Marine Processes and Associated Landforms — Flashcards
ICSE · Class 11 · Geography
35 flashcards for Marine Processes and Associated Landforms (ICSE Class 11 Geography) to test yourself on key terms and facts.
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What are sea waves and why are they important in coastal geography?
Answer
Sea waves are undulations of sea water with well-developed crests and troughs. They are the chief agent of gradation in coastal areas, so they strongly shape coastal landforms through erosion, transpo…
Define crest and trough in a sea wave.
Answer
The crest is the upper part of a wave, while the trough is the lower part. These two parts help describe the shape and size of a wave.
What causes most sea waves to form?
Answer
Most sea waves are caused by the friction of air on sea water. After formation, wind can also add more energy by pressing against the sides of the wave troughs.
Why does water in deep sea waves not move forward as a whole?
Answer
In deep water, there is no progressive forward motion of water particles in a wave. The particles move in circular orbits, so only the wave form moves forward while the water itself stays nearly in pl…
What is swash and what is backwash?
Answer
Swash is the water that rushes up the beach carrying sand and gravel landward. Backwash is the water that returns down the beach after swash stops, carrying sand and gravel back towards the sea.
What is the difference between coast, shore, and coastline?
Answer
Coast is the part of the land that faces the sea. Shore is the part of the land in close contact with the sea. Coastline is the boundary between the coast and the shore, and it marks the seaward limit…
What is the erosional work of sea waves dependent on?
Answer
The erosional work of sea waves depends on the size and strength of waves, the seaward slope, the height of the shore between low and high tides, the composition of rocks, and the depth of water.
Name the four ways sea waves act as an agent of erosion.
Answer
The four ways are hydraulic action, abrasion, attrition, and solution. These processes break rocks, wear them down, reduce rock fragments, and dissolve soluble rocks such as limestone, dolomite, and c…
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