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28 Cards in this Set
- Front
- Back
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Hydroelectricity
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Electricity from water.
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Oscillation
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Vibration or repetitive pattern of movement, for example, up and down or side to side.
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Medium
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The material through which a wave travels.
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Image
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A picture of an object formed by light rays.
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Optical fibres
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A thin glass or plastic strand that can transmit light or infared radiation over long distances. `1`
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Pitch
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How high or low a note sounds.
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Watts
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Unit of electricity.
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Biofuels
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Fuels made using biomass.
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Decommissioned
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Something that is dismantled safely.
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National Grid
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Grid of cables that transport electricity around the UK.
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Transformer
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Someting that changes the voltage of electricity.
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Electricity tariff
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Amount customers pay for electricity.
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Vacuum
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A place where there is no matter at all-empty space.
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Frequency
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Number of cycles passing a point in one second.
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Amplitude
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Maximum displacement that a point moves away from its position.
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Reflected
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Something is reflected when it bounces off a surface.
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Normal
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Perpendicular line crossing a point.
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Diffraction
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The spreading out of waves when they pass through a gap.
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Electromagnetic spectrum
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Complete ranfe of electromagnetic waves.
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Ionosphere
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High and electrically charged layer of the atmosphere.
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Echo
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Reflection of sound waves.``
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Blue shift
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The decrese in wavelength when it is approsching something.
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Red shift
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The increase in wave length when it is moving away from something.
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Hypothesis
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A suggested explanation.
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Conductor
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Something which conducts electricity.
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Insulator
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Something which stops electricity passing through.
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Convection
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Liquids transfering energy.
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Kinetic energy
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Energy produced by something moving.
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