Soil Formation

Front

What is the top layer of soil called that contains primarily humus?

Back

Horizon A

Front

What factors do scientists use to classify soil types?

Back

Climate, plants, soil composition

Front

Which soil particle is the smallest?

Back

Clay

Front

What are the three main types of soil particles?

Back

Clay, sand, silt

Front

What type of soil is an equal mixture of sand, silt, and clay?

Back

Loam

Front

What is humus?

Back

Decomposed organic matter in soil that enriches it.

Front

What is soil composition?

Back

The combination of minerals, organic matter, water, and air in soil.

Front

What role do plants play in soil formation?

Back

Plants contribute organic matter and help prevent erosion.

Front

What is the process of weathering in soil formation?

Back

The breakdown of rocks into smaller particles due to environmental factors.

Front

What is the significance of soil horizons?

Back

Soil horizons are layers that differ in composition and properties.