Atomic StructureAQA GCSE Physics (8463)

Hazards and Uses of Radioactive Emissions and of Background Radiation

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

Practice progress

6 MCQs

0 of 6 attempted

Correct

Incorrect

Remaining

1
Largest single source of UK background radiation:
Answer & explanation
Correct: option C
Radon ~50 % of UK background.
2
Unit of radiation dose:
Answer & explanation
Correct: option B
Sievert (Sv) measures biological-effect dose.
3
Average UK background dose:
Answer & explanation
Correct: option B
~2.7 mSv/year.
4
Largest MAN-MADE source of UK background radiation:
Answer & explanation
Correct: option B
Medical sources dominate the man-made fraction.
5
Which is NOT a natural source?
Answer & explanation
Correct: option D
CT scans are medical (man-made).
6
Why is radon dangerous?
Answer & explanation
Correct: option B
α inside lung tissue is highly damaging.

Atomic StructureAQA GCSE Physics (8463)

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

6 MCQs

0 of 6 attempted

Correct

Incorrect

Remaining

1
Largest single source of UK background radiation:
Answer & explanation
Correct: option C
Radon ~50 % of UK background.
2
Unit of radiation dose:
Answer & explanation
Correct: option B
Sievert (Sv) measures biological-effect dose.
3
Average UK background dose:
Answer & explanation
Correct: option B
~2.7 mSv/year.
4
Largest MAN-MADE source of UK background radiation:
Answer & explanation
Correct: option B
Medical sources dominate the man-made fraction.
5
Which is NOT a natural source?
Answer & explanation
Correct: option D
CT scans are medical (man-made).
6
Why is radon dangerous?
Answer & explanation
Correct: option B
α inside lung tissue is highly damaging.