QuestionMay 24, 2025

Which of the following is/are NOT true about subduction zone? It is the area where ocean floor floats over the mantle It is the place where trenches are observed It is the area where oceanic crust is the youngest It is the area where ocean floor rocks are formed

Which of the following is/are NOT true about subduction zone? It is the area where ocean floor floats over the mantle It is the place where trenches are observed It is the area where oceanic crust is the youngest It is the area where ocean floor rocks are formed
Which of the following is/are NOT true about subduction zone?
It is the area where ocean floor floats over the mantle
It is the place where trenches are observed
It is the area where oceanic crust is the youngest
It is the area where ocean floor rocks are formed

Solution
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Answer

The statements that are NOT true are: "It is the area where ocean floor floats over the mantle", "It is the area where oceanic crust is the youngest", "It is the area where ocean floor rocks are formed". Explanation 1. Identify characteristics of subduction zones Subduction zones are areas where one tectonic plate moves under another, typically oceanic crust beneath continental crust. Trenches are observed here, and ocean floor rocks are not formed but rather consumed. 2. Evaluate each statement - "It is the area where ocean floor floats over the mantle": Incorrect, as the ocean floor sinks into the mantle. - "It is the place where trenches are observed": Correct, trenches are common in subduction zones. - "It is the area where oceanic crust is the youngest": Incorrect, oceanic crust is older here due to subduction. - "It is the area where ocean floor rocks are formed": Incorrect, rocks are formed at mid-ocean ridges, not subduction zones.

Explanation

1. Identify characteristics of subduction zones<br /> Subduction zones are areas where one tectonic plate moves under another, typically oceanic crust beneath continental crust. Trenches are observed here, and ocean floor rocks are not formed but rather consumed.<br /><br />2. Evaluate each statement<br /> - "It is the area where ocean floor floats over the mantle": Incorrect, as the ocean floor sinks into the mantle.<br /> - "It is the place where trenches are observed": Correct, trenches are common in subduction zones.<br /> - "It is the area where oceanic crust is the youngest": Incorrect, oceanic crust is older here due to subduction.<br /> - "It is the area where ocean floor rocks are formed": Incorrect, rocks are formed at mid-ocean ridges, not subduction zones.
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