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Examine the photograph above and answer each of the following questions - Leaving Cert Geography - Question 2A - 2021
Question 2A
Examine the photograph above and answer each of the following questions. (i) Name each of the landforms formed by coastal processes labelled A, B, C and D. (ii) Na... show full transcript
Worked Solution & Example Answer:Examine the photograph above and answer each of the following questions - Leaving Cert Geography - Question 2A - 2021
Step 1
Name each of the landforms formed by coastal processes labelled A, B, C and D.
Answer
The landforms identified in the photograph are as follows:
- A = Cliff: This represents a steep face of rock and earth.
- B = Wave-cut platform: This is a flat area at the base of the cliff formed by wave action.
- C = Cave: This is a hollow area eroded into the cliff.
- D = Sea Stack: This is a column of rock that stands isolated from the shore, formed after the cliff has eroded away.
Step 2
Name two specific processes of coastal erosion.
Answer
Two specific processes of coastal erosion include:
- Abrasion: This process occurs when waves carrying sand and pebbles strike against coastal rocks, eroding them gradually.
- Hydraulic action: This refers to the force of waves crashing against a rock face, which compresses air in cracks and can lead to erosion.
Step 3
Explain briefly what is meant by constructive waves.
Answer
Constructive waves are characterized by their strong swash and weak backwash. They typically build up the beach by depositing sand and pebbles. The energy of the waves is mostly channeled forward during the swash phase, allowing sediments to accumulate on the shore.
Step 4
Explain briefly what is meant by wave refraction.
Answer
Wave refraction is the bending of waves as they approach the shore at an angle. This process occurs when waves encounter shallow water near the coastline, causing the wave front to slow down and change direction. As a result, waves concentrate their energy on headlands and dissipate in bays, leading to varied erosion and deposition patterns.