Physics GCSE
activity
What activity means in Physics GCSE, as defined for AQA.
Definition of activity
Check what you remember
Read the wording for your board, then hide it and explain activity in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The rate at which a source of unstable nuclei decays, measured in becquerels (Bq), where 1 Bq equals one decay per second.
Topics that use activity
- Radioactive decay and nuclear radiation (AQA GCSE)
Related terms
- background radiation
- choosing a half-life
- gamma ray
- independence from conditions
- ionising power
- neutron emission
- penetration
- randomness
Using activity in the exam
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