesium.
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Geologists mapped the ocean floor and discovered the mid-oceanic ridge.
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Divergent boundaries in the ocean create a chain reaction that pulls plates apart on land.
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Detailed explanation-1: -Crustal movements in one location can affect locations far away. What evidence from the text supports this conclusion? Geologists mapped the ocean floor and discovered the mid-oceanic ridge. Crustal movements create convergent, divergent, and transform boundaries.
Detailed explanation-2: -Sheared-up mountain ridges and valleys form in a narrow zone where one plate slides past another at a transform plate boundary. And a mountain chain of volcanoes forms where a plate rides over a hotspot; the volcanoes get older and lower as the plate moves them away from the hotspot.
Detailed explanation-3: -Evidence for the theory of plate tectonics is continental drift, appearance of younger crustal layers in the ocean, earthquakes along plate boundaries called fault lines, the presence of similar fossils and rocks on separate continents, and the matching shapes of continents that once fit together as a larger continent.
Detailed explanation-4: -Earthquakes occur along fault lines, cracks in Earth’s crust where tectonic plates meet. They occur where plates are subducting, spreading, slipping, or colliding. As the plates grind together, they get stuck and pressure builds up. Finally, the pressure between the plates is so great that they break loose.