The two most common elements found in Earth's crust are: a. ...

[sam.t96]

The two most common elements found in Earth's crust are:
 a. silicon and magnesium.
  b. sodium and carbon.
  c. silicon and aluminum.
  d. silicon and oxygen.
  e. sodium and potassium.

Question 2

The Mohorovicic discontinuity:
 a. marks the boundary between Earth's crust and mantle.
  b. has been reached by drilling in the Gulf of Mexico.
  c. separates Earth's inner core from the outer core.
  d. indicates a change in rock type from basalt to granite.
  e. indicates a change in rock type from igneous to sedimentary.

[CharlieArnold]

Answer to Question 1

D

Answer to Question 2

A

[sam.t96]

Great answer, keep it coming

[komodo7]

Thanks for the timely response, appreciate it