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Spellzone list 
Key words for GCSE Physics
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gamma |
A gamma ray is a high energy electromagnetic wave emitted by the nucleus to get rid of excess energy.
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ray |
A gamma ray is a high energy electromagnetic wave emitted by the nucleus to get rid of excess energy.
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penetrate |
To penetrate something means to go through it.
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radioactive |
Radioactive decay is when a nucleus becomes more stable by emitting energy.
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decay |
Radioactive decay is when a nucleus becomes more stable by emitting energy.
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unstable |
If something is unstable it is more likely to collapse.
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ion |
An ion is formed when an atom or a group of atoms gains or loses and electron.
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frequency |
Frequency refers to how many waves pass a set point per second.
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ionising
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If a substance is ionising, it means it causes ionisation.
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ionisation
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The formation of ions is called ionisation.
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Geiger-Muller |
A Geiger-Muller tube is used to detect ionising radiation.
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tube |
A Geiger-Muller tube is used to detect ionising radiation.
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half-life |
The time taken for the count-rate to fall to half its original level is called the half-life.
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contamination |
Contamination is when unwanted radioactive atoms are present.
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