Sea Erosion Quiz

What is coastal erosion?

• The movement of water away from the coastline due to natural forces.

• The removal or displacement of land, rocks, or sediment along the coastline due to natural forces.

• The formation of new beaches and dunes along the coastline.

• The process of adding land, rocks, or sediment along the coastline due to natural forces.

Name one factor that contributes to beach erosion.

• Coastal development

• Wind erosion

• Tidal currents

• Wave action

What is cliff erosion?

• The sudden collapse of a cliff due to human activity.

• The growth of vegetation on a cliff surface.

• The gradual wearing away or removal of rock or soil from a cliff due to natural processes.

• The formation of a cliff through the accumulation of sediment.

Which type of erosion is caused by the action of waves?

• wind erosion

• coastal erosion

• glacial erosion

• river erosion

How does coastal erosion affect coastal communities?

• Coastal erosion has no impact on coastal communities.

• Coastal erosion only affects the natural environment, not the communities.

• Coastal erosion can lead to the loss of land and property, damage to infrastructure, displacement of people, and economic impacts.

• Coastal erosion can actually benefit coastal communities by creating new landforms.

What are some human activities that can accelerate beach erosion?

• Construction of seawalls, jetties, and groins; dredging of sand for beach nourishment; and excessive sand mining.

• Promoting sustainable fishing practices and protecting coral reefs.

• Reducing pollution and controlling coastal development.

• Planting vegetation on the beach, building sand dunes, and implementing beach nourishment projects.

What are the main causes of cliff erosion?

• Plant growth, gravity, and earthquakes.

• Chemical reactions, ocean currents, and volcanic activity.

• Weathering, wave action, and human activities.

• Tectonic activity, sedimentation, and wind erosion.

Explain the process of longshore drift and its role in coastal erosion.

• Longshore drift plays a significant role in coastal erosion as it transports sediment along the coastline, leading to the removal of material from some areas and deposition in others. This process can result in the erosion of beaches, cliffs, and other coastal features.

• Longshore drift has no role in coastal erosion.

• Longshore drift only transports sediment away from the coastline.

• Longshore drift is a process that adds material to coastal areas, preventing erosion.

What are some natural defenses against coastal erosion?

• Beach nourishment, seawalls, groynes.

• Oil spills, pollution, overfishing.

• Sand dunes, vegetation, coral reefs

• Rock walls, concrete barriers, steel sheet piles.

Describe the impact of climate change on sea erosion.

• Climate change has no impact on sea erosion.

• Climate change can lead to decreased erosion of coastal areas.

• Climate change can lead to increased erosion of coastal areas due to sea level rise and more intense coastal storms.

• Climate change only affects inland erosion, not sea erosion.