soil review

topmost layer of soil. It contains living material, plants, and decaying leaves. This layer is thin and very dark in color.

• Humus

• Topsoil

• Subsoil

• Parent Material

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Made mostly of minerals, and plant roots. This layer is dark in color due to the amount of decaying plant and animal matter.

• Humus

• Topsoil

• Subsoil

• Parent Material

Made of sand, silt, and clay. May contain longer roots. It is lighter in color (reddish brown).

• Humus

• Topsoil

• Subsoil

• Parent Material

Tags

NGSS.MS-LS2-3

Rock that has been slightly weathered. Not many living things. (yellowish brown).

• Humus

• Topsoil

• Subsoil

• Parent Material

The lowest layer of soil. It is a solid layer of rock beneath the soil.

• Subsoil

• Bedrock

• Subsoil

• Parent Material

any substance that is made of living things or the remains of living things

• minerals

• organic matter

All the vertical layers or horizons that make up a soil in a particular place

• soil horizons

• soil profile

The layer of soil that differs in color and texture from the layers above or below it.

• soil profile

• soil horizons

Soil is formed 

• very quickly
• after a few weeks
• over thousands of years
• by magic

In what part of the soil profile is the organic material found in?

• C horizon, deepest layer of soil

• B horizon, material washed down from above

• A horizon, upper layer of soil

• layer of dead leaves on the surface of the ground.

Tags

NGSS.MS-LS2-3