Syste,s And Processes Flashcards

1
Q

How is wind formed

A

Air rises in low pressure area which draws air in from high pressure areas causing constant movement of air as wind.

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2
Q

How are waves formed

A

Wind blows over the sea surface moving the water

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3
Q

How are waves formed in shallow water

A

Friction with sea bed slows down base of wave as the crest rises and steepens whilst moving forward making a elliptical orbit

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4
Q

How does fetch influence waves

A

The longer the fetch the more wind energy

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5
Q

What is wave period and frequency

A

The Tim in seconds between two crests

Number of waves per minute

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6
Q

Define swans and backwash

A

Rush of water up a beach

Water receding back down the beach

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7
Q

What are constructive waves

A

Strong swash weak backwash material deposited

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8
Q

What are the four zones of a coastline

A

Back shore- between high water mark and end of marine activity
Foreshore- are between high and low water mark
Inshore- area between low water mark and where waves have no influence on land
Offshore- area beyond where waves have no influence on land

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