geography- coast Flashcards
how are waves formed
wind passing over the sea surface
what are destructive waves?
Destructive waves have a large wave height in short wavelengths. They have a high downward force and strong backwash. The strong download energy helps, avoid beach, material and cliffs.
What are constructive waves?
Constructive waves have a low frequency and swash is powerful. Backwash is weaker and it doesn’t take a lot of material back down to the coast which means material is deposited on the coast.
what is freeze thaw weathering
Freeze thaw weathering happens when the temperature hits freezing point.
Water gets into rock that has cracks,
When the water freezes and expands, it puts pressure on the rock.
When pressure releases on the rockfall., The rock breaks.
What is chemical weathering?
Chemical weathering is the breakdown of rocks by changing the chemical composition
what is mass movement?
Mass movement is the material falls down a slope
What is hydraulic power?
hydraulic power: waves crashing against the rock and compressed get into a crack. This puts pressure on the rock and overtime bits of the rock break.
what is abrasion?
Eroded particles in the water scrape from against a rock, removing a small pieces
What is attrition?
particles in the water smash into each other break into small fragments-rocks rub together and get rounded edges
name, the four types of mass movement
Rockfall, landslide, slumping, mudslide
how are coastal landforms formed?
waves cause most of version of the foot of a cliff, therefore, forming a wave cut notch, which is a large does a version continues
how are headlands formed?
Soft rocks with lots of joints have low resistant to Russian.
Hydroxide a solid structure, have a high resistance to erosion, the less resistant rock, or it’s quicker and forms obey.
The more resistant rock get to read it slower, leaving it out for me a headland.
what are beaches?
Beaches are made from eroded material that’s been transported from elsewhere as a deposit by the sea.
formed by constructive waves, depositing material like Sand
what are spits?
Spits form a sharp bend in the coastline.
Longshore drift, transport Sands pass the bend and deposited at the ccs.
The sheltered area behind the pit is protected from waves.
What are bars?
A bar is formed when a split joins two headlands together.

