In the 1860s Dr. Livingston was almost lost in Africa searching for the source of the River Nile. Why are river sources so difficult to find?
100%
The source of a river may be underground
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They have often been built over by later housing and industrial developments
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A river can have hundreds of tributaries. The source is the head of the tributary furthest away from the mouth of the river. Rivers like the Nile have tributaries over thousands of square miles all of which have to be measured to determine which is the furthest away
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They are very small and difficult to find in the landscape
Q.2.
In the Victorian era many rivers were culverted to hide the polluted waters and provide more land. What is a culvert?
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A tunnel carrying a stream, river or open drain
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A hole dug to send a river underground
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Where water has dissolved limestone and formed an underground channel
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A canal to divert water around cities and towns
Q.3.
River discharge is the amount of water flowing through a river channel. How is river discharge measured?
100%
Cubic meters per second (cumecs)
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Litres
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Pounds per square inch (PSI)
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Liters per hour
Q.4.
The water cycle is also known as what?
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The carbon cycle
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Precipitation
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Flooding
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The hydrological cycle
Q.5.
Rivers are surrounded by their drainage basins. What is a drainage basin?
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The area into which the water from the river drains into the groundwater
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The area in which cities discharge sewage and waste into a particular river
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The area of land drained by a river and its tributaries
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A valley between two mountain ranges
Q.6.
At its end the River Nile has numerous channels carrying water away from the main channel. What is the name given to this type of estuary?
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Mouth
100%
Delta
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Distributaries
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Convoluted
Q.7.
In physical geography how is the watershed defined?
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The imaginary line separating two drainage basins. This is normally a ridge of higher ground that divides two river valleys or other drainage basins
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A straight line drawn between two high peaks
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The area connecting two river sources
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A line created by connecting all the sources of a particular river
Q.8.
What is a freshwater river?
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Water held in one position for the purpose of water supply
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A body of water that is prone to floods and drought
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Anything larger than a stream, but smaller than a lake
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Water low in salt content flowing across the surface of the land, usually towards the sea
Q.9.
Tributaries and distributaries both carry water, but what is the key difference between these two types of channel and how they are defined?
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Tributaries flow into a river, carrying water into the main channel, whilst distributaries split off and carry water away from the main channel
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Tributaries only occur in the upper reaches of a river, whilst distributaries only occur in the lower reaches
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Tributaries are streams, whilst distributaries are rivers
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Tributaries are the erosive areas of a river system, whilst distributaries are the land building sections of the river system
Q.10.
Most cities in the world are located on the banks of a major river, such as London on the Thames, Paris on the Seine, and Nottingham on the Trent. Which of the following is a reason for cities to be built on the banks of a major river?
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Transport and shipping routes
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Farming on the flood plains
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The river could be used as protection against invading forces
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Reduced risk of flooding
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