Answer :
Final answer:
The transition between the Earth's crust and mantle is called the Mohorovičić Discontinuity or Moho. It generally occurs 30-40 km below the continents, but can range from 25-60 km in areas impacted by orogenies. This significant geological boundary reflects a dramatic change in composition and seismic velocity.
Explanation:
Understanding the Transition from Crust to Mantle
Major Childs (Rebecca) mentions making the transition into the mantle, which refers to a significant geological boundary known as the Mohorovičić Discontinuity, or Moho for short. Discovered by Andrija Mohorovičić in 1909, this boundary marks the transition between the Earth's crust and mantle.
The depth of the Moho varies depending on location: beneath oceanic crust, it is typically found about 5 km below the surface, while beneath the continents, it occurs at an average depth of around 30-40 km.
However, in regions experiencing significant mountain-building events, known as orogenies, the Moho can be found at depths of up to 60 km. Therefore, the correct answer to the student's question is that the transition occurs at the Moho and generally lies at depths between 25-60 km beneath the continents.
Learn more about Moho here:
https://brainly.com/question/33456387
