Generating Electricity Flashcards
Power stations that burn coal release sulphur dioxide into the atmosphere. What environmental problem does this cause?
Acid rain
Power stations that burn coal release sulphur dioxide into the atmosphere. How can this problem be reduced?
.remove sulphur from the coal before it is burnt .reduce the SO2 in the smoke before releasing it into the atmosphere
What are the main advantages of generating electricity by using the renewable resources, such as wind, Sun, waves and hydro-electric?
No pollution Never run out No fuel costs
Power stations that burn coal release sulphur dioxide into the atmosphere. What are the disadvantages of using these energy sources?
.Depend on the weather - output is unreliable .Don’t produce much electricity unless used in very large numbers .Take up large areas of land or water
A remote cottage uses a wind turbine to generate all its electricity. Suggest 2 reasons why this is a good idea.
.energy is free .clean / non-polluting .renewable .saves fossil fuels
A remote cottage uses a wind turbine to generate all its electricity. Write down two possible problems of using this wind turbine.
.no power when there is no wind .no means of increasing the power .need batteries to store the energy which is not used
A remote cottage uses a wind turbine to generate all its electricity. A Wind Farm contains a number of wind turbines which produce electricity for the National Grid. What is the National Grid?
Network of Cables which take electricity from Power Stations to where it is needed. It covers the whole country
Some people object to wind farms. Suggest reasons why.
.spoil the view .lots have to be built, so they cover a large area .expensive to build .noise pollution .kills birds which fly into them
The diagram shows how electricity can be generated and transmitted across the country.
The red section on the left of the diagram represents an energy source. Name one fossil fuel that could be used for this.
Coal, oil or gas
The diagram shows how electricity can be generated and transmitted across the country.
Name one non-fossil fuel that could be used as the energy source.
Uranium (nuclear power)
The diagram shows how electricity can be generated and transmitted across the country.
What is the purpose of the turbine?
To spin / rotate when high pressure steam hits it. It produces the rotational motion needed for the next stage
The diagram shows how electricity can be generated and transmitted across the country.
What are the principle energy changes that take place in the generator?
Kinetic energy is turned into electrical energy
The output from the generator is fed into a transformer and the voltage increased considerably. Why is this stage necessary?
High voltage means low current and therefore less energy wasted in transmission. It is more efficient
In some countries hot volcanic rocks cause steam to burst out of the ground. What is the name given to this type of energy source?
Geothermal energy
