Coastal Defences Quiz

What are the two ways in which people living on the coast are at risk from the sea?

• Flooding and erosion

• Drought and erosion

What is the typical cost per metre for a sea wall?

• £6000

• £2000

• £3000

• £500

Which method involves building a structure out at sea to make the waves break earlier, away from the beach?

• Wooden revetment

• Artificial reef

• Rock armour

• Sea wall

What is the purpose of groynes in coastal defences?

• To stop sand being carried away

• To reflect the waves away

What is the biggest problem for existing coastal defences according to the textbook?

• Severe storms

• Climate change

• Limited government funding

• Rising sea levels

Where does the money for coastal defences come from?

• Private investors

• The government

What is the purpose of rock armour in coastal defences?

• To reflect the waves away

• To soak up the waves' energy

• To stop sand being carried away

What is the impact of climate change on existing coastal defences?

• They will fail eventually

• They will become more effective

Identify the coastal defense feature.

• Sea wall

• groyne

Identify the coastal defense feature.

• revetment

• sea wall

• groyne