Term
| C- What does the cost of heating the home depends on? |
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Definition
| Fuel used, tariffs, installation charges and the period of use |
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Term
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Definition
| By conduction, convection and radiation |
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Term
| C- How can energy loss be prevented? |
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Definition
| Using an insulation material which traps a static layer of air |
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Term
| C- Which factors affect the cost-effectiveness of remedies for energy loss/waste |
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Definition
| Running costs, installation charges and the period of use |
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Term
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Definition
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Term
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Definition
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Term
| Plug: yellow and green cable is |
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Definition
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Term
| What are fuses and earth wires for? |
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Definition
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Term
| C- Appliance with power rating up to 720W needs which fuse? |
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Definition
|
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Term
| C- Appliance with power rating from 720W to 3000W needs which fuse? |
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Definition
|
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Term
| C-Where is the fuse and switch in an appliance? |
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Definition
|
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Term
| C-What is the Earth wire? |
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Definition
| Safety device connected to the metal parts of the appliance |
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Term
| C-How can you detect oil and gas reserves? |
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Definition
| Aerial photography, anomalies of gravity, geological survey, seismic survey and test drilling |
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Term
| C-How do you extract coal? |
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Definition
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Term
| C-How do you extract gas and oil? |
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Definition
| Drilling, it is easier because they are under pressure |
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Term
| C- How do separate the different fractions of crude oil? |
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Definition
| Different fractions boil and condense at differen temperatures |
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Term
| C- What happens when fuels burn with not enough oxygen available? |
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Definition
| Carbon monoxide (poisonous) is produced. If the temperature is high enough, oxides of nitrogen may also be formed. |
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Term
| C-What are the problems for the environment due to the burning of fossil fuels? |
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Definition
| Greenhouse effect, arctic winter |
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Term
| C-How current is produced by a generator? |
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Definition
| A magnet rotates (i.e. spin) inside coils of wire |
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Term
| C-What does the current depend on? |
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Definition
| Strength of magnet and speed at which it is turning |
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Term
| How can we use nuclear fuel to produce electricity? |
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Definition
| Nuclear fuels produce heat which produces the steam needed to drive the turbine. The turbine drives the generator and that produces electiricy |
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Term
| What is the dangerous thing produced by nuclear power stations? |
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Definition
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Term
| C- What is the half-life of radioactive material? |
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Definition
| Time taken for material to lose half of its radioactivity. |
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Term
| Examples of renewable sources of energy |
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Definition
| Waves, sun, wind, hydroelectric |
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Term
| C- Other examples of renewable sources of energy? |
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Definition
| Sugar alcohol, geothermal heat |
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Term
| C- How is energy produced from sugar? |
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Definition
| Sugar is fermented into alcohol which can be used as a fuel. |
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Term
| C- How can we obtain geothermal energy? |
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Definition
| Cold water is pumped down a hot rock layer. Water is heated and forms steam which can be used to produce electricty or heat up houses. |
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Term
| C-Disadvantages of renewable sources of energy? |
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Definition
| Cost, technology involved, visual pollution, reliability of energy sources. |
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