The Sea Flashcards
What does the size of the wave depend on
The strength of the wind
The length of the sea (FETCH)
What are the 2 types of waves
SWASH
BACKWASH
What is the SWASH
As the wave reaches the shore it breaks. This is the SWASH
It is the white foamy water that flows UP towards the beach
What is he backwash
The back was is the water that runs out of speed then flows back towards TYE SEA
What are constructive waves
COMPOSITION
Strong SWASH- transports and deposits material on beach
WEAK BACKWASH- does not carry much material back to sea
As a result they construct/add material to the beach
DIAGRAM
Destructive waves
COMPOSITION
WEAK SWASH
VERY STRONG BACKWASH- wears away and carries away material from beach
Therefore there is a lot of erosion and they destroy/destruct the coastline
Sea erosion
Hydraulic action
Air compression
Abrasion
Attrition
Hydraulic action
This is the power of the water hitting the coastline
Air compression
The waves trap air in cracks in the rocks. As the waves retreat the trapped air expands quickly and can crack the rock
Abrasion
This is when small rocks carried in the seas load are hitting against the coastline
Attrition
This is when small stones carried in the seas load are hitting against each other breaking themselves into smaller pieces
Landforms of sea erosion
Cliffs
Bays and headlands
Sea caves, sea arch,sea stack,sea stump
Blowhole
What does the sea carry in its load
Sand
Pebbles
Stones
Mud
Landforms of sea deposition
Beaches Sand dunes Sand spits Tombolo Lagoons
How are waves made up
Waves are made up because of the friction between the wind and the surface of he sea
What does the sea provide us with
EXPLAINQ
The sea provides us with many things
For example it provides us with energy such as wind and tidal energy. This energy is renewable and good for the planet. It can also provide us with energy such as gas and oil which isn’t renewable and not great for the planet
It can provide us with leisure. For example water sports such as sailing and other leisure activities such as having a picnic and sunbathing
It can be a good transport route to transport people and goods. For example ferries can sail over the sea with passengers and cargo ships can sail over the sea to transport manufacturing goods easily and cheaply
Another thing the sea provides us with is food such as fish and crabs.
What are the negative effects of what the sea proviðs us with
The non renewable energy that we use from the sea will eventually run out and it also can cause pollution
When on the beach people having picnics/sunbathing could leave behind rubbish creating not only an eye-sore but can also cause pollution
The sea provides us with food but this food will eventually run out if fish stocks are not managed properly. To prove that this there is conservation boxes which people cannot fish in
Ships transporting goods can pollute the sea by oil spillage s that can also deflect fish stock
S
What have people made to control the power of the sea
Gabions
Sea walls
Groynes
Boulders
