Coastal Processes

Waves are created by wind 

• True 
• False 

The "fetch" is the strength of the wind 

• true 
• false 

If a wave is constructive then the backwash is stronger than the swash 

• true 
• false 

Destructive waves are created in storm conditions

• True 
• False 

Constructive waves have a long wavelength, and are low in height and are created during calm weather conditions 

• true 
• false 

Hydraulic action is when air becomes trapped in joints and cracks on a cliff face and then a wave breaks, the trapped air is compressed which weakens the cliff and causes erosion.

• true 
• false 

Attrition is when acids contained in sea water will dissolve some types of rock such as chalk or limestone 

• true 
• false 

Continual swash and backwash transports material sideways along the coast. This movement of material is called longshore drift and occurs in a zigzag.

• true
• false 

These groups all have an interest in coastal processes: 
local residents
environmental groups
local councils
national governments
tourist boards

• True 
• False 

Sand is being dumped or removed?

• Removed 
• Dumped