Through geologic time,continents have drifted over the surface of Earth,but each continent has ________.
A)always been about as large as it is today
B)grown by the addition of Precambrian shields
C)grown by addition of crustal fragments
D)grown by crustal stretching

Question

Through geologic time,continents have drifted over the surface of Earth,but each continent has ________. 
A)always been about as large as it is today 
B)grown by the addition of Precambrian shields 
C)grown by addition of crustal fragments 
D)grown by crustal stretching

Quizplus · Accepted Answer

Continents have grown by the addition of crustal fragments over geologic time. Precambrian shields are the oldest and most stable parts of a continent's crust, which have not grown significantly since their formation. Crustal stretching can lead to the formation of new basins or rift valleys, but not necessarily the growth of a continent. Therefore, the best choice is C.

Through Geologic Time,continents Have Drifted Over the Surface of Earth,but