Radioactivity- Use Of Radiation

Question 1

Radiation is harmful because it is ________ (the ability to knock electrons out of atoms).

Answer 1

Radiation is harmful because it is ionising (the ability to knock electrons out of atoms).

Question 2

In humans radiation can cause __________ to DNA leading to cancer or can kill the cell.

Answer 2

In humans radiation can cause mutations to DNA leading to cancer or can kill the cell.

Question 3

Smoke detectors use _____ radiation.

Answer 3

Smoke detectors use alpha radiation.

Question 4

Thickness monitors use ____ radiation

Answer 4

Thickness monitors use beta radiation

Question 5

Medical uses of radiation can be used to explore ________ ______ and control or destroy ________ _______.

Answer 5

Medical uses of radiation can be used to explore internal organs and control or destroy unwanted tissues.

Question 6

Gamma radiation can be used to ____ ______ _____.

Answer 6

Gamma radiation can be used to kill cancer cells.

Question 7

Beta or _____ can be used as a ______. The half-life must be long enough to detect but not too long.

Answer 7

Beta or gamma can be used as a tracer. The half-life must be long enough to detect but not too long.

Question 8

_______ sources of __________ radiation include cosmic rays (12.5%), food and drink (12.5%), rocks and buildings (12.5%), and radon gas (50%).

Answer 8

Natural sources of background radiation include cosmic rays (12.5%), food and drink (12.5%), rocks and buildings (12.5%), and radon gas (50%).

Question 9

114.Man-made sources (12.5%) of radiation come from nuclear fallout from weapon
tests, nuclear disasters, and medical uses.