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WorksheetsRivers
Total questions: 70
Worksheet time: 53mins
The total area drained by a river and its tributaries is refered to as......
a drainage area
a water shed
a drainage valley
a drainage basin
The place where the river flows into the sea or large lake is called the ___________.
source
tributaries
mouth
drainage basin
Deposition is a process by which a river
dissolves sediment
Breaks down rock to form sedimenb
removes sediment from land forms
drops sediment to form landforms
What landform can you see in the picture?
River meander
V Shaped Valley
Floodplain
Waterfall
Which landform can be seen in the photo?
Waterfall
Estuary
Inter-locking Spur
Meander
What landform can you see in this picture?
Waterfall
V Shaped Valley
Meander
Ox-bow lake
What is the deep water called beneath a waterfall?
Plunge bath
Gorge
Plunge pool
Pool
What landform can you see in the picture?
Meanders
Rapids
Estuary
interlocking spur
What is the land next to the river called and how would you describe it?
Floodplain, steep land next to the river.
Floodplain, flat land next to the river.
Floodplain, flat land away from the river.
Floodplain, flat land on top of the river.
Where would you find a waterfall?
Upper course
Middle Course
Lower Course
Lowest Course
Rocks rolled along the river bed is what type of transportation?
When rocks scrape along the river bank and bed is what type of erosion?
What do we call the process where the water filters into the ground and into the tiny pores in the soil?
Dilusion
The movement of water through rock underground is known as..?
The place where a smaller river joins the main stream.
The area of land that gets flooded when the river overflows is known as the.....
Rivers that have water throughout the year are called_______________.
Seasonal river
Perennial river
Biennial river
none of these
A triangle-shaped landform formed where a river flows into the sea is called____________.
Island
Tributary
Delta
Distributary
Waterfalls and rapids are characteristic of a river in .......
the upper course
the middle course
the flood plain
the lower course
The high ground around a river basin which separates it from another basin is called the ...
Catchment
rocks in the river load smash against each other.
minerals in the rock dissolve.
Deposition occurs when ...
Material is moved along the river.
Material is dropped on the river bed.
Material is suspended in the water.
Material flows into the ocean.
Silting is an example of river deposition. explain what is meant by the term silting?
What is erosion in rivers?
When rivers wear away their bed/banks into smaller pieces
When rivers create new channels by forcing through rocks
When rivers drops the material that it is carrying.
When rivers break their banks to wet the ground beside them
What is transportation in rivers?
When rivers erode material from their banks and bed
When rivers create their own material to transport downstream
When rivers move material downstream from its source to its mouth
When rivers move material upstream from its mouth to its source
What is the name given to the process whereby the material transported by the river smashes gainst itself?
Abrasion
Erosion
Solution
Attrition
From the options below, select when traction in rivers most likely to occur?
in low velocity
When the river is calm
At times of flooding
When the wind is blowing
What is solution in rivers?
When material is produced in the river
When material is dissolved in the river
When material bounces out of the river
When material is lifted out of the river
The lowest level to which a river can erode is known as .....
base level
ground level
water table level
stationary level
When water flows in layer in a river we refer to it as......
turbulent flow
white water flow
laminar flow
surface tension flow.
Which of the flowing does NOT usually effect infiltration rates?
soil moisture content
slope gradient
the PH of the rainfall
type of rain
Small particles such as sand and silt are usually transported:
in solution
in suspension
by saltation
by traction
Which is NOT a method of erosion?
Attrition
Abrasion
Traction
Hydraulic power
Deposition is caused by...
Moving water losing energy.
Particles in the water being too small.
An increase in river velocity.
Particles rubbing against the bed and banks.
Erosion occurs on the _________ bend of meanders.
outer
inner
lateral
vertical
The steeper the slope, the ________ the velocity of the stream.
Slower
Broader
Faster
Curvier
On a meander, the fastest flowing part of the river is...
the outside bend
the inside bend
the left hand side
the middle
What feature is being described here? The inside bank of a meander on a river where sedimentary material is deposited as a result of the slower flow rate
Overhang
River cliff
Slip-off slope
Meander
Infiltration will occur more quickly when ...
the ground is saturated
the gradient is gentle
the is sparse vegetation
the rainfall is heavy
Run off is more likely to occur when ...
the ground is unsaturated
the gradient is gentle
there is sparse vegetation
the rainfall is gentle
The amount of water passing a point in a river in a certain period of time is called ...
base flow
discharge
permanent flow
periodic flow
This hydrograph represents a ...
periodic river in Gauteng
permanent river in south Western Cape
periodic river in a winter rainfall area
permanent river in a summer rainfall area
Water that flows in layers in a river channel is known as.....
rapid flow
laminar flow
turbulent flow
layer flow
Turbulent flow occurs when a river flows ....
over a smooth river bed
through a lake
through a meander
over an uneven rock surface
Which of the following is a characteristic of a river in the lower stage.
Deposition
Rapids
Steep V shaped valley
Lateral erosion
River discharge provided by groundwater seeping into the bed of the river is called
surface run off
baseflow
throughflow
infiltration
Which of the following does not result in a high infiltration rate?
Steep gradient
Porous rock
Soft soaking rain
Low soil moisture content
Lateral erosion results in the....
deepening of a rivers channel
shortening of a rivers channel
widening of a rivers channel
thinning of a rivers channel
The lower course of the river has...
mostly erosion landforms
mostly erosion and deposition landforms
no landforms
mostly deposition landforms
Which of the following definitions describes deposition?
The dumping of bedload being transported in the river
The gradual wearing away of sediment over time
The way in which the river picks up sediment and transports it down the river
The removal of sediment from the river
In stream order a 1st Order and a 2nd order river meeting results in the formation of a ....
1st order stream
2nd order stream
3rd order stream
4th order stream
In stream ordering two 3rd order stream meeting results in the formation of a ......
3rd order stream
6th order stream
4th order stream
2nd order stream
Horizontal rock layers of uniform resistance to erosion results in the formation of a ___________________ drainage pattern
trellis
rectangular
dendritic
parallel
Folded rock of varying resistance to erosion results in the formation of a________________ drainage pattern.
trellis
rectangular
dendritic
centrafugal
The time between the peak rainfall and the peak flow on a hydrograph is refered to as a the .............
time difference
time differential
time lag
time base
The water the feeds into a river from the ground water is know as the ......
base flow
bed flow
ground flow
surface flow.
The lowest level to which a river can erode is known as the ........
base flow
base erosion
base level
ground base
A river with a smooth concave profile between the source and the mouth is said to be in a ......................... state
level
even
graded
balanced
A high drainage density is indicative of ...........
steep gradient and non-porous rock
gentle gradient and non-porous rock
steep gradient and porous rock
gentle gradient and porous rock
A circular drainage basin will result in a a hydrograph which ...........
slowly reaches a low peak
which rapidly reaches a low peak
which slowly reaches a high peak
which rapidly reaches a high peak.
An elongated drainage basin will result in a hydrograph which
has a low peak which is slowly reached
has a high peak which is rapidly reached
has a high peak which is slowly reached
has a low peak which is rapidly reached
On a meander the.......
inside of the bend is known as the slipoff slope and the outside the undercut slope
inside of the bend is known as the slipover slope and the outside the undercurrent slope
inside of the bend is known as the undercut slope and the outside the slipoff slope
inside of the bend is known as the uppercut slope and the outside the slipover slope
