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Description
Flashcards by Farha Idrees, updated more than 1 year ago
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Created by Farha Idrees
over 8 years ago
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| Question | Answer |
| Where is energy generated? | Energy is usually generated in power stations which burn fossil fuels. |
| What does a power station do? | They all work the same way by burning fossil fuels and converting this energy into electricity. The electricity is then taken to where it is needed. |
| What are the main things that happen in a power station? (7) | 1. The fuel is supplied to the power station 2. Then it is burnt in a furnace 3. The heat given out is used to heat water and turn it into steam 4. The steam is then piped to a turbine where it forces the turbine blades to turn 5. The turbine is connected to a shaft that drives a generator 6. The generator produces electricity 7. The steam used to drive the turbine condenses back into water as it cools and is recycled back to the boiler and reused. |
| Watch this video as it explains how electricity is made and sent to our homes :D | https://www.youtube.com/watch?v=20Vb6hlLQSg |
| What are the energy transfers in a power station? | |
| Give an example on why using a power station is not the most efficient method. | -at least 60% of the energy stored in the fuel is lost as heat |
| What are some problems with burning fossil fuels in power stations? | -they produce carbon dioxide which leads to global warming -they also produce sulphur dioxide which causes acid rain -transporting fuels to the power station causes transport -large quantities of water is used in the process -when coal is burnt, a lot of ash is produced |
| What are the two main problems with using fossil fuels? | 1. The supply of these fuels will eventually run out 2. It causes pollutions of the water and air. |
| What problem does- a) carbon dioxide b) sulphur dioxide c) soot and tiny particles d) other chemicals -cause? | a) global warming b) acid rain c) -breathing problems -deposited on buildings -blocks air filters d) -breathing problems -allergies -smog |
| Fill in the gaps: Burning _____ _____ releases huge amounts of _______ into the ________. | Burning [fossil fuels] releases huge amounts of [pollutants] into the [atmosphere]. |
| As oil is used in such large amounts and often has to be transported over large distances, what are the two main things that can go wrong? | 1. Pipelines can leak or be destroyed 2. Tankers can sink releasing large amounts of highly polluting crude oil into the sea. |
| What are renewable energy resources? | Renewable energy resources are energy resources that will not run out. |
| How does hydroelectric power? | It uses the energy from the falling water to turn generators that collect water. |
| What are the main types of renewable energy? (7) | -wind -wave -wind -tidal -geothermal -solar -bio-fuel |
| What are the problems with renewable energy sources? | -These sources can only contribute a small amount to our total energy needs. -The sites are inaccessible which makes maintenance difficult -Most of theses sources only generate electricity when the conditions are right. |
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