Crustal movements of various kinds in the Earth's crust are collectively called ________ activity.
A) 1st order
B) tectonic
C) detrital
D) clastic
E) metamorphic

Question

Quizplus · Accepted Answer

Crustal movements refer to the movement of tectonic plates, so the best choice is B, tectonic activity. A, 1st order, is not a commonly used term in geology. Detrital and clastic are terms used to describe sedimentary rocks, and metamorphic refers to a type of rock formed from pre-existing rock due to heat and pressure.

Crustal Movements of Various Kinds in the Earth's Crust Are