Soil Layers/Soil Horizons Review

Front

What is the layer beneath all other soil layers?

Back

Horizon R (Bedrock)

Tags

NGSS.MS-ESS1-4

Front

What is humus?

Back

Organic matter that is formed from decaying leaves, twigs, and animal remains.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Front

Which horizon contains partially weathered rock?

Back

C Horizon

Front

What are soil layers called?

Back

Horizons

Front

What is the O Horizon made of?

Back

Decaying leaves, twigs, and animal remains/wastes.

Tags

NGSS.MS-LS2-3

Front

What is the top layer of soil that is rich in nutrients?

Back

A Horizon (Topsoil)

Front

What is the layer that is often referred to as subsoil?

Back

B Horizon

Front

What is the main component of soil?

Back

Minerals, organic matter, water, and air.

Front

What is the process of soil formation called?

Back

Soil development or pedogenesis.

Front

What is the difference between soil and dirt?

Back

Soil is a living ecosystem, while dirt is just displaced soil.