ASBOG ASBOG - Association of State Boards of Geology Geochemistry and Soil Science Questions and Answers

Question 1

Which element is the most abundant by weight in the Earth's crust?

Accepted Answer

Oxygen

Answer

Silicon

Answer

Iron

Answer

Aluminum

Question 2

Eh-pH (Pourbaix) diagrams are used in geochemistry to display the stability fields of what?

Accepted Answer

Minerals and aqueous species

Answer

Rock types and textures

Answer

Soil grain sizes

Answer

Seismic wave velocities

Question 3

Which soil horizon is characterized by the accumulation of illuviated clay, iron oxides, and aluminum?

Accepted Answer

B horizon

Answer

A horizon

Answer

O horizon

Answer

C horizon

Question 4

What does CEC stand for in soil science?

Accepted Answer

Cation Exchange Capacity

Answer

Calcium Exchange Capacity

Answer

Carbon Equivalent Concentration

Answer

Chemical Element Content

Question 5

Acid mine drainage (AMD) is primarily generated by the oxidation of which mineral?

Accepted Answer

Pyrite

Answer

Calcite

Answer

Feldspar

Answer

Quartz

Question 6

In the USDA soil texture triangle, a soil with roughly equal parts sand, silt, and clay is classified as:

Accepted Answer

Loam

Answer

Sandy loam

Answer

Silty clay

Answer

Clay loam