Combined Science GCSE
Activity
What Activity means in Combined Science GCSE, as defined for AQA.
Definitions of Activity
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
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 decays per unit time.
The number of decays per second in the source, measured in becquerels (Bq).
Topics that use Activity
- Radioactive decay and nuclear radiation (AQA GCSE)
Related terms
- Alpha radiation
- Becquerel
- Beta radiation
- Count rate
- Gamma radiation
- Ionising radiation safety
- Random nature of radioactive decay
- Source selection
Using Activity in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Combined Science questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Combined Science GCSE termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge