Sea Defences Quiz

What is the primary function of a sea wall in coastal management?

• To attract tourists

• To absorb and reflect wave energy

• To increase the speed of waves

• To collect sand from the sea

Which material is commonly used to construct rock armour in coastal defenses?

• Plastic

• Sandstone

• Granite

• Wood

How do groynes primarily function to protect the coastline?

• By deflecting waves away from the shore

• By trapping sand transported by longshore drift

• By absorbing carbon dioxide

• By cooling the shoreline

What is the main goal of dune regeneration?

• To create habitats for marine life

• To build recreational areas

• To stabilize sand dunes and prevent erosion

• To increase rainfall in coastal areas

Beach replenishment is a process that involves:

• Removing sand from the beach

• Adding large boulders to the beach

• Adding sand to the beach from external sources

• Planting trees on the beach

Which of the following is NOT a benefit of a sea wall?

• Preventing coastal erosion

• Providing habitat for marine life

• Protecting inland areas from storm surges

• Reducing the impact of waves

Rock armour works by:

• Increasing the temperature of the coastal water

• Reflecting sunlight

• Dissolving in water

• Breaking the force of incoming waves

What is a potential disadvantage of using groynes?

• They can enhance the scenic beauty of the coastline

• They can cause down-drift erosion

• They can increase sand volume

• They can attract more wildlife

Dune regeneration often involves which of the following activities?

• Removing all vegetation from dunes

• Flattening the dunes to create more beach space

• Planting vegetation to stabilize the dunes

• Covering dunes with concrete

What is the primary reason for undertaking beach replenishment?

• To reduce the amount of sand on the beach

• To improve the aesthetic appeal of the beach

• To prevent beach erosion and maintain beach width

• To create areas for water sports