Erosion and Weathering Vocabulary

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Terms in this set (...)

Chemical Weathering
Process that breaks rocks by changing their chemical composition.
Delta
Land formed where a river deposits its sediment into a lake or river.
Depositon
Dropping (depositing) of sediment by water, wind, or ice.
Erosion
Movement of soil and rocks by water, wind, and ice.
Flood
Large amount of water covering land that is usually dry, often caused by heavy rain, melting snow, or high tides.
Floodplain
Flat area beside a river that is covered with water when a river floods
Glacier
Large, slow moving mass of ice. Creates U shaped valley
Gravity
Force that causes materials to move downward; main force causing erosion and deposition.
Groundwater
Fresh water that is stored in the ground.
Humus
Decayed plant and animal matter in soil.
Moraine
Ridges of glacial tills; created as a moving glacier gathers and deposits Earth material in its path.
Physical Weathering
Mechanical breakdown of rocks into smaller pieces by natural processes.
Runoff
Rainwater or melting snow that drains off the land into streams.
Sediment
Particles of Earth materials, such as rock, sand, and soil that are formed by weathering and carried by moving water, wind, or ice.
Soil
Loose material that covers much of earth, made of weathered rock, humus, air, and water.
Soil Horizon
Soil layer
Volcano
Opening in earth's crust through which magma erupts from the mantle; mountain formed from past eruptions.
Weathering
Process of breaking down rocks into smaller pieces by water, wind, temperature changes and other factors.

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