Part 2 Landforms and exogenetic processes 2 Landforms and exogenetic processes © Oxford University Press 2006 Quit.
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Part 2
Landforms and exogenetic processes
2 Landforms and
exogenetic processes
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Part 2
Landforms and exogenetic processes
2.1 When will a river
appear?
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Part 2
Landforms and exogenetic processes
What are exogenetic processes?
Besides endogenetic
processes, are there any
other processes that shape
the earth?
Exogenetic
processes
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Landforms and exogenetic processes
What are exogenetic processes?
Let’s
Whattake
are
rivers
exogenetic
as an
processes?
example.
Exogenetic processes are
the processes generated
by agents, such as
rivers ______
wind and ____.
ice
_______,
They bring down
materials from mountains
which fill the valleys.
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Landforms and exogenetic processes
What are exogenetic processes?
The two main processes are:
Denudation
Weathering
Deposition
Mass wasting
Erosion
Transportation
Deposition
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Landforms and exogenetic processes
Before studying the exogenetic
processes that the river
produces, let’s see how water
moves on the earth!
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Landforms and exogenetic processes
In what ways does water move on our
earth?
Atmosphere
Evaporation
Where does the
Condensation
water mainly store
Evaporation
Evapotranspiration
on the earth?
Transpiration Precipitation
Precipitation
Soil/ rocks
Vegetation
Rivers/ lakes
Infiltration
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Ocean
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Landforms and exogenetic processes
In what ways does water move on our
earth?
Through the water cycle,
Let’s look at it in detail.
water moves on our earth.
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Landforms and exogenetic processes
In what ways does water move on our
earth?
Precipitation
Transpiration
Evaporation
Drip flow Stem flow
Interception by
vegetation
Saturated
rock
Impermeable rock
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Landforms and exogenetic processes
In what ways does water move on our
earth?
Precipitation
Evaporation
Overland
flow
Channel
flow
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Surface
run-off
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Landforms and exogenetic processes
In what ways does water move on our
earth?
Evaporation
Absorption
Surface
storage
Infiltration
Saturated
rock
Percolation
Ground water storage
Throughflow
Base flow
Subsurface
run-off
Impermeable rock
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Landforms and exogenetic processes
What can we find in a river basin?
Watershed
River
source
Tributary
Confluence
points
Main river
Mouth of the river
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River basin is an
area drained by a
main river with its
tributaries and
___________
_____________.
distributaries
Can
you identify
Its
boundary
is
different
known
as the
What
is a
features
in a
__________.
watershed
river basin?
river basin?
Distributaries
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Landforms and exogenetic processes
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1
Landforms and exogenetic processes
Denudation
Weathering
Rocks are weakened or broken down in the
moisture changing
original place because of _________,
____________
temperature and ________________.
living organisms
The broken rock pieces are called ____________.
rock debris
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1
Landforms and exogenetic processes
Denudation
Mass wasting
Weathered
materials
The debris is brought down slope by _______.
gravity
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Landforms and exogenetic processes
Denudation
Erosion
River
River
Loosened materials are removed.
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Landforms and exogenetic processes
1
Denudation
Transportation
Please click below to view footage
Look at the
Theyand
arethe
sand
carried
away
stones
bycarefully.
water to
other
areas!
What can
you
find from the
footage?
Weathered and eroded materials are carried
away to other areas.
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2
Landforms and exogenetic processes
Deposition
The eroded materials rest on the ground that
the river carries or on the _________.
river bed
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