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ECS Chapter 2
Vocabulary
| Term | Definition |
|---|---|
| Weathering | The chemical and physical processes that break down rock at Earth's surface. |
| Erosion | The process by which water, ice, wind or gravity moves weathered rock and soil. |
| Mechanical Weathering | The type of weathering in which rock is physically broken into smaller pieces. |
| Abrasion | The grinding away of rock by other rock particles carried in water, ice or wind |
| Ice Wedging | Process that splits rock when water seeps into cracks, then freezes and expands |
| Chemical Weathering | The process that breaks down rock through chemical changes. |
| Permeable | Characteristics of a material that is full of tiny, connected air spaces that water can seep through. |
| Soil | The loose, weathered material on Earth's surface in which plants can grow. |
| Bedrock | The soild layer of rock beneath the soil |
| Humus | Dark-colored organic material in soil |
| Loam | Rich, fertile soil that is made up of about equal parts of clay, sand and silt |
| Soil Horizon | A layer of soil that differs in color and texture from the layers above or below it |
| Topsoil | Mixture of humus, clay and other minerals that forms the crumbly, topmost layer of soil |
| Subsoil | The layer of soil beneath the topsoil that contains mostly clay and other minerals |
| Litter | The loose layer of dead plant leaves and stems on the surface of the soil |
| Decomposers | Soil organisms that break down the remains of organisms and digest them. |
Created by:
Upton 6th Science
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