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Explain, with the aid of diagrams, the formation of any two landforms. - Leaving Cert Geography - Question (i) - 2018
Question (i)
Explain, with the aid of diagrams, the formation of any two landforms.
Worked Solution & Example Answer:Explain, with the aid of diagrams, the formation of any two landforms. - Leaving Cert Geography - Question (i) - 2018
Step 1
Landform 1: River Delta
Answer
A river delta is formed at the mouth of a river where it meets a standing body of water, such as a sea or lake. As the river flows, it carries sediment like clay, silt, and sand from the land. When the river reaches the slow-moving water, it loses energy and deposits this sediment, which gradually builds up to form a delta.
Diagram
The image above illustrates sediment deposits creating the delta shape over time.
Key Features
- Sediment Deposition: The river carries sediment, which is deposited at the river's mouth, initiating delta formation.
- Water Flow Reduction: The transition from fast-flowing river water to slow-moving water causes sediment to settle, leading to the expansion of land.
Step 2
Landform 2: Sand Dune
Answer
Sand dunes are formed by the wind's action on loose sand. Wind erodes and transports sand particles across flat areas. When the wind encounters an obstacle, such as a rock or vegetation, it loses energy and drops the sand it has been carrying, forming a dune.
Diagram
This diagram depicts how wind shapes and builds a sand dune over time.
Key Features
- Wind Erosion: Wind transports sand by lifting and moving particles from one place to another.
- Deposition: When the wind slows, it deposits sand, building up mounds, which form sand dunes.