Soil Layers on Earth

Is a mixture of minerals, organic matter, and living organisms.

• gas

• soil

• water

• surface

Tags

NGSS.MS-LS2-3

Refers to the top layer of soil made up of undecayed plant and animal material.

• top soil

• humus

• organic layer

• bedrock

Is the geologic material from which soil horizons form.

• organic layer

• topsoil

• bedrock

• parent material

Tags

NGSS.MS-ESS2-1

Is the layer of soil below topsoil where minerals accumulate and support plant growth.

• subsoil

• organic layer

• parent material

• bedrock

Is a deposit of solid rock that is typically buried beneath soil and other broken or unconsolidated material.

• subsoil

• topsoil

• bedrock

• organic layer

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