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Bjg Geo Test > The Sea > Flashcards

The Sea Flashcards

1
Q

Constructive waves

A

When the swash is greater than the backwash
Deposition

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2
Q

Destructive waves

A

When the backwash is greater than the swash
Erosin

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3
Q

Hydraulic action

A

The physical force of the waves breaks material off the coastline
During storm, waves r stronger nd their ability to erode increases

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4
Q

Abrasion

A

Loose material is thrown against the coastline by the waves
Breaks more material off the coastline

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5
Q

Comprehension

A

Waves crash again cliff, air gets trapped and becomes compressed. Waves retreat and pressure is released. This continues until rock shatters

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6
Q

Solution

A

Some rocks such as limestone and chalk are dissolved by water

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7
Q

Attrition

A

Stones in the water are hitting off each other. They become worn down, smooth and rounded

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8
Q

Bay

A

A curved area where the waves have eroded the coastline
Example: Dublin bay

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9
Q

Headline

A

An area of hard Rock jutting into the sea.
Example: bray head

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10
Q

Sea cliff

A

a vertical or steep slope on the coastline
Eg: cliffs of moher in co. Clare

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11
Q

Sea cave

A

A tunnel at the base of a cliff
Eg: caves at ballybunion in co.kerry

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12
Q

Sea arch

A

An arched shaped tunnel that stretches through a headland
Eg: dùn briste off Downpatrick head in co.mayo
Learn in detail

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13
Q

Blowhole

A

A passage that links the cliff top with the roof of a sea cave
Eg: the two pistols on the co.donegal coast

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14
Q

Features of coastel deposition

A

Beach
Sand dunes
Sand spit
Sand bar
Tomboala

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15
Q

Process of coastel erosin

A

Hydraulic action
Abrasion
Compression
Solution
Attrition

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16
Q

Coastel deposition

A

Waves deposit their load when they lose energy and can no longer transport such a large load

17
Q

Lagoon

A

A small lake that is formed behind the sand bar

18
Q

Tombolo

A

A narrow ridge of sand that joins an offshore island to the mainland

19
Q

Gyrones

A

Low walls often made of wood that are built at right angles to the coast
Eg. Roslare Co. Wexford

20
Q

Sea walls

A

A wall made of concrete built between the sea and the coastel town
Eg: galway bay

21
Q

Gabions

A

Wire cages that are filled with small stones placed along beaches
Eg: lahinch, co.clare

22
Q

Rock armour

A

Large boulders placed at the base of soft Rock areas of the coastline
Eg: lahinch Co. Clare

23
Q

Case study

A

Rosslare strand and rosslare Harbour co. Wexford

24
Q

Location of case study

A

The southeast coast
Serves as a major port and ferry terminal

25
Q

Coastel vulnerability of case study

A

Exsposed to the irish sea, making i5 susceptible to eroisin and storm surges

26
Q

Protective measures of case study

A

Installation of coastel defences
Nourishment projects to help eroded beaches

27
Q

Features of coastel eroisin

A

Headland
Sea cliff. Blowholes. Bays
Sea cave
Sea arch
Sea stack

Bjg Geo Test (8 decks)

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