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13 Cards in this Set
- Front
- Back
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How do photocells work |
Light energy absorbed by silicon atoms knocks electrons free producing DC |
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Advantages and Disadvantages of wind energy |
Renewable non waste Ugly don't produce much electricity |
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Dynamo effect and how to increase current induced |
Moving a piece of wire between magnet poles A stronger magnet More turns on the coil Move the wire faster |
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Greenhouse gases |
Water vapour methane and carbon dioxide |
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Advantages and Disadvantages of biofuel |
Low fuel costs carbon neutral Releases pollutants use land that could be used for food power plants are ugly |
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For and Against nuclear power |
Large amounts of electricity lots of fuel no polluting gases Decommissioning is expensive very slow start up time expensive to process waste risk of accident |
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Alpha Beta Gamma |
Alpha most ionising can't go through paper Beta can't go through aluminium Gamma a wave that is stopped by a few cm of lead |
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Uses of particles |
Alpha smoke alarms Beta checking thickness of paper Gamma medical tracers and gama knifes |
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What are comets |
Ball of ice and dust |
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Evidence of big bang |
Red shift Background radiation left over |
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Star cycle |
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What is the Ptolemaic model |
Earth at the center of the universe Universe is surrounded by fixed stars |
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Further advancements of universe |
Copernicus sun centered model Galileo proved plants orbit the sun Newton discovered gravity |
