Soil and Rock Flashcards

Front

Humus

Back

Dead plant and animal material in soil that adds nutrients (found in topsoil).

Front

Topsoil (A Horizon)

Back

The uppermost layer of soil, rich in organic material and darker in color.

Front

Subsoil (B Horizon)

Back

The soil layer beneath the topsoil, with fewer organic materials.

Front

C Horizon (Substratum)

Back

A soil layer with partially weathered rock and little organic material.

Front

Bedrock

Back

The solid layer of rock beneath the soil; impermeable to water.

Front

Organic Material

Back

Dead plants and animals that enrich the soil with nutrients.

Front

Weathered Rock

Back

Rocks that have been broken down into smaller pieces by natural forces like wind and water.

Front

Soil

Back

A mixture of weathered rock, humus, air, and water that supports plant life.

Front

Rock Cycle

Back

The continuous process by which rocks are created, changed, destroyed, and formed again.

Front

Sedimentary Rock

Back

A type of rock made when pieces of other rocks are compacted and cemented together; often contains fossils.