Soil Genesis and Classification Quiz

What is soil composed of?

• Mineral and organic materials, living forms, and air

• Only water

• Only organic materials

• Only minerals

What is geology the study of?

• The hydrosphere

• The earth's crust and formation of rocks

• The atmosphere

• The biosphere

Which phase is NOT a part of soil?

• Liquid phase

• Solid phase

• Gaseous phase

• Plasma phase

What type of rocks are formed from cooling magma?

• Sedimentary rocks

• Metamorphic rocks

• Igneous rocks

• Organic rocks

Which of the following is an example of sedimentary rock?

• Limestone

• Basalt

• Granite

• Gneiss

What is the process of breaking down rocks called?

• Erosion

• Weathering

• Compaction

• Sedimentation

Which mineral is a primary mineral found in soils?

• Quartz

• Clay

• Calcite

• Gypsum

What is humus?

• A soil layer

• A mineral

• Decomposed organic matter

• A type of rock

Which factor does NOT influence soil formation?

• Time

• Climate

• Topography

• Color

What is the top layer of soil called?

• A Horizon

• C Horizon

• B Horizon

• O Horizon