Starter quiz
- Identify the answer that correctly describes constructive waves.
- Constructive waves have a stronger swash than backwash and build up beaches. ✓
- Constructive waves have equal swash and backwash, maintaining beach levels.
- Constructive waves have a stronger backwash than swash and erode the coastline.
- Constructive waves occur mostly during storms and erode the beach rapidly.
- Constructive waves break frequently and move material offshore from beaches.
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- What is the term used to describe the distance a wave has travelled?
- 1⇔F
- 2⇔E
- 3⇔T
- 4⇔C
- 5⇔H
- Which of these is an example of a sedimentary rock?
- Slate - formed when shale is heated and compressed by tectonic processes.
- Basalt - a volcanic rock that forms from rapidly-cooling lava.
- Granite - formed from cooled magma.
- Marble - formed when limestone is heated and compressed by tectonic processes.
- Limestone - formed from layers of sediment compressed into rock. ✓
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Reorder the statements to provide labels for these diagrams, from left to right.- 1⇔Layers of more and less resistant rock are perpendicular to the coast.
- 2⇔Waves erode less resistant rock more quickly than more resistant rock.
- 3⇔Bays are eroded into less resistant rock, leaving headlands of resistant rock.
- Which of the following are required for a spit to be formed?
- Longshore drift moving sediment along the beach in direction of prevailing wind. ✓
- Destructive waves removing sediment from the beach.
- A change in direction in the coastline (e.g. a river mouth). ✓
- No change in direction in the coastline (concordant coast).
- Constructive waves. ✓
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- What process is being described when a loss of energy causes sediment being transported by waves to be dropped?
- 'Deposition' ✓
Exit quiz
What process of sediment transportation is show in this diagram?- 'longshore drift' ✓
- The most frequent wind direction a location receives is known as the ______ wind direction.
- 'prevailing' ✓
- Which of the following landforms is not caused by deposition at the coast?
- spit
- bar
- beach
- stump ✓
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- Reorder the statement to explain how a spit is formed.
- 1⇔Winds blow waves at an angle toward the coastline.
- 2⇔Sediment is transported along the shore by longshore drift.
- 3⇔When the coastline changes direction, sediment deposition continues.
- 4⇔Sediment builds up, forming a narrow landform that extends into the sea.
- 5⇔A sheltered area behind the spit forms and may become a saltmarsh.
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Sediment transportation (longshore drift) and deposition (constructive waves) operate at the coast.
- Processes of transportation and deposition influences coastal landforms (spits, beaches, bars).
Common misconception
Spit formation occurs solely from sediment deposition.
Longshore drift, wave and wind direction play an important role in the formation of spits, and a change in direction of the coastline is required.
Keywords
Water column - refers to the vertical section of water from the surface to the sea bed
Prevailing wind - the most frequent wind direction a location receives
Deposition - the sea dropping sediment (or material) being carried by the water at the coastline
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