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Hydroelectric Power
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Hydroelectric Power

This Geography quiz is called 'Hydroelectric Power' and it has been written by teachers to help you if you are studying the subject at high school. Playing educational quizzes is a user-friendly way to learn if you are in the 9th or 10th grade - aged 14 to 16.

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Hydroelectric power is a topic that you study in relation to several sections of your geography high school syllabus and also in different subjects, for example science. You need to know about it in the context of land use (e.g. how we use fold mountains), renewable energy sources and also the hydrological cycle (e.g. dam building). It is useful to know and understand the factors that influence the siting of hydroelectric power plants and the conflicts these schemes create as well as the basics of how it works.

1.
Which of the following statements about hydroelectric power is true?
It is a renewable source of energy
It is very cheap and easy to set up
It is a non-renewable source of energy
Hydroelectric schemes are never built in mountainous areas
Hydroelectric scheme dams are expensive to build. Water is a renewable resource and mountainous areas are excellent places for hydroelectric schemes
2.
Which of the following is not a valid socio-economic disadvantage of building a large hydroelectric scheme in the mountains of Scotland?
Farming land is flooded
People need to be re-housed because their homes will be flooded by the new reservoir
Transportation of materials to the construction site
Shopkeepers will have fewer customers
When farmland is flooded, farmers need compensation for their loss of income. Where communities are lost because they will be underwater when the dam is full, the people need to be given new homes to live in. Getting the materials to a remote mountain location is costly
3.
Why are hydroelectric power schemes usually sited in the upper course of rivers?
Greater rainfall
Wider and deeper valleys than lower down
In order to avoid environmental damage
It is a lot cheaper
There are other reasons too like the narrow deep valleys mean that narrow dams can store a lot of water but are cheaper to build
4.
Which of the following is a good reason for building a hydroelectric power dam?
It creates a water reserve as well as generating electricity
This form of electricity generation does not produce greenhouse gasses
This form of electricity generation does not produce acidic gasses
All of the above
No fuel is burnt to generate the electricity so no polluting gasses are emitted
5.
Although hydroelectric dams flood large areas of the countryside, reducing the amount of farmland, they can also bring long-term economic benefits to the local economy. How?
Tourism
Heavy industry is attracted by cheap and plentiful electricity
Forestry
Construction jobs
They can be used for water sports and fishing. The surrounding hillsides can be developed to provide paths for walkers and tracks for mountain bikers and other cyclists. Construction jobs are only temporary whilst the dam and power station are being built
6.
Hydroelectric dams can be used to control ...
the army
the flow of water upstream from the dam
the flow of water downstream from the dam
the population of an environmentally-sensitive area
Water can be released in a predictable way which can ensure that there is a constant flow below the dam. This can help local communities downstream by reducing the likelihood of flooding
7.
What is the name of the device that turns the generators to make electricity?
A turbot
A tube
A turban
A turbine
This is linked to a generator via a gearbox
8.
Where does the electricity from most hydroelectric schemes go?
Directly to nearby towns
Only to local homes
Into the National Grid
Only to factories that produce aluminum
Hydroelectric power stations can be started up very quickly to put extra electricity into the National Grid when electricity demand is high
9.
Which of the following is an environmental problem that is associated with hydroelectric power?
Greenhouse gas emission during electricity generation
Carbon particles entering the atmosphere
Building access roads to construct the dam
Acid rain
The access roads require aggregates which has to be quarried and transported to make the road. The road destroys wildlife habitat and can disturb the flow of surface water
10.
In China, the Three Gorges Dam on the Yangtze river is the largest hydroelectric power station in the world and caused great controversy before it was built. Which of the following is the least likely to be a reason that some people did not want it to be built?
Some important archeological and cultural sites would be destroyed
Over a million people would need to be re-homed
It could reduce greenhouse gas emissions by about one hundred million tons in a year
Destruction of habitat critical to some highly-endangered species
The building of the dam has lead to the extinction of a river dolphin that was only found in the Yangtze
Author:  Kev Woodward

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