Kamis, 22 November 2012

IPA Exogenous labor

Exogenous labor

The exogenous labor force from outside the earth. General nature of the exogenous force is overhauling the form of the earth's surface result endogenous formation of energy.
Hill or cliff formed endogenously outcome power eroded by the wind, so as to change the shape of the earth's surface.
In general, exogenous energy comes from three sources, namely:
ü The atmosphere, the change in temperature and wind.
ü Water which can include running water, rain, waves of the ocean, glaciers, and so on.
ü organisms in the form of micro-organisms, plants, animals, and humans.

Power Type Exogenous
1. weathering
     a. Weathering Physical / Mechanical
     b. Chemical weathering
     c. Weathering Biology / Organic
2. transport
     a. by the water
     b. by wind
     c. due to gravity
     d. by Glacier
3. Erosion / Erosion
4. Sedimentation / deposition
Biological weathering:
One of the weathering that can happen is biological weathering. One example is the decay caused by the disturbance of the roots of plants are quite large. The roots of the plants that are able to create cracks in the rock and eventually can break down rocks into smaller parts.

Weathering û physics: temperature changes from hot to cold will make the rock change.
û The rain was also able to make the existing cracks in the rocks to be developed so that the physical processes can make rocks break into smaller parts.

The chemical weathering:
some type of chemical solution can react with the rocks such as for example a solution of HCl will react with limestone. Even water can react melarutan some rock types. One obvious example is the "acid rain" which greatly affects the occurrence of the chemical weathering.
l Erosion often called erosion. Erosion is the process of erosion of the rock by water, wind, or glaciers.
• Soil erosion is soil weathered and prone to destruction

l The wind can cause erosion of rocks.
l Wind by hembusannya accompanied by material that he brought in a desert area hit rock mountains, so it can be turned into natural sculptures.
l rock erosion by wind is called decorating.
l The glacier is ice that flows slowly.
l This glacier can also be undermined. Glaciers erode the ability of (glacial erosion) can alter the riverbed into a U-shaped V-shaped
l The water can also cause erosion. when
l You look around the beach, waves or
l always crashing ocean waves beach,
l gradually eroding the beach.
l The erosion of rocks by the sea water is called
l abrasion. If water or waves that erode
l rocks carrying sand or rock material
l is small, then the energy will pengikisannya
l getting stronger.
l Sedimentation is the deposition of rock material events that have been transported by water or wind power earlier.
l When erosion occurs, the water carrying rocks
l flows into rivers, lakes, and finally to the sea.
l At the time of transport force is reduced or discharged, rocks deposited in the stream earlier. Because of this precipitation could occur in rivers, lakes and the sea.
l The precipitation that occurred in the river called fluvial sediments.
l The deposition is usually a rolling stone, rock slide, sand, gravel, and mud that covered the bottom of the river. Even the river sediment is very well utilized for building or paving material. Therefore, not a few people who seek livelihood of sand, gravel, or rock sediment yield was up for sale.
l In the lake sediment rocks also occur. The results are usually in the form of sediment delta, lining gravel, sand, and mud. The process of deposition of sediment in the lake is called limnis.
l deposition on land, for example guguk sand on the beach from the sand up into the air at the time of the waves breaking on the shore ramps and sea breeze inland, thus forming a high sand pile. For example, guguk sand along the western coast of Dutch sea dike y ang into the country.
l In Indonesia guguk resembling sand in the Netherlands can be found on the coast of Parang Tritis Yogyakarta. 

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