Coastal landforms and processes investigate the dynamic boundary where land meets the sea, shaped continuously by wave action, tides, currents, and sea-level fluctuations. Driven by marine erosion through hydraulic action and abrasion, coastlines carve rugged features like sea cliffs, arches, and wave-cut platforms. Simultaneously, littoral transport mechanisms like longshore drift redistribute sediments to build expansive depositional landforms including spits, barrier islands, and tombolos. Mastering these marine geomorphic cycles is crucial for understanding coastal hazards, sea-level changes, and environmental management.
1. What is the term used to describe the uninterrupted distance of open water over which the wind blows to generate waves?
Correct Answer: b) Fetch
Explanation:
Fetch is the distance over which wind blows continuously in one direction across the water surface, which is a major factor in determining wave size and energy.
2. Which of the following characteristics best describes constructive waves?
Correct Answer: b) Low wave height and strong swash
Explanation:
Constructive waves have a low height, a long wavelength, a strong swash, and a weak backwash, causing them to deposit material and build up the beach.
3. Destructive waves are typically characterized by a wave frequency of approximately:
Correct Answer: c) 10 to 15 waves per minute
Explanation:
Destructive waves have a high frequency (typically 10-15 per minute), plunging breakers, and a strong backwash that erodes the beach.
4. The bending of wave crests as they approach a shallow and irregularly shaped coastline is known as:
Correct Answer: c) Wave refraction
Explanation:
Wave refraction is the process where waves bend to align themselves more closely with the contours of the coastline as they move into shallower water.
5. At what water depth do ocean waves begin to 'feel the bottom', causing their speed to decrease and wave height to increase?
Correct Answer: b) One-half the wavelength
Explanation:
The wave base is at a depth equal to one-half the wavelength. Below this depth, wave motion is negligible; above it, the wave interacts with the seabed.
6. The forward movement of water up a beach after a wave breaks is called:
Correct Answer: c) Swash
Explanation:
Swash is the rush of water up the beach face following the breaking of a wave, driven by the wave's forward energy.
7. Which process of coastal erosion involves the sheer force of water compressing air in cracks in rocks, causing them to break apart?
Correct Answer: c) Hydraulic action
Explanation:
Hydraulic action is the physical force of water compressing air within cracks and faults in a cliff face, which exerts immense pressure and shatters the rock.
8. What erosional process occurs when rocks and pebbles carried by the sea are thrown against the cliff face, wearing it away like sandpaper?
Correct Answer: b) Abrasion (Corrasion)
Explanation:
Abrasion, or corrasion, is the wearing away of the coastline by sediment, rocks, and pebbles being hurled against the cliffs by waves.
9. The gradual rounding and smoothing of rocks and pebbles as they collide with each other in the waves is known as:
Correct Answer: c) Attrition
Explanation:
Attrition is the process where boulders and pebbles suspended in the waves continuously bump into each other, breaking down into smaller, smoother, and rounder pieces.
10. Which type of coastal rock is most susceptible to the erosional process of corrosion (solution)?
Correct Answer: c) Limestone
Explanation:
Corrosion (or solution) involves seawater dissolving minerals in rocks. Calcareous rocks like limestone and chalk are highly susceptible to being dissolved by weak acids in seawater.
11. What is a wave-cut notch?
Correct Answer: b) An indentation at the base of a cliff caused by wave erosion
Explanation:
A wave-cut notch is an undercut at the base of a cliff eroded by wave action (mainly hydraulic action and abrasion) between the high and low tide marks.
12. A gently sloping, rocky surface left at the base of a retreating sea cliff is called a:
Correct Answer: c) Wave-cut platform
Explanation:
As a cliff retreats inland due to the collapse of the overhanging rock above a wave-cut notch, it leaves behind a flat, rocky area known as a wave-cut platform.
13. A coastline with alternating bands of hard and soft rock oriented perpendicular to the coast is known as a:
Correct Answer: b) Discordant coastline
Explanation:
A discordant coastline has bands of differing rock types running perpendicular to the shore, leading to the formation of headlands and bays due to differential erosion.
14. Along a discordant coastline, softer rocks erode faster to form:
Correct Answer: b) Bays
Explanation:
Bays are formed when areas of softer, less resistant rock (like clay or sand) are eroded more rapidly than adjacent harder rock, causing the coastline to retreat.
15. Which sequence correctly represents the evolution of headland erosion?
Correct Answer: a) Cave -> Arch -> Stack -> Stump
Explanation:
Wave action exploits faults to form a cave, which can break through to form an arch. The arch collapses to leave an isolated stack, which eventually erodes into a stump.
16. An isolated pillar of rock standing just offshore, formed by the collapse of a sea arch, is called a:
Correct Answer: b) Stack
Explanation:
A stack is a steep and often vertical column of rock in the sea formed by wave erosion when the roof of a sea arch collapses.
17. A blowhole forms when:
Correct Answer: c) A vertical fault in a sea cave is eroded upwards to the cliff top
Explanation:
A blowhole is created when the roof of a sea cave erodes upwards along a vertical fault line, eventually breaking through to the cliff surface.
18. A long, narrow, steep-sided cleft or inlet formed by the collapse of a sea cave roof along a fault line is called a:
Correct Answer: a) Geo
Explanation:
A geo is a narrow, steep-sided inlet formed by the erosion and collapse of the roof of a cave or by the widening of a fault line.
19. The primary process responsible for the lateral transport of sediment along a beach is:
Correct Answer: b) Longshore drift
Explanation:
Longshore (or littoral) drift is the zigzag movement of sediment along a coast, driven by waves approaching the shore at an angle and the backwash moving straight down the beach.
20. Longshore drift occurs when waves approach the coastline:
Correct Answer: b) At an oblique angle
Explanation:
For longshore drift to occur, waves must strike the shore at an oblique (non-perpendicular) angle, causing the swash to move material sideways before the backwash pulls it straight down.
21. An extended ridge of sand or shingle projecting from the land into the sea, formed by longshore drift, is called a:
Correct Answer: b) Spit
Explanation:
A spit is a depositional landform formed where the coastline suddenly changes direction, allowing longshore drift to deposit material out into the open water.
22. What feature frequently forms in the low-energy, sheltered water behind a spit?
Correct Answer: c) A salt marsh
Explanation:
The area behind a spit is sheltered from wave action, creating a low-energy environment where fine muds deposit and salt-tolerant vegetation colonizes to form a salt marsh.
23. When a spit grows completely across a bay, connecting two headlands, it forms a:
Correct Answer: c) Bar (or barrier beach)
Explanation:
A bar (or barrier beach) is a ridge of sand or shingle that has grown completely across a bay, trapping a body of water behind it.
24. The body of brackish or saltwater trapped behind a coastal bar is called a:
Correct Answer: b) Lagoon
Explanation:
A lagoon is a shallow body of coastal water separated from the open ocean by a barrier such as a sand bar, barrier island, or coral reef.
25. A ridge of sand or shingle that connects an island to the mainland is known as a:
Correct Answer: a) Tombolo
Explanation:
A tombolo is formed by longshore drift or wave diffraction depositing sand in the 'wave shadow' behind an island, eventually connecting it to the mainland.
26. Chesil Beach in Dorset, UK, which connects the Isle of Portland to the mainland, is a classic example of a:
Correct Answer: b) Tombolo
Explanation:
Chesil Beach is a famous tombolo that connects the Isle of Portland to the mainland coast of Dorset, created by complex shingle transport processes.
27. A berm on a beach is most commonly associated with:
Correct Answer: b) Deposition at the high-water mark
Explanation:
A berm is a terrace of a beach that has formed in the backshore, above the water level at high tide, representing the accumulation of sediment thrown up by swash.
28. Crescent-shaped indentations found along the shoreline of a beach, typically formed by a combination of swash and backwash interactions, are called:
Correct Answer: a) Beach cusps
Explanation:
Beach cusps are shoreline formations composed of regular, crescent-shaped indentations with coarser material at the 'horns' and finer material in the 'embayments'.
29. Compared to sand beaches, shingle beaches generally have a profile that is:
Correct Answer: b) Steeper
Explanation:
Shingle beaches are steeper than sand beaches because the large, porous pebbles allow the swash to percolate quickly, reducing the backwash and piling material up steeply.
30. Which of the following is required for the formation of coastal sand dunes?
Correct Answer: a) A wide beach exposed at low tide and an onshore wind
Explanation:
Sand dunes require a large supply of sand (exposed at low tide), a strong onshore wind to transport it inland, and an obstacle (like driftwood) to trigger deposition.
31. In the succession of sand dunes (psammosere), the first plants to colonize an embryo dune, such as Marram grass, are known as:
Correct Answer: b) Pioneer species
Explanation:
Pioneer species like Sea Rocket and Marram grass are the first to colonize harsh environments like embryo dunes, trapping sand and stabilizing the dune.
32. As you move inland from the beach, the sand dunes generally become:
Correct Answer: b) Taller, darker in color (more organic matter), and more acidic
Explanation:
As dunes age and move inland (yellow to grey dunes), vegetation adds organic matter (humus), darkening the soil and increasing its acidity.
33. Depressions between sand dune ridges where the water table is close to the surface, often supporting wetland plants, are called:
Correct Answer: b) Dune slacks
Explanation:
Dune slacks are low-lying troughs between dune ridges where wind erosion has reached the water table, creating damp, often biodiverse micro-habitats.
34. The physical process where clay particles aggregate and settle out of suspension in an estuary when fresh water meets salt water is called:
Correct Answer: b) Flocculation
Explanation:
Flocculation occurs in estuaries where electrically charged clay particles clump together when mixed with seawater, becoming heavy enough to sink and form mudflats.
35. Plants that are adapted to survive in highly saline coastal environments, such as those in a salt marsh, are called:
Correct Answer: b) Halophytes
Explanation:
Halophytes are plants adapted to live in environments with high salt concentrations, such as salt marshes and mangrove swamps.
36. Mangrove swamps typically develop in which type of coastal environment?
Correct Answer: b) Low-energy, tropical and subtropical coastlines
Explanation:
Mangroves require warm, tropical or subtropical temperatures and low-energy environments (like estuaries or lagoons) where fine sediments can accumulate.
37. Coral reefs generally require shallow water because:
Correct Answer: c) The symbiotic zooxanthellae algae require sunlight for photosynthesis
Explanation:
Corals rely on zooxanthellae, microscopic algae living in their tissues, which provide nutrients through photosynthesis. Sunlight cannot penetrate deep water.
38. A coral reef that is separated from the mainland or island shore by a deep lagoon is a:
Correct Answer: b) Barrier reef
Explanation:
Barrier reefs are separated from the adjacent landmass by a lagoon of open, often deep water, such as the Great Barrier Reef in Australia.
39. According to Charles Darwin's theory of atoll formation, an atoll forms due to:
Correct Answer: b) The gradual subsidence of a volcanic island surrounded by a fringing reef
Explanation:
Darwin theorized that as a volcanic island slowly subsides into the ocean, the surrounding fringing reef continues to grow upwards, eventually forming a ring-shaped atoll around a lagoon once the island sinks completely.
40. A global change in the volume of water in the oceans, or a change in the absolute capacity of ocean basins, leads to:
Correct Answer: b) Eustatic sea-level change
Explanation:
Eustatic change refers to a global alteration in sea level, typically driven by the melting of ice caps (increasing volume) or changes in ocean basin shape.
41. Localized changes in sea level caused by the uplift or depression of the Earth's crust are known as:
Correct Answer: b) Isostatic changes
Explanation:
Isostatic sea-level change is localized and involves the land rising or falling relative to the sea, such as post-glacial rebound after an ice sheet melts.
42. A coastline that has experienced a relative fall in sea level, exposing land that was previously underwater, is called an:
Correct Answer: a) Emergent coastline
Explanation:
An emergent coastline occurs when a fall in sea level or a rise in landmass exposes previously submerged seabed, creating features like raised beaches.
43. A prominent feature of an emergent coastline is a:
Correct Answer: c) Raised beach
Explanation:
Raised beaches are relic beaches stranded above the current high tide line due to a relative fall in sea level, characteristic of an emergent coast.
44. A submergent coastal feature formed when a non-glaciated river valley is flooded by rising sea levels is a:
Correct Answer: b) Ria
Explanation:
A ria is a drowned river valley that remains open to the sea, typically characterized by a winding, dendritic shape and relatively shallow waters.
45. A submergent coastal feature formed when a U-shaped glacial valley is flooded by the sea is a:
Correct Answer: b) Fjord
Explanation:
Fjords are deeply incised, U-shaped glacial troughs that were flooded by rising eustatic sea levels following the last Ice Age, often featuring steep sides and a shallow rock lip at the mouth.
46. Which of the following is characteristic of a Dalmatian coastline?
Correct Answer: c) Long, narrow islands running parallel to the mainland coast
Explanation:
A Dalmatian coast forms in a concordant coastal region when valleys running parallel to the coast are flooded, leaving the ridge tops exposed as a series of offshore islands.
47. Hard engineering in coastal management refers to:
Correct Answer: b) Constructing man-made, artificial structures to absorb or reflect wave energy
Explanation:
Hard engineering involves building large, often expensive physical structures like sea walls and groynes to defend the coastline against erosion and flooding.
48. Which hard engineering structure is a massive concrete wall designed to reflect wave energy back into the sea?
Correct Answer: b) Sea wall
Explanation:
A sea wall is a robust structure built parallel to the coast at the back of a beach or base of a cliff, reflecting wave energy but often suffering from basal scour.
49. Wooden or rock barriers built perpendicular to the shoreline to interrupt longshore drift and trap sand are called:
Correct Answer: c) Groynes
Explanation:
Groynes are designed to stop the movement of sediment via longshore drift, building up a wide beach on the updrift side, which absorbs wave energy.
50. A major disadvantage of installing groynes along a beach is that:
Correct Answer: b) They starve beaches further downdrift of sediment, accelerating erosion there
Explanation:
By trapping sediment locally, groynes prevent material from replenishing beaches further down the coast (downdrift), leading to increased erosion in those unmanaged areas (terminal groyne syndrome).
51. Large boulders placed at the base of a cliff or sea wall to absorb and dissipate wave energy are known as:
Correct Answer: c) Rip-rap (Rock armour)
Explanation:
Rip-rap, or rock armour, consists of large, resistant boulders piled up on a beach to break the force of incoming waves and protect the land behind.
52. Wire cages filled with smaller rocks and pebbles, stacked to form a retaining wall against coastal erosion, are called:
Correct Answer: a) Gabions
Explanation:
Gabions are wire mesh baskets filled with rocks. They are cheaper than sea walls and absorb wave energy, but the wire can rust and fail over time.
53. Sloping wooden, steel, or concrete structures placed parallel to the beach to absorb wave energy and protect cliffs are:
Correct Answer: b) Revetments
Explanation:
Revetments are sloped, open structures that absorb wave energy and trap beach sediment behind them, offering a semi-permeable defense.
54. Which of the following is considered a 'soft engineering' approach to coastal management?
Correct Answer: c) Beach nourishment
Explanation:
Soft engineering works with nature. Beach nourishment involves adding sand or shingle to widen a beach, increasing its ability to naturally absorb wave energy.
55. The strategy of 'managed retreat' (or coastal realignment) involves:
Correct Answer: c) Allowing low-value coastal land to flood naturally to create salt marshes
Explanation:
Managed retreat involves abandoning existing coastal defenses and letting the sea naturally flood inland areas, creating new salt marshes that act as natural buffers.
56. A self-contained section of the coastline within which the movement of coarse sediment is largely restricted is called a:
Correct Answer: a) Littoral cell (Sediment cell)
Explanation:
A sediment or littoral cell is a largely closed system regarding sediment movement, bounded by major headlands or deep-water features.
57. The balance between sediment added to a coastal system and sediment removed from it is known as the:
Correct Answer: b) Sediment budget
Explanation:
The sediment budget calculates the inputs (e.g., river discharge, cliff erosion) against the outputs (e.g., transport offshore) to determine if a beach is growing or shrinking.
58. Which sub-aerial weathering process involves water freezing in rock cracks, expanding by 9%, and shattering the rock?
Correct Answer: b) Freeze-thaw weathering
Explanation:
Freeze-thaw weathering (frost shattering) occurs when water enters cracks, freezes, and expands, exerting immense pressure that breaks the rock.
59. The breakdown of rocks caused by the evaporation of seawater, leaving behind salt crystals that grow and exert pressure, is known as:
Correct Answer: a) Haloclasty (Salt weathering)
Explanation:
Haloclasty occurs when saline water enters cracks and evaporates, causing salt crystals to grow and exert physical pressure on the rock matrix.
60. A mass movement process where a large section of cliff drops down along a curved slip plane, often triggered by heavy rain, is called:
Correct Answer: c) Rotational slumping
Explanation:
Rotational slumping features a block of rock or soil sliding downward on a concave, curved failure surface, frequently occurring on saturated clay cliffs.
61. Which of the following mass movements happens incredibly rapidly and involves fragments breaking away vertically from a cliff face?
Correct Answer: c) Rockfall
Explanation:
Rockfall is a rapid mass movement occurring on vertical or near-vertical cliffs, often triggered by freeze-thaw weathering undercutting.
62. The phenomenon where coastal habitats like salt marshes are trapped between rising sea levels and fixed hard engineering structures is known as:
Correct Answer: a) Coastal squeeze
Explanation:
Coastal squeeze occurs when rising sea levels push coastal ecosystems landward, but they cannot migrate because of a hard defense like a sea wall, resulting in habitat loss.
63. Tides are primarily generated by the gravitational pull of the:
Correct Answer: b) Moon and the Sun
Explanation:
Tides are long-period waves that roll around the planet as the ocean is 'pulled' back and forth by the gravitational attraction of the Moon and the Sun.
64. When the Sun, Earth, and Moon are aligned (syzygy), their combined gravitational pull creates:
Correct Answer: b) Spring tides
Explanation:
During full and new moons, the gravitational pulls of the Sun and Moon combine, creating spring tides, which have the largest tidal ranges (highest high tides, lowest low tides).
65. Neap tides, which have the smallest tidal range, occur when the Sun and Moon are:
Correct Answer: b) At right angles (90 degrees) to the Earth
Explanation:
During the first and third quarter moons, the Sun and Moon pull at right angles, partially canceling each other out and producing a small tidal range called a neap tide.
66. The vertical difference in height between consecutive high and low waters over a tidal cycle is the:
Correct Answer: b) Tidal range
Explanation:
The tidal range is the vertical distance between the high tide and the succeeding low tide.
67. A coastline with a tidal range of greater than 4 meters is classified as:
Correct Answer: c) Macrotidal
Explanation:
Coastal classifications based on tidal range include microtidal (4m).
68. An abnormal rise of water generated by a storm, over and above the predicted astronomical tide, is a:
Correct Answer: c) Storm surge
Explanation:
A storm surge is a rise in coastal water level caused primarily by strong onshore winds and low atmospheric pressure during intense storms.
69. The time period when the tide is falling (moving from high tide to low tide) is known as the:
Correct Answer: b) Ebb tide
Explanation:
An ebb tide is the receding or falling tide as water flows away from the shore.
70. The time period when the tide is rising (moving from low tide to high tide) is known as the:
Correct Answer: b) Flood tide
Explanation:
A flood tide refers to the incoming or rising tide, as water flows toward the shore.
71. The brief period of little or no tidal current just before the tide reverses direction is called:
Correct Answer: b) Slack water
Explanation:
Slack water (or slack tide) is the period at high or low tide when there is virtually no horizontal movement of water.
72. A true tidal wave, where the leading edge of the incoming tide forms a wave of water that travels up a river or narrow bay, is a:
Correct Answer: b) Tidal bore
Explanation:
A tidal bore occurs in some macrotidal estuaries where a steep wave of water travels upstream against the river current as the tide comes in.
73. Fast-moving, narrow channels of water that flow away from the shore, potentially dangerous to swimmers, are:
Correct Answer: b) Rip currents
Explanation:
Rip currents (often erroneously called rip tides) are strong, localized, and narrow currents of water that move directly away from the shore, cutting through the lines of breaking waves.
74. A point in the ocean where there is zero tidal amplitude, around which the tidal wave rotates, is an:
Correct Answer: a) Amphidromic point
Explanation:
An amphidromic point (or tidal node) is a geographical location with zero tidal range, caused by the Coriolis effect and the shape of ocean basins.
75. The wave steepness is calculated as:
Correct Answer: b) Wave height divided by wavelength
Explanation:
Wave steepness is the ratio of wave height to wavelength. When this ratio exceeds 1:7, the wave becomes unstable and breaks.
76. A breaker type characterized by a curling crest that falls over an air pocket, typically forming on steep beaches, is a:
Correct Answer: b) Plunging breaker
Explanation:
Plunging breakers occur on steep beach profiles. The wave crest curls over rapidly, creating a 'tube' or 'barrel', dissipating energy violently.
77. A breaker type that gently foams and spills down the front of the wave, typical of gently sloping, flat beaches, is a:
Correct Answer: c) Spilling breaker
Explanation:
Spilling breakers gradually break over a long distance on very flat beaches, with white water spilling down the wave face.
78. A breaker that doesn't actually break but rather rides up a very steep beach face, reflecting energy back to sea, is a:
Correct Answer: c) Surging breaker
Explanation:
Surging breakers happen on extremely steep shores where the wave doesn't plunge or spill, but instead surges straight up the beach face.
79. According to the coastal sediment budget, a 'sink' refers to:
Correct Answer: a) An area where sediment is permanently lost from the littoral cell, such as a deep submarine canyon
Explanation:
In a sediment budget, inputs are sources (rivers, cliffs), and outputs are sinks (deep ocean trenches, estuaries) where sediment is removed from the active coastal system.
80. The zone extending from the low-tide mark to the upper limit of wave action is generally called the:
Correct Answer: b) Littoral zone
Explanation:
The littoral zone (or intertidal zone) is the part of a sea, lake, or river that is close to the shore, encompassing the area affected by tidal and wave action.
81. A 'recurved spit' is formed primarily because of:
Correct Answer: a) A secondary wind/wave direction pushing the end of the spit inland
Explanation:
Spits often develop a curved or hooked end (recurved spit) when waves approach from a secondary, oblique direction, transporting sediment landward at the tip.
82. Which of the following describes a 'fjärd'?
Correct Answer: b) A drowned, glaciated lowland valley that is broader and shallower than a fjord
Explanation:
A fjärd is a glacially carved inlet but is formed in low-relief terrain, making it wider, shallower, and less steep-sided than a classic mountain fjord.
83. The measurement of the depth of water in oceans, seas, or lakes is called:
Correct Answer: b) Bathymetry
Explanation:
Bathymetry is the underwater equivalent to topography, representing the depth and shape of underwater terrain.
84. Submarine canyons are primarily formed by:
Correct Answer: b) Turbidity currents and river erosion during periods of low sea level
Explanation:
Submarine canyons, which cut through continental shelves, were often initially carved by rivers during ice ages (when sea levels were lower) and later deepened by underwater landslides called turbidity currents.
85. A fast-moving underwater avalanche of sediment-laden water that flows down the continental slope is a:
Correct Answer: c) Turbidity current
Explanation:
Turbidity currents are gravity-driven flows of dense, sediment-suspended water that carve submarine canyons and deposit graded beds on the abyssal plain.
86. What is 'cliff profiling' used for in coastal geography?
Correct Answer: b) Measuring the angle, height, and shape of a cliff to assess erosion rates
Explanation:
Cliff profiling involves taking repeated measurements of a cliff's morphology over time to track the rate and nature of coastal retreat.
87. A coast where the rate of deposition exceeds the rate of erosion is known as a:
Correct Answer: a) Advancing coast (Prograding)
Explanation:
A prograding or advancing coast builds outwards towards the sea because more sediment is being deposited than removed by marine processes.
88. Which of the following locations is famous for its rapid rate of coastal erosion due to soft boulder clay cliffs?
Correct Answer: a) The Holderness Coast, UK
Explanation:
The Holderness Coast in East Yorkshire is one of Europe's fastest eroding coastlines, retreating at around 2 meters per year due to its soft glacial till (boulder clay) cliffs.
89. The 'Hold the Line' coastal management policy means:
Correct Answer: b) Maintaining the current position of the coastline using hard or soft engineering
Explanation:
In Shoreline Management Plans, 'Hold the Line' dictates that the current coastline will be protected and maintained, typically where high-value infrastructure exists.
90. The 'Advance the Line' coastal management policy means:
Correct Answer: b) Building new coastal defenses further out to sea than the existing line
Explanation:
'Advance the Line' is a rare policy where new defenses are built seaward of the original coastline, usually to reclaim land for significant development.
91. Coastal vegetation helps to stabilize dunes and marshes primarily because:
Correct Answer: b) Its roots bind the loose sediment together and the foliage reduces wind/water velocity
Explanation:
Plants like Marram grass have extensive root networks that hold sand in place, while their stems create friction that slows wind and water, encouraging further deposition.
92. Which physical process leads to the formation of a coastal 'salt pan'?
Correct Answer: b) The flooding of a depression by high tides followed by evaporation, leaving salt deposits
Explanation:
Salt pans form in the upper sections of a salt marsh when seawater is trapped in a depression after a spring tide. Evaporation concentrates the salt, killing vegetation and leaving a bare pan.
93. What is the primary factor distinguishing an estuary from a ria?
Correct Answer: b) An estuary is a partially enclosed body where freshwater mixes with saltwater, whereas a ria is specifically a drowned river valley
Explanation:
While rias are a structural type of estuary (a flooded river valley), the term 'estuary' broadly refers to any coastal body where river freshwater meets and mixes with oceanic saltwater.
94. The Coriolis effect influences coastal currents by deflecting moving water to the:
Correct Answer: b) Right in the Northern Hemisphere and Left in the Southern Hemisphere
Explanation:
Because of Earth's rotation, the Coriolis effect deflects moving objects (like ocean currents) to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
95. The movement of sand driven by wind on a coastal beach is called:
Correct Answer: b) Aeolian transport
Explanation:
Aeolian processes refer to the wind's ability to shape the surface of the Earth. On coasts, aeolian transport is responsible for building sand dunes.
96. Which sub-aerial process involves the slow, downward movement of soil on a coastal cliff under the influence of gravity?
Correct Answer: b) Soil creep
Explanation:
Soil creep is a very slow mass movement process where individual soil particles slowly move downhill due to gravity, often exacerbated by wetting and drying.
97. A coastal 'chime' or 'chine' (e.g., Blackgang Chine) is defined as:
Correct Answer: b) A steep-sided coastal gorge where a river flows through soft cliffs to the sea
Explanation:
Common on the Isle of Wight and in Dorset, a chine is a steep, narrow ravine cut through soft coastal cliffs by a stream descending to the sea.
98. What is the primary function of planting marram grass in coastal management?
Correct Answer: b) To stabilize sand dunes through its extensive root system
Explanation:
Marram grass is a pioneer species planted in soft engineering projects. Its deep and extensive rhizome root system binds loose sand together, preventing dune erosion.
99. Which of the following best describes 'shoreline retreat'?
Correct Answer: b) The landward migration of the coastline due to erosion and sea-level rise
Explanation:
Shoreline retreat (or coastal retreat) refers to the coastline physically moving inland as the land is lost to erosion, subsidence, or rising sea levels.
100. A coastal environment dominated by the deposition of very fine clays and silts, heavily influenced by tides, is a:
Correct Answer: b) Mudflat
Explanation:
Mudflats develop in sheltered coastal areas (like estuaries or behind spits) where the water is calm enough for fine suspended sediments (silt and clay) to settle.
101. Which phenomenon can cause a temporary, localized increase in sea level due to extremely low atmospheric pressure?
Correct Answer: c) Inverse barometer effect
Explanation:
The inverse barometer effect occurs during intense storms (like hurricanes). For every 1 millibar drop in atmospheric pressure, the sea level rises by roughly 1 centimeter, contributing to storm surges.
102. The zone of the beach that is normally dry but gets reached by extreme high tides and storm waves is the:
Correct Answer: c) Backshore
Explanation:
The backshore is the area of a beach extending from the limit of high water foam lines to dunes or extreme inland limits of the beach, only affected by waves during severe storms.
103. The intertidal zone, lying between the low water mark and high water mark, is technically referred to as the:
Correct Answer: b) Foreshore
Explanation:
The foreshore (or intertidal zone) is the part of the beach exposed at low tide and submerged at high tide, where the swash and backwash operate most frequently.
104. Which of the following refers to a sudden, highly destructive sea wave triggered by an underwater earthquake or landslide?
Correct Answer: b) Tsunami
Explanation:
A tsunami is a series of massive waves generated by the displacement of a large volume of water, usually due to tectonic activity like undersea earthquakes or landslides.
105. An abnormally large, unpredictable, and sudden surface wave that occurs in the open ocean is called a:
Correct Answer: b) Rogue wave
Explanation:
Rogue waves (or freak waves) are massive, spontaneous, and highly dangerous ocean waves that occur seemingly out of nowhere, often more than twice the height of surrounding waves.
106. Which concept suggests that a beach profile will automatically adjust to changes in wave energy to absorb that energy efficiently?
Correct Answer: a) Dynamic equilibrium
Explanation:
Dynamic equilibrium in coastal systems means that beaches continuously shift their shape (e.g., flattening during storms, steepening in calm weather) to balance and absorb the changing wave energy.
107. An offshore submerged ridge of sand running parallel to the coast is known as a:
Correct Answer: c) Longshore bar
Explanation:
A longshore bar (or offshore bar) is a linear ridge of sand built by wave action slightly offshore, often parallel to the beach, which helps to trip incoming waves.
108. A coastal landform where a river flows into a large standing body of water and deposits its sediment faster than the sea can remove it is a:
Correct Answer: c) Delta
Explanation:
A delta forms at the mouth of a river where it meets the sea. If river deposition outweighs coastal erosion (waves and tides), the delta progrades outward.
109. Which of the following is NOT a type of delta shape?
Correct Answer: d) Plunging
Explanation:
Arcuate (fan-shaped), bird's-foot (elongated), and cuspate (tooth-shaped) are the three main classifications of delta shapes. 'Plunging' refers to a type of breaking wave.
110. Which coastal ecosystem acts as the tropical equivalent of a temperate salt marsh, providing vital protection against storms?
Correct Answer: b) Mangrove forests
Explanation:
Mangrove forests thrive in intertidal zones of tropical and subtropical coastlines, serving the same ecological and protective functions as salt marshes in temperate zones.
111. Which process of coastal sediment transport involves medium-sized sand grains bouncing along the seabed?
Correct Answer: c) Saltation
Explanation:
Saltation is the process where wind or water currents pick up particles (like sand) and drop them in a bouncing or hopping motion along the surface.
112. Which sediment transport process involves large boulders being dragged or rolled along the sea floor?
Correct Answer: a) Traction
Explanation:
Traction is the movement of heavy rocks and boulders being rolled or dragged along the seabed because they are too heavy to be lifted into the water column.
113. When examining coastal cliff retreat, what is the role of 'sub-aerial' processes?
Correct Answer: b) They refer to the breakdown of the cliff top and face by weathering and mass movement
Explanation:
Sub-aerial (literally 'under the air') processes operate on the landward face of a cliff, including weathering (rain, frost) and mass movement, which work alongside marine erosion to cause cliff retreat.
