Soil Horizons Types

What is humus?

• Unweathered rock that lies below the lowest layer of soil

• The decayed remains of plants and animals

• The loose material that covers much of Earth's surface

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

How long does it take for soil to form?

• A few days

• A couple months

• Years

Which of these are types of soil?

• Sand, Silt, Clay

• Igneous, metamorphic, sedimentary

• Loam, Bedrock, Topsoil

This soil is a mixture of the other soils.

• Sand

• Loam

• Clay

• Gravel

Which type of soil would be best for growing plants?

• Sand

• Loam

• Clay

• Silt

Tags

NGSS.MS-LS1-5

The top layer of soil is called ______.

• topsoil

• subsoil

• bedrock

The middle layer of soil is called ______.

• topsoil

• subsoil

• bedrock

Tags

NGSS.MS-ESS2-1

Which layer of soil is solid rock?

• topsoil

• subsoil

• bedrock

Soil is made of

• rock particles and minerals

• decayed remains of living things

• air and water
• all of the above

What are layers of soil called?

• soil horizons

• soil profiles

• topsoil

• silt