Erosion and Weathering?
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weathering is where the material is actually broken down where as erosion is what moves it to another place
424828
Soil and climate conditions.
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If you are asking what are the minerals that are most resistant to weathering, I can give you some help. How fast any particular mineral actually moves through the rock cycle is hard to answer, since it really depends on the setting.  In general the deeper a mineral forms (higher pressure and temperature) the more unstable it is at the surface. Quartz and muscovite are two of the more stable minerals. \n\nHere's some chemical weathering rates:\nMean lifetime of 1 mm or fresh rock (Nahon, 1991)\nRock Type................ Climate..................... Lifetime (years) \nAcid rocks...............tropical semi-arid.......... 65 to 200\n..................................tropical humid........................ 20 to 70\n..................................temperate humid........................ 41 to 250\n.................................. cold humid.................... 35 \nMetamorphic rocks..... temperate humid..........33 \nBasic rocks.................... temperate humid.........68\n..........................................tropical humid.............. 40
799885
This is a great way to begin understanding the different forces that shape the land.  It is important to remember how the rocks came to be found, Metamorphic rocks from Michigan that may have been dug up from a deep quarry or found on the surface exposed by glacial action.  In N Carolina they could be sedimentary rocks exposed by water erosion.  In Florida they could very likely be calcium carbonate deposited by ancient coral reefs.  A simple understanding of these and other rock forming processes would make a prize winning 4th grade report.  Good Luck!
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During the process of erosion, the surface of a rock is broken down.\n\nIt can be done by one or two means...\n\nMechanical weathering: rock is broken down into smaller pieces through frost wedging, abrasion, exfoliation, etc.\n\nChemical weathering: rock is broken down into one or more new substances usually through the action of water. Water reacts w/ iron to produce iron oxide. Water also reacts w/ other elements & compounds to produce mild acids that eat away at the surfaces of rocks. Most of the acids are completely natural while some are caused by pollution.\n\nBoth of these can act together to break rock down faster. When a rock has been mechanically weathered it's surface area will increase allowing the chemical weathering to occur at a faster rate.
210837
Tectonic movements (earthquakes), volcanic action, and erosion.  \n\n1. Tectonic movements -- As the various plates that make up the Earth's surface move around, some crash into each other and one is forced up over the other.  Thus, for example, Himalayas.  The rocks that were deep underground are forced up near the surface.\n\n2. Volcanoes spew out lava which forms igneous rocks, but certain kinds of explosions will toss out large chunks of metamorphic rock from deep underground as well.\n\n3.  Erosion is primarily responsible for most of what we see as the surface of the Earth. While the other two actions will bring the rock near the surface, the action of wind and water removes the top layers of dirt and lighter rock.  Most significant is the action of glaciers, which strip everything down to the bare rock -- this is, I believe, why you find granite near the surface in New Hampshire.
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Physical and Chemical weathering of rock \n\nerosion is only related to the transport of rock and sediment
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Erosion is the displacement of solids (soil, mud, rock and other particles) by the agents of wind, water or ice, by downward or down-slope movement in response to gravity or by living organisms (in the case of bioerosion).\n\nDeposition, also known as sedimentation, is the geological process whereby material is added to a landform. This is the process by which wind, water or ice create a sediment deposit, through the laying down of granular material that has been eroded and transported from another geographical location.\n\nDeposition occurs when the forces responsible for sediment transportation are no longer sufficient to overcome the forces of particle weight and friction, which resist motion. Deposition can also refer to the build up of a sediment from organically derived matter or chemical processes. For example, chalk is made up partly of the microscopic calcium carbonate skeletons of marine plankton, the deposition of which has induced chemical processes (diagenesis) to deposit further calcium carbonate.
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In addition to that, fossils are of a different density than the surrounding rock.  As such, erosion will wash away either the surrounding rock or the fossil first.\n\nActual animal and plant remains are usually harder - either due to the bones, or calcification in dead tissue, so erosion will expose the fossil.\n\nAnimal prints made in mud flats will be softer than the surrounding rocks and water will hollow out the print.\n\nThere are some remarkable prints in Dinosaur State Park in Texas.
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From what choices? There are a few erosion processes connected to glacial erosion. \nRock Failure\nPlucking\nAbrasion\nand even fluvial erosion called glaciofluvial erosion.\n\nHere are some examples:
970855
umm...erosion...landslide
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First of, these are both effects caused on the surface of an object. However, weathering is an effect produced over a longer period of time as a result of a natural phenomenon whereas abrasion is an effect produced by rubbing 2 different textured surfaces together.
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A complete answer to this question would require a very large book.  You will need better focus for a short answer.\n\nAcids dissolve most minerals and rocks.  Even water dissolves rocks or rock constituents over a long period of time.  There is fabulous erosion in calcium rich rocks creating tunnels and underground chambers...\n\nAcid rain enhances this process greatly.  Virtually all the salts in the oceans came by the erosion of rock salts over aeons of time spent under the never ceasing rainy seasons.\n\nSome conditions are rock forming or metamorphosing, others are rock dissolving.\n\nHeat and cold are also factors in the deterioration of rock, making it more vulnerable to water and acid rain.\n\nThere are many fabulous websites on rocks and minerals and gemstones.  Just Google some of that and you will pull up two or three super-excellent ones.\n\nTry also Googling "rock geological processes."  Keep it in quotes.
411537
The hydrolic cycle is the main cause of erosion.  Rain soaks into the ground.  To much rain can saturate the ground with water, and if there are not enough plants the rain soaked land can be too heavy and you will get mud slides.  Rain also forms runoff in the forms of streams, creeks, rivers and deltas.  Erosion occurs in all these forms of runoff.  It can be good because minerals are pulled from the dirt and redistributed for better farm land.  However erosion can also cause disasters like what happened in New Orleans after Katrina.  Erosion had caused the entire city to sink below sea level, so when the dikes collapsed the water flooded the city.
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Two reasons:\n\n1.)  Chemical reactions tend to increase with temperature; the same would be true for chemical weathering.\n\n2.)  Save for deserts, warm areas tend to be rainier, and a warm, wet climate makes for rapid weathering.
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Depends what medium is eroding it.\nI think you're looking for the hardness scale.
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As the Earth buckled, deep cracks penetrated to the buried sandstone layer.\n\nErosion (wind and rain) wore away exposed rock layers and enlarged the surface cracks, isolating narrow sandstone walls, or fins. \n\nAlternating frosts and thawing caused crumbling and flaking of the porous sandstone and eventually cut through some of the fins.\n\nThe resulting holes were enlarged to arch proportions by rockfalls and weathering (again the effects of wind and rain).