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Examine the image above which illustrates erosion of a coastline from 2008 to 2018 and answer each of the following questions - Leaving Cert Geography - Question 1 - 2019

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Examine the image above which illustrates erosion of a coastline from 2008 to 2018 and answer each of the following questions. (i) Calculate the average annual rate... show full transcript

Worked Solution & Example Answer:Examine the image above which illustrates erosion of a coastline from 2008 to 2018 and answer each of the following questions - Leaving Cert Geography - Question 1 - 2019

Step 1

Calculate the average annual rate of erosion (in metres) between 2008 and 2018.

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Answer

To find the average annual rate of erosion, we first need to determine the total erosion in meters. The image indicates a distance of 16.5 meters between the positions of the sand dunes from 2008 to 2018. Since this period is 10 years, we calculate:

extAverageannualrateoferosion=16.5extmeters10extyears=1.65extmeters/year. ext{Average annual rate of erosion} = \frac{16.5 ext{ meters}}{10 ext{ years}} = 1.65 ext{ meters/year}.

Step 2

Name two processes of coastal erosion.

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Answer

  1. Hydraulic action.

  2. Abrasion.

Step 3

Name two landforms formed as a result of coastal erosion.

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Answer

  1. Cliffs.

  2. Wave-cut platforms.

Step 4

State whether the following statement is true or false. The strength of a destructive wave's swash is weaker than its backwash.

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Answer

True.

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