Radiation Safety and Uses
IGCSE Edexcel Physics
7.9-7.16 Uses and Safety
Key Concepts:
Detectors measure radiation. Ionizing radiation can be harmful but has useful applications.
Section A: Detection and Background
1. Name two detectors of ionizing radiation.
[2]
2. State one source of background radiation.
[1]
Section B: Uses and Safety
3. Give one medical use and one industrial use of radioactivity.
[2]
4. State two hazards of ionizing radiation.
[2]
5. Give two ways to reduce exposure to radiation.
[2]
Total marks: 9
Mark Scheme
1.
Geiger-Muller tube, film badge (any two) [2]
2.
Rocks, cosmic rays, radon (any one) [1]
3.
Tracers/radiotherapy; thickness control/sterilization [2]
4.
Mutations, cancer, tissue damage [2]
5.
Shielding, distance, reduce time [2]