Unit 2 Review | Soil Horizons

Front

What is erosion?

Back

Erosion is the process by which broken down rocks and soil are moved from one place to another by natural forces such as wind, water, ice, or gravity.

Front

How is a delta formed?

Back

A delta is formed by the deposition of sediments carried by a river as it flows into a larger body of water, like an ocean or lake.

Front

What is the top layer of soil called?

Back

The top layer of soil is called Topsoil or A Horizon, which is rich in organic matter and nutrients.

Front

What lies beneath the soil horizons?

Back

Beneath the soil horizons lies the Bedrock, also known as the R Horizon, which is solid rock.

Front

What is the role of gravity in the formation of rivers?

Back

Gravity causes water to flow from higher elevations to lower elevations, forming rivers.

Front

What is weathering?

Back

Weathering is the process of breaking down rocks into smaller pieces through natural forces like wind, water, and temperature changes.

Front

What is organic matter in soil?

Back

Organic matter is decomposed plant and animal material in soil that provides nutrients for plants.

Front

What is the B Horizon in soil?

Back

The B Horizon, also known as Subsoil, is the layer of soil that accumulates minerals and nutrients leached from the upper layers.

Front

What is the C Horizon in soil?

Back

The C Horizon, or Parent Material, consists of weathered rock and minerals from which the soil develops.

Front

What is the O Horizon in soil?

Back

The O Horizon is the organic layer of soil, primarily composed of decomposed leaves and other organic materials.