https://padlet.com/20399952/16aegl5ol91i en-us 2017-11-02 18:51:51 UTC 2025-09-30 15:02:00 UTC hello@padlet.com 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/203078494 Sand dunes are formed by the process of abrasion. This is where there are big rocks that bump against each other and break down into smaller particles and eventually form sand. The sand dunes themselves form by the particles being collected in a sheltered place. The more particles that are deposited the bigger the sand dunes become.  ]]> 2017-11-02 18:53:54 UTC https://padlet.com/20399952/16aegl5ol91i/wish/203078494 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204122391 Hoodoos are formed by the process of frost wedging. The water seeps into the fractures in the rock and then when it freezes it expands and breaks apart the rock. Eventually enough of the rock breaks off to form the unique rock structures.]]> 2017-11-06 20:54:43 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204122391 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204189680 Pinnacles are formed by abrasions. The shells of old marine life are broken down into lime-rich sands. Then much like the formation of sand dunes the sand particles are blown to form high mobile dunes. The more are the sand that gets blown inland the higher the dunes get.]]> 2017-11-07 02:55:48 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204189680 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204190238 Arches are formed when soft rock is quickly eroded away by wind or water. This process is described as abrasion. The sediments that are carried by the wind rub against the rock and erode away the rock inside of the arch and eventually forms the "rock bridge" or arch.]]> 2017-11-07 02:58:00 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204190238 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204191401 Talus' are large piles of rock that form at the base of a  cliff or slope. Talus slopes are formed from the talus piles. Talus slopes are triangular and form after the exfoliation of rocks on a cliff or slope.]]> 2017-11-07 03:05:47 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204191401 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204341608 V-Shaped valleys form by water from a river flowing through the valley and eroding away some of the rock to make the V-Shape. The river contains rocks and as it flows through the rocks in the water hit against the valley to form the V-Shaped valley. This is a process called abrasion, where rocks break down due to the action of other rocks, in this case the valley breaks down into the V-Shape due to the rocks that are flowing downstream.]]> 2017-11-07 14:00:49 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204341608 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204345848 Meandering slopes are formed when the water in a stream erodes the outer bank and widens the stream. The inner part of the stream has significantly less energy than the outside and deposits silt. This happens from abrasion because the rocks in the stream erode away the outer bank.]]> 2017-11-07 14:08:07 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204345848 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204348370 Eventually, after a meandering stream form the curve in the stream becomes very intense and the neck of the curve(start of the curve) becomes very narrow. The river then cuts through the neck during an event such as a flood and the result is an ox-bow lake. An oxbow lake forms after a meandering stream. ]]> 2017-11-07 14:12:33 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204348370 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204385064 Sink holes form from the process of suffosion. Sinkholes form when the rock below the surface is soluble with water. The rock dissolves from ground water and the layer above caves in and a sink hole is formed.]]> 2017-11-07 15:08:08 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204385064 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204405046 Stalactites form when water trickles over rocks in a cave, and picks up carbon dioxide. Stalactites are made of calcite (calcium carbonate) and when all of these are added together they become calcium bicarbonate and when it come in contact with air it turns back into calcium carbonate, and calcite forms around the crack. As the water begins to drip the calcite lengthens and becomes thicker.]]> 2017-11-07 15:37:49 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204405046 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204413356 An arete is a thin crest of rock that is left after two glaciers have worn a steep ridge into the rock. A horn is formed when glacier erode three or more aretes. It forms a sharp peak. Cirques are a circular basins that are carved by the bottom of a glacier.]]> 2017-11-07 15:49:43 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204413356 20399952 https://padlet.com/20399952/16aegl5ol91i/wish/204417867 A creep is the slow downward progression of rock and soil  usually down a low grade slope. When earthquakes occur areas with steep slopes tend to slip and cause land slides.  Slumps is a form of mass that occurs when a mass of loose material moves a short distance down a slope.]]> 2017-11-07 15:56:08 UTC https://padlet.com/20399952/16aegl5ol91i/wish/204417867