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31 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Non renewable energy |
Can not easily be replaced / will run out |
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Renewable energy |
Can be replaced in a short time |
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Why do we burn fuels |
To create energy |
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Non renewable energy examples and positives. |
Coal, oil, natural gas, nuclear power
Easy to make energy from, releases more energy and already have the infrastructure |
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Renewable energy disadvantages |
Expensive, weather and climate dependant, takes up land and disturbs wildlife. |
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the sun is the source of all energy in our solar system |
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What is a Direct Current |
An electric current that flows in only one direction. |
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How do photocells work |
Photons (light) is absorbed by the silicon causing electrons to gain energy. These electrons are knocked loose and the free electrons flow around the circuit. |
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As ________ of light increases, ________ produced increases. |
Intensity Voltage |
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What is Passive Solar Heating? |
Glass allows light to pass through it from the outside. Surfaces absorb these short wavelengths and heat up. Heated surfaces emit lower frequency infrared. Glass inside reflects infrared so traps the heat. |
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How is wind caused. |
Convection currents. |
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What is the Dynamo Effect? |
A coil of wire is turned between to magnets to create an AC current |
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What is the name for a coil of wire cutting through magnetic field lines. |
Electromagnetic induction |
Dynamo Effect |
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What is the order that Power Stations work in? |
Boiler, steam, turns the turbine, turbine turns generator, remaining steam gets condensed in cooling towers. |
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Efficiency = |
Electrical energy output Efficiency =----------------------------------- Fuel energy output |
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What are the main gasses in our atmosphere? |
Nitrogen, oxygen, carbon dioxide, water |
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What are the main greenhouse gasses? |
CO2, Water vapour and methane. |
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Describe the greenhouse effect. |
Suns energy comes through atmosphere as short wavelengths. Greenhouse gasses trap the heat radiating off the earth and it can't escape. |
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Why are winds rising? |
Because global warming is causing more convection currents. |
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Why can't you fly after a volcano eruption? |
Because the dust causes infrared heat from the sun to be reflected back up into the atmosphere. |
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Greenhouse effect definition. |
Trapping of infrared radiation in the earths atmosphere. |
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Global warming definition |
A rise in average global temperature. |
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Climate change definition. |
A change in weather pattern, polar ice coverage, sea levels rising and storms. |
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How does a transformer change voltage? |
The voltage induced in the secondary coil depends on the number of turns on the primary and secondary coil. |
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Power = Voltage × Current Energy supplied = Power × Time |
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Nuclear |
Related to the nucleus of an atom |
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What does the proton number indicate? |
The element. |
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Isotope |
An atom with a different nummber of neutrons. |
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What does an unstable nuclei result in? |
Isotopes that are radioactive. |
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Alpha, Beta and Gamma |
Alpha: large clusters of protons and neutrons. Beta: small, fast moving electrons. Gamma: electromagnetic wave. |
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