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3Weathering/Erosion
Unit 3 Weathering and Erosion
Term | Definition |
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Weathering | a process that breaks down rock and other substances at Earth’s surface |
Erosion | the movement of rock particles by water or wind |
Deposition | the process in which transported sediment is laid down |
Chemical Weathering | the breakdown of rocks by chemical reactions that change the rock’s make-up or composition. |
Physical Weathering | the break up of rocks by physical forces such as ice, water, pressure release, root growth, and abrasion. |
Nonrenewable resources | a resource that exists in a fixed amount or is used up faster than it can be replaced. |
Renewable resources | A natural resource that can be replaced in nature at about the same rate that it is used up. |
Conservation | The process of protecting or saving a natural resource. |
Organic Matter | soil derived from living things |
Soil Horizons | A soil layer with physical and chemical properties that differ from those of soil layers above and below it. |
Soil Profile | The soil horizons in a specific location; a cross section of soil layers that displays all soil horizons. |
Constructive Forces | Forces that build up Earth’s surface such as volcanic eruptions and deposition of sediment |
Destructive Forces | forces that tear down or wear away Earth’s surface such as erosion |
permeability | Soil's ability to let water and air pass through it. |
delta | a land formation created by sediments deposited at the mouth of a river. |