Worksheets16.3 Shoreline Processes and Features
Total questions: 20
Worksheet time: 10mins
What is wave refraction?
The bending of waves as they approach the shore at an angle.
The reflection of waves back into the ocean.
The increase in wave height as they move into shallower water.
The breaking of waves on the shore.
Which of the following best describes a longshore current?
A current that moves parallel to the shore, caused by waves hitting the shore at an angle.
A current that moves directly away from the shore.
A current that moves directly towards the shore.
A current that circulates in the open ocean.
What is a barrier island?
A large rock formation in the ocean.
A narrow, sandy island that forms parallel to the coast.
A type of coral reef.
A submerged mountain range.
Explain how wave refraction affects the distribution of energy along a coastline.
It causes energy to be concentrated on headlands and dispersed in bays.
It causes energy to be evenly distributed along the coastline.
It causes energy to be concentrated in bays and dispersed on headlands.
It has no effect on the distribution of energy along a coastline.
How does a longshore current contribute to the formation of a spit?
By depositing sediment along the shore, extending the landform.
By eroding the shoreline and removing sediment.
By creating a circular current that traps sediment.
By increasing wave height and energy.
Describe the role of barrier islands in coastal protection.
They increase the speed of incoming waves.
They act as a buffer, absorbing wave energy and protecting the mainland.
They decrease the salinity of coastal waters.
They prevent the formation of longshore currents.
Analyze the impact of wave refraction on coastal erosion patterns.
Wave refraction can lead to increased erosion on headlands and decreased erosion in bays.
Wave refraction has no impact on coastal erosion patterns.
Wave refraction leads to uniform erosion along the coastline.
Wave refraction decreases erosion on headlands and increases it in bays.
Evaluate the potential effects of a disrupted longshore current on sediment transport.
Sediment transport would increase uniformly along the coast.
Sediment transport would decrease, leading to increased erosion in some areas.
Sediment transport would remain unchanged.
Sediment transport would become more efficient, reducing erosion.
Predict how the removal of a barrier island might affect the adjacent coastline.
The coastline would experience increased erosion and storm impact.
The coastline would become more stable and less prone to erosion.
The coastline would experience no significant changes.
The coastline would see a decrease in wave energy.
Which of the following is a direct result of wave refraction?
The formation of tidal waves.
The concentration of wave energy on headlands.
The creation of underwater volcanoes.
The increase in ocean salinity.
What process is primarily responsible for the movement of sand along a beach?
Tidal waves.
Longshore drift.
Ocean currents.
Wind erosion.
Discuss how human activities can alter longshore currents and their effects.
Construction of jetties and groins can disrupt natural sediment flow, leading to erosion.
Human activities have no impact on longshore currents.
Planting vegetation can increase the speed of longshore currents.
Building seawalls can enhance the natural flow of longshore currents.
How might climate change impact the stability of barrier islands?
Rising sea levels and increased storm intensity can lead to erosion and submersion.
Climate change will have no impact on barrier islands.
Barrier islands will become more stable due to increased sediment deposition.
Barrier islands will expand due to higher temperatures.
Propose a method to mitigate the effects of longshore drift on coastal erosion.
Constructing groins perpendicular to the shore to trap sand.
Removing all vegetation from the beach.
Increasing the angle of wave approach.
Allowing natural erosion to occur without intervention.
What is the primary cause of longshore drift?
Waves approaching the shore at an angle.
Tides rising and falling.
Ocean currents moving perpendicular to the shore.
Wind blowing parallel to the shore.
How can the construction of seawalls impact coastal erosion?
Seawalls have no impact on coastal erosion.
Seawalls can increase erosion by reflecting wave energy back to the beach.
Seawalls prevent erosion by absorbing wave energy.
Seawalls increase sediment deposition on the beach.
What role do dunes play in coastal protection?
Dunes decrease the salinity of coastal waters.
Dunes prevent the formation of barrier islands.
Dunes trap sediment and provide a barrier against storm surges.
Dunes increase the speed of longshore currents.
What are the potential consequences of constructing groins along a beach?
Groins prevent the formation of barrier islands.
Groins increase the speed of longshore currents.
Groins have no impact on sediment distribution.
Groins can trap sand and reduce erosion on one side while increasing it on the other.
How does the presence of a headland affect wave energy distribution?
Wave energy is concentrated on the headland, leading to increased erosion.
Wave energy is evenly distributed along the coastline.
Wave energy is reduced on the headland, leading to sediment deposition.
Wave energy is unaffected by the presence of a headland.
What is the primary function of a breakwater in coastal management?
To increase the salinity of coastal waters.
To enhance the speed of longshore currents.
To protect the coastline by reducing wave energy and preventing erosion.
To increase wave energy reaching the shore.
