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2:2 Weathering

Soil Formation and Composition

QuestionAnswer
The loose, weathered material on Earth’s surface in which plants can grow. Soil
The solid layer of rock beneath the soil. Bedrock
The dark-colored substance that forms as plant and animal remains decay. Humus
Soil that is made up of about equal parts of clay, sand, and silt. Loam
A layer of soil that differs in color and texture from the layers above or below it. Soil Horizon
Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil. Topsoil
The layer of soil beneath the topsoil that contains mostly clay and other minerals. Subsoil
The loose layer of dead plant leaves and stems on the surface of the soil. Litter
Organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals. Decomposer
Created by: huffakerluk11
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