What are radioactive tracers used for?
They are used to locate aircraft in the sky
They are used to find out what is happening inside an object without the need to break into the object
They are used to sterilise medical instruments
The half-life of the radioactive source used in a smoke detector should be?
Equal to the number of days the battery lasts for.
Short
Long
Injected radioactive sources can be used as tracers to make soft tissues, such as blood vessels or the kidneys, show up through medical imaging processes. The radioactive source used should emit...?
Alpha particles
Beta particles
Gamma rays
Radioactive powder being spilled onto clothing is an example of...?
Contamination
Irradiation
Penetration
Which type of radiation is used in smoke alarms?
Alpha radiation
Beta radiation
Gamma radiation
Why might a radioactive source be injected into a patient?
To kill microbes
To find out how old they are
To find blockages in arteries
When a patient undergoes radiotherapy, how do medical staff protect themselves from the radiation?
By wearing aluminium foil hats
Using lead shielding
By wearing rubber gloves
What effect can high doses of radiation have on the human eye?
Cause cataracts
Cause long sight
Cause it to water
What should be the half-life of an isotope used to investigate the kidneys which normally take 12 hours to process?
2 hours
2 days
2 weeks