A(n) ________ is a period when a supercontinent rifts into fragments, spreads apart, and the fragments reassemble into a new supercontinent.
A) convection cycle
B) supercontinent cycle
C) suturing cycle
D) orogenic cycle
Question 2
Because of the original molten state of Earth, it is likely that the first crust was ________ in composition.
A) ultramafic
B) mafic
C) intermediate
D) felsic