There are two flasks,  labelled A and B  A  tastes like water and will not immediately harm you if you drink it. However, ...
Things to think about  You probably think that B was the most dangerous as it would definitely kill you. However, the sour...
Lesson 8 Mobile Phones and Health
You will be successful if you can:   <ul><li>Explain  possible effects of mobile phones and masts in terms of absorption o...
Activity <ul><li>Think about the  bellwork and mobile </li></ul><ul><li>phones and masts:  </li></ul><ul><li>How are they ...
How Safe? - Activity
How Safe? - Activity <ul><li>The key thing to get from Activity 1 is that, despite the fact that some areas appear to have...
 
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L8

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L8

  1. 1. There are two flasks, labelled A and B A tastes like water and will not immediately harm you if you drink it. However, if you drink more than a litre of it, you have a 1 in 4 chance, in five years’ time, of developing a terrible liver disease that will kill you. B tastes ghastly. If you drink one mouthful it will kill you painlessly in 5 minutes.   Which is more dangerous? Why?
  2. 2. Things to think about You probably think that B was the most dangerous as it would definitely kill you. However, the source would be rapidly identified and nobody else would die. Flask A could go on killing people for many years as it would be very difficult to find the cause 5 years later. This is the problem with medical research. Many people claim that mobile phones can cause illness. Proving this link (one way or the other) is extremely difficult.
  3. 3. Lesson 8 Mobile Phones and Health
  4. 4. You will be successful if you can: <ul><li>Explain possible effects of mobile phones and masts in terms of absorption of microwave radiation </li></ul><ul><li>Explore issues of cause and correlation in decision making . </li></ul><ul><li>Explain how to judge a study based on a sample population. </li></ul><ul><li>Critically evaluate the reporting of a health issue. </li></ul>
  5. 5. Activity <ul><li>Think about the bellwork and mobile </li></ul><ul><li>phones and masts: </li></ul><ul><li>How are they similar, how are they different? </li></ul><ul><li>Why are people willing to take risks with their health to use mobile phones? </li></ul><ul><li>Why are they less willing to put up with mobile phone masts? </li></ul>
  6. 6. How Safe? - Activity
  7. 7. How Safe? - Activity <ul><li>The key thing to get from Activity 1 is that, despite the fact that some areas appear to have more deaths, they all have the same risk (1 in 6). </li></ul><ul><li>In Activity 2, you probably found that at least one of the 1 in 6 risk areas had as many (if not more) deaths than the 2 in 6 risk areas. This shows that you did not have sufficient data to show a clear trend. </li></ul>

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