Soil and Earth Quiz

What is horizon O?

• Topsoil

• Subsoil

• Organic matter

• Bedrock

What is the practice of rotating use of different fields from crop to crop each year, to avoid exhausting the soil?

• Crop rotation

• Erosion

• Fertile soil

• Weathering

What is the largest soil particle?

• Rock

• Sand

• Clay

• Water

What is the process of breaking down rocks into smaller pieces?

• Erosion

• Weathering

• Decomposition

• Compaction

What is horizon B commonly known as?

• Topsoil

• Subsoil

• Organic matter

• Bedrock

What is the smallest soil particle?

• Sand

• Silt

• Clay

• Gravel

What is the process of soil losing its fertility due to continuous cultivation?

• Soil erosion

• Soil degradation

• Soil compaction

• Soil weathering

What is the layer of soil that is rich in minerals and nutrients?

• Horizon A

• Horizon B

• Horizon C

• Horizon D

What is the process of water carrying away the top layer of soil?

• Soil erosion

• Soil degradation

• Soil compaction

• Soil weathering