Mr. Hardy science 8th grade

Term Definition
erosion Process in which surface materials are worn away and transported from one place to another by agents such as gravity, water, wind and glaciers
deposition dropping of settlements that occurs when an agent of erosion, such as gravity, wind, or water, loses its energy and no longer carry its load
mass movement any type of erosion that occurs when a mass of materials down slope
slump a type of mass movement that occurs when a mass of material moves down a curved slope
creep a type of mass movement in which settlements move down slope very slowly; it is common in areas of freezing and thawing, can calls walls, tress, and fences to lean downhill
glacier large, movement masses of ice and snow that change large areas of the Earths surface through erosion and deposition
plucking process that adds gravel, sand, and boulders to glaciers bottom and sides as water freezes and thaws, breaking off pieces of surrounding rock
till mixture of different-sized sediments that is dropped from the base of retreating glacier and can cover huge areas of land
moraine large ridges of rocks and soil deposited by glacier when it stops moving forward
outwash material deposited y meltwater from a glacier
deflation a type of erosion that occurs when wind blows over loose sediments, removes small particles, and leaves coarser sediments behind
abrasion the type of erosion that occurs when windblown sediments strike rocks and sediments, polishing and pitting their surface
loess windblown deposit of tightly packed, fine-grained sediments
dune mound formed when windblown sediments pile up behind an obstacle; common land form in the desert areas

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