Exposure to which radiation is used to preserve fruit?
Alpha radiation
Beta radiation
Gamma radiation
What is the problem when treating cancer by injecting with radioactive substances?
The doctor may pass on their germs.
The radioactive substances can add to background radiation.
The radiation can damage nearby healthy tissue.
Radioactive powder being spilled onto clothing is an example of …. ?
Contamination
Irradiation
Penetration
Where does most background radiation come from?
Radon in the atmosphere
X-rays in hospital
Nuclear weapons testing
Why might a radioactive source be injected into a patient?
To find blockages in arteries
To kill microbes
To find out how old they are
Which type of radiation is used in a household smoke alarm?
Alpha
Beta
Gamma
Whilst using a gamma knife, how do the medical staff protect themselves from the radiation?
Using lead shielding
By wearing aluminium foil hats
By wearing gloves
Why must PET scan tracers be made in the same hospital?
The PET may run off before the tracer is administered.
Positron emitting substances usually have short half-lives.
They are too dangerous to transport by road.
What properties are most desired in an isotope used to investigate the kidneys which normally take 12 hours to process a contaminant?
Alpha emitter, half-life of 10 days
Gamma emitter, half-life of 6 hours
Gamma emitter, half-life of 10 days
Which of these is something that can be done to reduce the risk of exposure to radiation?
Hold the sources carefully
Keep the sources as close as possible
Limit the time spent being exposed