Physics GCSE
hazard over time
What hazard over time means in Physics GCSE, as defined for AQA.
Definition of hazard over time
Check what you remember
Read the wording for your board, then hide it and explain hazard over time in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The half-life sets how the hazard is spread over time, so a short half-life source soon becomes safe while a long half-life material stays hazardous for thousands of years.
Topics that use hazard over time
- Different half-lives of radioactive isotopes (AQA GCSE)
Related terms
- activity against duration
- activity and half-life
- medical tracers
- unit conversion
- waste storage
- range of half-lives
- steepness of decay curve
Using hazard over time in the exam
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