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Explain, with the aid of diagrams, the formation of any two landforms that you have studied - Leaving Cert Geography - Question C - 2013
Question C
Explain, with the aid of diagrams, the formation of any two landforms that you have studied. OR Describe and explain any two processes of mass movement.
Worked Solution & Example Answer:Explain, with the aid of diagrams, the formation of any two landforms that you have studied - Leaving Cert Geography - Question C - 2013
Step 1
Formation of a Delta
Answer
Deltas are formed at the mouth of rivers where they meet standing water bodies like seas or lakes. As the river flows into these bodies, it loses energy, causing sediment it carries to settle, forming a delta.
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Processes Involved:
- Deposition: The river deposits its load as it slows down, building up land over time.
- Sediment Types: Coarse materials settle first, followed by finer silt and clay, forming distinct layers.
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Diagrams: Include a diagram showing the river’s path and the delta shape along with arrows representing river flow and sediment deposition.
Step 2
Formation of a Sand Dune
Answer
Sand dunes are formed in desert environments where wind is the primary agent of sediment transport. The wind carries sand grains across the landscape until they accumulate in mounds, creating dunes.
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Processes Involved:
- Erosion: Wind erodes loose particles from a source area, lifting them into the air.
- Transportation: These particles are then carried across great distances by wind currents.
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Diagrams: Include diagrams illustrating how wind shapes sand dunes, indicating wind direction and the movement of sand.