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Key words for GCSE Physics

precaution If you take a precaution, it means you do something to stop something dangerous from happening.
irradiation Exposing objects to nuclear radiation is called irradiation.
chain A chain reaction is when neutrons, released during fisson, cause frisson in other nuclei which cause more neutrons to be released.
reaction A chain reaction is when neutrons, released during fisson, cause frisson in other nuclei which cause more neutrons to be released.
nuclear Nuclear fusion is when two nuclei are joined together.
fission Nuclear fission is when an unstable nucleus is split.
Becquerel A Becquerel is a unit of activity.
activity The rate at which a source of unstable nuclei decays is known as its activity.
count-rate The number of decays recorded per second is the count-rate.
background Radiation in the environment is called background radiation.
radiation Radiation in the environment is called background radiation.
spontaneous If something is spontaneous, it means it happens without external stimulus.

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precaution
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precaution
irradiation
chain
reaction
nuclear
fission
Becquerel
activity
count-rate
background
radiation
spontaneous

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