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🗺️ || GCSE Geography - Paper 3
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Cards (64)
Name the 3 types of atmospheric hazards.
Atmospheric
Geomorphological
Flooding
Name 3 things that increase the likelihood of a natural hazard occurring.
Urbanisation
Agriculture
Climate change
What are the 5 processes at destructive plate margins.
The plates move
towards
each other
Composite
volcanoes
Fold
mountains
Earthquakes
Convection
currents
Define the 4 processes at constructive plate margins.
Move
away
from each other
Shield
volcanoes
Earthquakes
Convection
currents
Define the 2 processes at conservative plate margins.
Move
side
by
side
Earthquakes
How does ridge push work?
Magma rises
as the
plates
move apart
The
magma cools
to form a new
plate material
That
plate material
then slides away from the
ridge
Causes the
tectonic plates
to move
away
from each other
How does subduction/slab pull work?
The denser plate sinks back into the
mantle
due to
gravity.
How does a convection current work?
The
magma rises
due to the
hot core
and sinks back down towards the core after it has cooled.
Convection
builds up pressure so that the
plates
move too
What do constructive plates cause?
They
move apart
causing a new crust to form and causing
volcanic eruptions.
What do destructive plates cause?
They
collide
which can cause:
The formation of
fold mountains
Subduction
Earthquakes
Volcanic eruptions
How many tectonic plates is the earth's crust made up
of
?
Seven
Name the 2 properties of the oceanic crust.
Thin
Dense
Name the 2 properties of the continental crust.
Less
dense
Thicker
Define the term
abrasion.
Caused by
waves
picking up material which is forced against the
cliff face
wearing it away.
Define the term
attrition.
Where stones and
pebbles
in the sea knock against each other causing them to become
smoother
and rounded.
Define the term fetch.
The distance over which
wind
has blown to form a
wave.
Define the term
backwash.
The movement of
water
back down a
beach.
Define the term swash.
The movement of
water
up a
beach
Outline the main characteristics of constructive waves.
Smaller than 1 metre.
Low
energy
Low
frequency
Strong
swash,
weak
backwash
Deposition
Outline the main characteristics of destructive waves.
Higher
than 1 metre
High
energy
High
frequency
Weak
swash, strong backwash
Erosion
Define the term
hydraulic
action.
Waves break against the cliff face
pressure
of the breaking wave compresses air in the
cracks.
Breaks the rock apart
Define the term
slumping.
When
land mass
moves a short distance down the
slope.
Define the term
hard
engineering.
Involves the construction of man-made defences to control the natural processes, e.g.
groynes
+
sea wall
Define the term soft engineering.
Works with
natural
processes and considered more
environmentally
friendly.
Define the term rip rap.
Large resistant rocks
placed in front of the
cliff.
Advantages and disadvantages of rip rap.
Absorbs wave energy
Makes
beaches
inaccessible
Define the term
groynes.
Fences
built across the beach,
stretching
from the coastline into the sea.
Define the term beach replenishment.
The
addition
of
sand
taken from somewhere (generally offshore)
Define the term headland.
A
cliff
that sticks out into the
sea
Define the term bay.
A body of
water
partially surrounded by
land.
Define the term stack.
A
large
stack of rock in the
sea
Define the term
spit.
Beach landform
off coasts or
lake shores.
Define the term
longshore drift.
Where
materials
are brought along the
coastline.
Holderness coast
Spurn head
Define the term
arch.
A
wave-eroded
passage through a
headland.
Define the term
wave-cut notch.
An area of
erosion
at the base of a
cliff
formed by the waves. Formed by erosional erosional processes such as abrasion and hydraulic action
Define the term wave-cut platform.
A platform that has been eroded due to the collapse of the rock below the headland due to hydraulic action and abrasion
what do groynes prevent?
Longshore drift
Define the term
coastal bar.
A bar is created when there is a
gap
in the
coastland
with water in it.
Define the term
salt marsh.
Open
salt water
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