Soil Composition and Formation Concepts

Front

What is soil?

Back

A mixture of sand, silt, clay, rock, and organic material.

Front

Soil is formed when _____ are broken down by living things, weather, and water over long periods of time.

Back

rocks.

Front

Soil is made of:

Back

all of the above (pieces of rock, air and water, matter that was once alive).

Front

Which layer is the parent material?

Back

Horizon C.

Front

Factors that influence soil formation in a region include:

Back

all of the answers are correct (average temperature, amount of rainfall, type of bedrock).

Front

What are the main components of soil?

Back

Sand, silt, clay, rock, and organic matter.

Front

What is organic material in soil?

Back

Matter that was once alive, such as decomposed plants and animals.

Front

What role does weathering play in soil formation?

Back

Weathering breaks down rocks into smaller particles that contribute to soil.

Front

What is the top layer of soil called?

Back

Horizon O (topsoil).

Front

What is the significance of Horizon B in soil?

Back

It is the layer where minerals leach from above and accumulate.