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Constructive and Destructive Forces Unit 5th Grade constructive process: the building up of the Earth’s surface including deposition, earthquakes, volcanoes, and faults destructive process: the tearing down of the Earth’s surface including weathering, erosion, impact of organisms, earthquakes, and volcanoes deposition deposits of material which is added to a landform earthquake underground movement in the Earth’s crust that may cause change in the lithosphere erosion movement of material by water or wind weathering the breakdown, either physical or chemical, of rocks on the Earth’s surface fault a deep crack in the Earth’s surface where plates slide against each other volcano the escape of hot, molten rock and gas from the Earth’s interior Video delta: an area of new land at the mouth of a river, formed from sediments carried by the river sand dunes a hill of sand, made and shaped by wind decomposers organisms that lives by feeding on and breaking down dead plants and animals organisms an individual form of life, such as a plant, animal, bacterium, or fungus flood control the use of tools such as dams and levees to reduce destruction caused by floods beach restoration the process of replacing sand on a beach that was lost due to erosion and deposition seismological studies the study of earthquakes