WorksheetsRiver Chapter 6.1-6.9
Total questions: 50
Worksheet time: 9mins
River is water that flows_______ in a river bed or river channel.
uphill
downhill
A flowing body of water that is smaller than a river is called a ______, creek, or brook.
sea
stream
lake
ocean
Rivers flow year-round, some overflow during m__s__n seasons.
(a)
The longest river in the world is River N (a) e.
River is important as it can shape the landscape.
True
False
River supplies us with (a) to drink and support the lives of plants and animals.
River __________ is the place where a river begins or starting point.
source
mouth
Many rivers start in m__n___n or hills.
(a)
River ________ is where water flows into a larger body of water or ending point.
source
mouth
Ending point of a river:
lake / sea / o (a) n
Most of the natural river water is colourful.
True
False
If there are more algae in the water, the river looks (a) .
Water looks (a) when containing more calcium carbonate.
Scientist who studies how water flows across the land is called ___________.
demographer
hydrologist
The coverage of water flows from source to mouth
drainage basin
watershed
The boundary of a drainage basin nearby to the highland or mountains to catch the water
drainage basin
watershed
Physical weathering includes freezing (ice) or wind or water breaks up the rock into smaller pieces.
True
False
Broken rocks in river will be eroded, transported and finally deposited in a new spot to form a river landform, this whole process is called fluvial process.
True
False
The river channel is filled with bits of rock and finer material, which is called b__l__d.
(a)
Mainly, there are 40 ways that the river erodes.
True
False
The first erosion process: a___s__n
when the material being carried by the river hit the sides and bed of the channel.
(a)
The second erosion process: a_tri (a) n
when the rocks and stones in the river bang against each other, they break away from a surface in small and flat pieces.
The third erosion process: hy____lic ac___n
when the force of the water pushes into cracks in the rock at the bed and banks, chipping bits off the rock.
(a)
The fourth erosion process: co (a) si_n
includes the rocks dissolved in the rivers
Bottom of river
river channel
river bank
side of river
river channel
river bank
The river can transport ____ material if flowing fast across a steep gradient.
more
less
A river can carry more bedloads after heavy rainfall where there is greater volume of water in the channel.
True
False
__________ happens when the gradient of the river or the volume of water decreases
Erosion
Deposition
Liquid _______ is the major agent of erosion on Earth.
water
oil
E__s__n:
the wearing away of the banks and bed of the river by the power of the flowing water in the channel. Losing some lands/soils/muds/landforms
(a)
b (a) load
The river channel is filled with bits of rock and finer material.
c (a) rse
The path of a river flowing downhill.
Three courses of a river : upper, middle, lower
True
False
A line graph drawn across the river valley at intervals which displays the slopes across the valley.
long profile
cross profile
A line graph drawn along the river gradient which displays the river channel slope from source to mouth.
long profile
cross profile
In the upper course, a river with fast-flowing water has energy and power to deepen and widen the river channel at the valley. Energy comes from the source where water flows down a steep gradient. Erosion happens and it erodes downwards to the lowland.
v-shaped valley
interlocking spurs
Highland that connects from either side of a v-shaped valley. It is formed by the detachment of river bedloads. River itself doesn’t have the power to cut through hills but wind does. Wind causes weathering and erosion, leaving a spur of green land extending up from the valley side.
v-shaped valley
interlocking spurs
_______________ formed at a steep drop in a river’s long profile.
waterfall
ox-bow lake
Waterfall locates nearby upper to middle course where a river flows across a mountain between two different rock types. To be precise, the 'A' rock lies over a 'B' rock.
A: harder B: softer
A: softer B: harder
bends in the lower course of a river
valley
meanders
Outside of the bend, water is deeper, flows faster, the river erodes the neck, forms a _________.
river cliff
slip-off slope
Inside the bend, water is shallower, flows slower, river deposit bedloads, forms a gentle _________.
river cliff
slip-off slope
Erosion occurs at river banks, forming a wide flat valley called a flood plain.
True
False
When the loop of a meander bend becomes extreme, two eroded river banks can meet at a narrow neck or upland. Eventually the channel cuts through leaving the meander loop separated,
v-shaped valley
interlocking spurs
ox-bow lake
waterfall
a barrier that restricts the flow of surface water: d_m
(a)
an enlarged lake behind a dam to store fresh water: re (a) voir
A dam can prevent river fl (a) ding to happen.
Defo (a) ation is a human activity that can cause flooding.
Tree is important in prevention of flood due to tree r (a) absorbs rainwater, reduces the erosion and waterflow.
