sterilisation
What sterilisation means in Combined Science GCSE, as defined for AQA.
Definitions of sterilisation
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Reference: AQA
A permanent, surgical method of contraception that prevents sperm and egg meeting, intended to be irreversible and giving no protection against sexually transmitted infections.
A later step, for example chlorination, ozonation or ultraviolet light, that kills microorganisms remaining after the filtered water has passed through the beds.
This step kills microbes, for example by chlorination, by exposure to ultraviolet light or by ozonation.
Treatment using chlorine, ozone or ultraviolet light to kill microbes in fresh water.
Topics that use sterilisation
- Contraception (AQA GCSE)
- Potable water (AQA GCSE)
Related terms
Using sterilisation in the exam
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