Layers of Soil

Front

What is the top layer of soil called?

Back

Topsoil is the top layer of soil that contains the most nutrients and humus.

Front

What is humus?

Back

Humus is the decayed remains of plants and animals that enrich the soil.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Front

Which layer of soil is below the topsoil?

Back

The layer below the topsoil is called subsoil.

Front

What is bedrock?

Back

Bedrock is the solid rock layer that is found beneath the soil.

Front

What process breaks down rocks into soil?

Back

The process that breaks down rocks into soil is called weathering.

Tags

NGSS.MS-ESS2-2

Front

What is the main purpose of topsoil?

Back

Topsoil provides nutrients for plants and is essential for growing crops.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Front

What does subsoil contain?

Back

Subsoil contains minerals and nutrients but less organic matter than topsoil.

Tags

NGSS.MS-LS2-1

Front

How does humus benefit the soil?

Back

Humus improves soil structure, retains moisture, and provides nutrients for plants.

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from one location and transported to another.

Tags

NGSS.MS-ESS2-2

Front

What is the difference between soil and dirt?

Back

Soil is a natural resource that supports plant life, while dirt is displaced soil that is not supporting life.