Deposition is the result of erosion. Once an erosion agent (ice, water, wind or gravity) runs out of energy it will deposit its material on another surface and deposit any further material it has eroded from another site.
Deposition is the thermodynamic process by which gas changes directly to solid without passing through liquid state, such as frost forming on windows.
Erosion
Erosion is the natural process by which rocks and soil erode away over time, leaving gaps behind that eventually fill with new materials. Erosion has existed for billions of years.
Erosion can be caused by wind, ice, water or gravity; or as the result of physical or chemical weathering of rocks.
Water erosion is the most prevalent form of erosion. This happens when moving water collects bits of rock and dirt and transports them elsewhere – for instance, rivers often transport sediment downstream towards deltas or into the ocean where waves further erode it.
Water erosion occurs due to both physical and chemical forces. Chemical erosion occurs when the composition of rocks shifts, such as when iron rusts or limestone dissolves into water; physical erosion occurs when their shape shifts; this could include when sand and pebbles grind together on beaches or rocks tumble down slopes, leading to landslides or mass wastage.
Sublimation
While liquids evaporator (go from solid to vapor and finally gas) when heated, some solids can take an alternative path by going directly from solid state to gaseous one; this process is called sublimation and typically happens under specific temperature and pressure conditions. Dry ice (solid CO2) sublimes when warmed; its form appears to melt before dissipating completely into the atmosphere without ever becoming liquid; snow and ice also sublimate below their melting points while solid iodine becomes visible purple vapor when warmed!
Deposition occurs when gas particles lose energy and settle out to form solid like frost on windows on cold days, as seen with frost formation on window panes on cold mornings. Deposition also happens with organic compounds like mothballs (naphthalene balls) and camphor that exhibit deposition processes such as dropping from their containers onto surfaces like windshields or car bumpers.
Reactions
Deposition is an essential legal procedure that provides all parties involved in a case with as much information about it as possible prior to going to trial, so all sides can remain on an equal playing field and avoid surprises at trial. Therefore, witnesses must respond truthfully during depositions without providing false answers or making assumptions or speculations.
Reactions involve the transformation of gas molecules to solid through removal of thermal energy from them, for instance when water vapour in sub-freezing air changes directly to ice without first becoming liquid. Students study states of matter and changing states from year 4 onwards (aged 8+), though this subject may not always be taught adequately. Chemical Vapor Deposition (CVD) is an industrial coatings process which uses heat or plasma to deposit dense thin films onto substrates; X-Ray Photoelectron Spectroscopy can provide valuable information regarding surface chemistry of these deposits.
Transport
Teachers may introduce deposition to students aged 8+ in year 4 as part of a unit on states of matter, which may be taught from that year forwards. Deposition occurs when molecules transition directly from gaseous state to solid state without passing through liquid phase; an example would be frost, which forms when water vapour from the air comes in contact with surfaces at or below freezing temperature and precipitates onto them directly.
Sediment transport is a geological process in which wind, ice and water transport previously weathered surface material into layers of sedimentation. This may consist of minerals, organic material or chemicals and pollutants; as well as planktonic remains that undergo chemical processes to form chalk 1. Sediments also include clays, silts, sands as well as organic detritus such as decomposing organic material that eventually forms chalk 1. Sedimentation plays an essential part in creating many geological features such as coal, limestone and sandstone formation.