The Sea Flashcards
How are waves formed
By wind
How does the size of the wave increase
With the strength of the wind and length of the sea(fetch) over its passes
What is Swash and what is back Swash
- frothy water rushing up the shore
* water running from the wave
Name the two types of waves
•2 points on how to occurs and diagram in hardback
Destructive
•occurs during stormy weather
• backwash stronger than Swash
•erosion occurs
Constructive
• occurs during calm weather
•Swash stronger than backswash
•deposition
Name the four types of erosion
Hydraulic action
Compressed air
Abrasion
Attrition
Explain the 4 types of erosion
1) Hydraulic Action: the water pounds against the coasts
2) compressed air: is trapped in cracks in the rock by incoming waves. Increases pressure on the rock. When waves move out they expand and shatter the rock
3) abrasion: when waves pick up rocks and stones hurling them against the coast.
4) attrition: when rocks and stones are carried by waves rubbing off each other.
Learn cliffs and bay headlands in hardbacks
How did you do
What is sea cave
Sea arch
Sea stack
Blowhole
A tunnel or passage in the rock at the foot of a cliff
A passage that runs through a headland
A pillar of rock that is cut of the headland or cliff
a passage that links the roof of a cave with the surface of the cliff top
What is longshore drift?
When the waves approach the shore at an angle
What is a beach?
Is a build of sand and shingle, does sited by waves between high and low tide levels
Explain how beaches are formed
- when waves break, the Swash carries its load of coarse and find material up the shore.
- the backwash is weaker and it drags some of the finer material.
- storm beaches are formed when the Swash is strong enough to hurl large stones.
Name two examples of beaches
Malaise, donabate, portrane
Diagram in book.
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What is a sand dune
Hills of sand that pile on shore
What is marram grass
Planted on sand dunes. Helps bind sand particles together
