Weathering and Erosion
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weathering_and_erosion_definitions.docx | |
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Weathering
Weathering is where rocks and minerals are broken down into smaller and smaller pieces. Extreme heat and cold, water, and ice can all cause weathering. Water wears away rocks, and can dissolve them. When water seeps into cracks on a rock, it freezes, and gets bigger, causing the rock to push out.
Erosion
Erosion is simply the transportation of weathered, or broken down, materials. Wind, water and ice can erode, and so can movements from the earth. Water can carry the broken down rocks, and so can wind.
A landslide is when lots of materials are carried down a steep hill by gravity.
A mudslide is when water makes the side of a hill heavy, and carries it downward.
Slumps are when a large amount of rock or dirt, or other sediments, fall. All the material in a slump always comes down at once, where a
landslide can have many rocks tumbling down at different times.
Deposition
Deposition is when sediment, and broken down substances are deposited, or laid down somewhere. This can happen when wind or water slows down. The loss of velocity is a loss of energy and so the load cannot continue to be carried.
Weathering is where rocks and minerals are broken down into smaller and smaller pieces. Extreme heat and cold, water, and ice can all cause weathering. Water wears away rocks, and can dissolve them. When water seeps into cracks on a rock, it freezes, and gets bigger, causing the rock to push out.
Erosion
Erosion is simply the transportation of weathered, or broken down, materials. Wind, water and ice can erode, and so can movements from the earth. Water can carry the broken down rocks, and so can wind.
A landslide is when lots of materials are carried down a steep hill by gravity.
A mudslide is when water makes the side of a hill heavy, and carries it downward.
Slumps are when a large amount of rock or dirt, or other sediments, fall. All the material in a slump always comes down at once, where a
landslide can have many rocks tumbling down at different times.
Deposition
Deposition is when sediment, and broken down substances are deposited, or laid down somewhere. This can happen when wind or water slows down. The loss of velocity is a loss of energy and so the load cannot continue to be carried.
The movement of soil
![Picture](/uploads/2/3/5/8/23585002/_2408856.jpg)
Soil is carried on the wind (everyone has seen a dust storm of some sort).
Whenever there is a dust storm in Adelaide it has usually come from the Yorke Peninsula and the farmers are upset that their precious soil has blown away.
![Picture](/uploads/2/3/5/8/23585002/_7651139.jpg)
Soil is carried by water.
As you travel around the neighbourhood or further afield through the country side, evidence of erosion can be seen in the form of gullies and ditches. Mud is washed onto the road as the soil is taken from gardens, parks and paddocks. Rivers are constantly picking up soil from the bank and bed and dropping it further downstream.
![Picture](/uploads/2/3/5/8/23585002/_8699826.jpg)
Ice in the form of glaciers (frozen rivers) such as those in New Zealand and the Arctic, carry not just soil but huge boulders and rocks.
Weathering and Erosion
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Erosion of coast, river and mountains
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