Term
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Definition
| The process that breaks down rock and other substances at Earth's surface |
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Term
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Definition
| The movement of rock particles by wind, water, ice, or gravity |
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Term
| Mechanical Weathering (Physical Weathering) |
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Definition
| The type of weathering in which rock is physically broken into smaller pieces. |
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Definition
| The grinding away of rock by rock particles carried by water, ice, wind, or gravity. |
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Definition
| The process that splits rock when water seeps into cracks, then freezes and expands. |
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Definition
| The process that breaks down rock through chemical changes. |
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Definition
| A material is full of tiny, connected air spaces that allow water to seep through it. |
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Definition
| The loose weathered material on Earth's surface in which plants can grow. |
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Definition
| The solid layer of rock beneath the soil. |
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Definition
| The decayed organic material in soil. |
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Definition
| A layer of soil that differs in color and texture from the layers above or below it. |
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Definition
| A crumbly, dark brown soil that is a mixture of humus, clay, and other minerals. |
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Definition
| A soil that usually consists of clay and other particles washed down from the layer of topsoil above it. Subsoil doesn't contain much humus. |
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Definition
| The organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals. |
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Definition
| A resource that is naturally replaced in a relatively short time. |
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Definition
| The thick mass of tough roots at the surface of the soil. |
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Definition
| The management of soil to prevent its destruction. |
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Definition
| The practice of plowing fields along the curves of slopes. |
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Definition
| A soil conservation method in which the dead stalks from the previous year's crop are left in the ground to hold the soil in place. |
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Term
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Definition
| A loose layer of shed plant leaves. |
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Definition
| Soil that is made up of about equal parts of clay. sand, and silt. |
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Term
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Definition
| An area where wind erosion caused severe loss of topsoil during the 1930s. |
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Term
| What factors cause mechanical weathering? |
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Definition
* Freezing
* Thawing
* Release of pressure
* Growth of plants
* Actions of animals |
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Term
| Describe three causes of chemical weathering. |
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Definition
* Water (dissolve rock)
* Oxygen (when in the presence of water causes rust)
* Carbon Dioxide (carbonic acid weathers marble and limestone)
* Living organisms (plants's roots weather rocks)
* Acid rain |
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Term
| What factors affect the rate of weathering? |
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Definition
| The type of rock and climate. |
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Term
| Why does chemical weathering occurs faster in hot, wet climates than in cool, dry climates? |
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Definition
| Chemical reactions occur faster at higher temperatures. |
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Term
| What role does weathering play in the formation of soil? |
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Definition
| Soil forms as rock is broken down by weathering and mixes with other materials on the surface. |
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