Question

which of the following is true concerning continental crust?
a. it does not contain radioactive elements.
b. it mostly contains heavier and denser minerals than the mantle.
c. it efficiently transfers heat from the mantle to the surface.
d. none of the above
please select the best answer from the choices provided

Explanation:

• Continental crust contains radioactive elements like uranium and thorium, so option a is false.
• Mantle has denser minerals (e.g., olivine) compared to continental crust (e.g., quartz, feldspar), so option b is false.
• Continental crust is a poor heat conductor compared to mantle - related materials, so option c is false.

Answer:

D. None of the above