The following picture is a gravity map of the United States.What do the dark gray regions mean in terms of the density of the material below?
A)high-density rock
B)low-density rock
C)rock of high magnetization
D)rock of low magnetization

Question

The following picture is a gravity map of the United States.What do the dark gray regions mean in terms of the density of the material below? 
A)high-density rock 
B)low-density rock 
C)rock of high magnetization 
D)rock of low magnetization

Quizplus · Accepted Answer

The dark gray regions on the gravity map indicate areas of high gravity anomalies, which are caused by variations in the density of the material below the Earth's surface. Areas with high anomalies have denser material below the surface, such as high-density rock, while areas with low anomalies have less dense material, such as low-density rock. Therefore, the best choice for the dark gray regions is high-density rock.

The Following Picture Is a Gravity Map of the United