Question

a scientist uses a special instrument to measure the depth of earth’s crust. he measures one location that is 55 kilometers deep. where is this section of crust most likely located?
○ below a vast ocean
○ below a deep canyon
○ below a mountain range
○ below an island volcano

Explanation:

To determine the location of the 65 - kilometer - deep crust, we use knowledge about Earth's crust types. Oceanic crust is thinner (typically 5 - 10 km) and continental crust is thicker (20 - 70 km or more). A mountain range is part of the continental crust, which can be thick enough to reach 65 km. Oceanic crust (below oceans, island volcanoes) is too thin. Canyons are on the continental surface but don't correspond to such thick crust depth in the same way as mountain ranges.

Answer:

below a mountain range