Question

question 17 of 20 :
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1. where is the youngest crust on earth most likely located?

○ a. at divergent boundaries in the middle of the ocean
○ b. at transform boundaries where two plates slide past each other
○ c. at convergent boundaries where two continents meet
○ d. at convergent boundaries where oceans and continents meet
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Explanation:

To determine where the youngest crust is located, we analyze each option:

• Option A: Divergent boundaries (like mid - ocean ridges) are where new oceanic crust is formed as tectonic plates move apart. Magma rises here, cools, and creates new crust, so this is where the youngest crust should be.
• Option B: Transform boundaries involve plates sliding past each other, with no new crust formation or destruction, so no new (young) crust is made here.
• Option C: At convergent boundaries between two continents (continental - continental convergence), one plate is usually subducted or they collide to form mountains. This is a zone of crustal thickening and old crust is being deformed, not new crust formed.
• Option D: At convergent boundaries between oceans and continents (oceanic - continental convergence), the oceanic plate is subducted (destroyed) under the continental plate. This is a zone of crustal destruction, not formation of new young crust.

Answer:

A. At divergent boundaries in the middle of the ocean