QUIZ 2 on RADIOACTIVITY - dangers and monitoring of ionising radiation levels

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(a) When radiation from radioactive materials collides with neutral atoms or molecules these may become charged or .
(b) When radiation ionises molecules in living cells it can cause damage, including damage and ultimately . The lower the dose of radiation the the risk of cancer.
(c) Higher of radiation can kill , so radiation is used to kill cancer cells and harmful in packaged .
(d) As radiation passes through a material it can be . The greater the thickness of a material the the absorption. The absorption of radiation can be used to monitor and the thickness of materials on a fast moving production line of paper, or sheet steel.
(e) When sources of radiation are outside the body beta and radiation are the dangerous because they can reach the cells of and may be absorbed by them. However, radiation is the dangerous because it is unlikely to reach living cells.
(f) Workers who are at risk from radiation often wear a radiation to monitor the amount of radiation they have been to over a period of time. This is a small packet containing film and the more radiation a worker has been in contact with, the the photographic film is when it has been developed.
(g) When sources of radiation are the body, alpha radiation is the most dangerous because it is so absorbed by cells. Beta and gamma radiation are less because cells are not as likely to absorb these radiations.

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