The three categories of rocks are classified by ____.
A) geographic location
B) color
C) mineral content
D) method of formation
E) time of formation

Question

Quizplus · Accepted Answer

The three categories of rocks are classified by method of formation. The three categories are igneous rocks (formed from the cooling of magma or lava), sedimentary rocks (formed from sediment deposition and compression), and metamorphic rocks (formed from existing rock that has been altered by heat and pressure). Geographical location, color, mineral content, and time of formation may be used to further classify rocks within these categories, but the primary classification is based on method of formation.

The Three Categories of Rocks Are Classified by ____