Soil and Weathering Concepts

Front

Soil

Back

Provides nutrients for plants; made of rock, humus, clay, silt, and sand.

Front

Weathering

Back

Breakdown of rocks; creates soil.

Front

Topsoil

Back

Upper soil; natural product of subsoil and bedrock; best for plants.

Front

Subsoil

Back

Made up mostly of clay and located under the topsoil.

Front

Bedrock

Back

The solid rock layer beneath the soil layers.

Front

Humus

Back

Decayed matter found in top soil and does not hold water well

Front

Sand

Back

Grains of worn down rock, larger than silt, has few nutrients and does not hold water well

Front

Silt

Back

Very small broken pieces of rock, smaller than sand and larger than clay

Front

Clay

Back

Very small particles, holds water well, and is sticky when wet

Front

Conserve

Back

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