7. Radioactive substances be moved around the environment by rain water. true or false?
True
False
8. What is the difference between irradiation and contamination?
if someone comes into contact with something radioactive they are contaminated whereas if a source of radiation is inside a person, they are irradiated
contamination is when you touch something that is irradiated
a source of radiation inside someone can irradiate them whereas if a source of radiation is inside a person, they are contaminated
they are the same thing
9. What source of radiation are we most exposed to?
cosmic rays
radon gas from the ground
x-rays
gamma rays from the ground
nuclear discharge
10. What is meant by saying a subsatnce is radioactive?
