Question
- Junior Cert. Geography (Higher) 2013: Section 2 Q1
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Answer
(i)
Mass movement is the movement of loose material (regolith) down a slope under the influence of gravity.
Precipitation influences mass movement because water makes the regolith heavier and acts as a lubricant. This means that the regolith can move easily and quickly down a slope.
Gradient also influences mass movement. Gradient refers to slope. When the slope is steep it is more likely that mass movement will occur.
(ii)
One slow type of mass movement is soil creep. The effects of soil creep can be seen on the landscape. Fences and trees bend downhill in the direction of the soil movement. Telegraph poles also tilt. As the soil moves downhill it causes walls to bulge and eventually collapse. Small steps called terracettes form on the sides of the slope.
Mass movement is the movement of loose material (regolith) down a slope under the influence of gravity.
Precipitation influences mass movement because water makes the regolith heavier and acts as a lubricant. This means that the regolith can move easily and quickly down a slope.
Gradient also influences mass movement. Gradient refers to slope. When the slope is steep it is more likely that mass movement will occur.
(ii)
One slow type of mass movement is soil creep. The effects of soil creep can be seen on the landscape. Fences and trees bend downhill in the direction of the soil movement. Telegraph poles also tilt. As the soil moves downhill it causes walls to bulge and eventually collapse. Small steps called terracettes form on the sides of the slope.
