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26 Cards in this Set
- Front
- Back
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Name nine types of energy
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Thermal
GPE Nuclear KE Elastic Potential Light Electrical Sound |
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In a Sankey Diagram, what does the width of the lines show?
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How much energy is used.
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What is the equation for efficiency?
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output/input
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What is the law of the conservation of energy?
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The same amount after transfer as before. Energy cannot be created or destroyed.
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What does insulation do?
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Reduces energy transfers
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How do you insulate against radiation?
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Shiny surfaces reflect the heat
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How do you insulate against convection?
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Materials containing trapped air. Eg. bubble wrap and tea cosy.
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How do you insulate against conduction?
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Double glazing
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What is radiation?
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Wave of thermal energy (infra-red) which doesnt need atoms.
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What is convection?
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Where atoms with energy rise to cooler air. The heat doesn't move
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What is conduction?
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Atoms transfer energy from atom to atom but the material doesn't move. Metals are good conductors.
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Name 9 energy resources.
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Hydroelectric
Nuclear Geothermal Coal Biomass Wind Sun Waves Oil |
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2 Advantages of wind power?
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Land can still be used
Can supply electricity to remote areas |
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3 disadvantages of wind power
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Not always windy
Each turbine produces small amount of electricity Unsightly and noisy |
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1 advantages of wave power
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Can produce alot of energy
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2 disadvantages of wave power
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Only works with big waves
Big distances needed |
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2 advantages of solar power
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Needs no fuel
Produces no waste |
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2 disadvantages of solar power
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Doesn't produce alot of electricity
Only works at night (?) |
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1 advantage of hydroelectric power
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Available 24 hours a day
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2 disadvantages of hydroelectric power
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Floods land
Difficult to find a suitable site |
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1 advantage of fossil fuels
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Concentrated energy source
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2 disadvantages of fossil fuels
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Polluting
Non renewable |
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1 disadvantage of nuclear power
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radioactive waste
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1 advantage of nuclear power
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Highly concentrated source
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2 advantages of geothermal power
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Not weather dependant
Doesnt take up much space |
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2 disadvantages of geothermal power
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Not many sites
Brings hazardous materials to the surface |
