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ENGAGE ban cola


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ENGAGE - European Project on Responsible Research and Innovation in Science Education

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ENGAGE ban cola

  1. 1. For more, visit Ban Cola? Equipping the Next Generation for Active Engagement in Science fizzy drink
  2. 2. 2 Objectives To use what you know about food and health in a new context. To decide whether there is enough evidence to show that a factor causes a disease.
  3. 3. 3STARTER Should we ban sugary drink sales to under–18s?
  4. 4. 4 39 g (10 packets) How much sugar is in a cola bottle? 4STARTER
  5. 5. 5 So do sugary drinks cause obesity? Jed drinks lots of sugary drinks. He becomes obese. 5CORE TASK Big question
  6. 6. 6 Sort the evidence that sugar causes obesity: Is there enough evidence to ban sugary drink sales to under–18s? weak evidence SS1 strong evidence CORE TASK
  7. 7. 7 Will they ever agree? Scientists will be more confident that sugary drinks cause obesity if they can explain how. What’s the conclusion? It’s uncertain. Not all scientists agree. 7PLENARY 1
  8. 8. 8 David Cameron, Prime Minister SS2 EXTENSION Weigh up the pros and cons. Do you support a ban? We are considering a ban on fizzy drink sales to under-18s. What do you think?
  9. 9. 99PLENARY Were all your reasons scientific? What else did you think about when making your decision?
  10. 10. Get students talking and thinking
  11. 11. For more, visit Student sheets Ban cola Sheet no. Title Notes SS1 Evidence cards Reusable, cut into cards, one per group SS2 Argument cards Reusable, cut into cards, one per group
  12. 12. SS1 Evidence cards Dr Hoebel found that when rats drink sugary water, their brains release a hormone, dopamine. This gives a feeling of pleasure, leading to addiction. He says that this shows that sugar is addictive to rats. Strong or weak evidence?A Alan Barclay of the Australian Diabetes Council said that sugar consumption in Australia has decreased by 20% since 1980. In the same time the number of overweight people has doubled, and the number of people with diabetes has tripled. Magalie Lenoir of Bordeaux University gave rats the choice of sweetened water or cocaine. 94 % chose sweetened water. She thinks this is because sweet foods trigger reward signals in the brain. Peter Benton of Swansea University read more than 100 scientific papers to find out if sugar addiction is a cause of obesity. He concluded that animal addictions do not predict human addictions. Robin Lustig of California University found that sugar is like alcohol and tobacco. It acts on the brain to make you want it again. The World Health Organisation says that too much food and drink overall increase body weight, not just too much sugar. University scientist Francesco Sartor asked 11 slim people to drink more sugary drinks than normal. After four weeks they were 1 kg heavier on average. Richard Johnson of Florida University drew this graph. The top line shows sugar intake per person. The bottom line shows obesity rates. Strong or weak evidence?B Strong or weak evidence?C Strong or weak evidence?D Strong or weak evidence?E Strong or weak evidence?F Strong or weak evidence?G Strong or weak evidence?H Sugarconsumption (kg/individual) Year Obesityprevalence(%)
  13. 13. SS2 Argument cards “Excess weight is linked to heart disease and diabetes.” 1 “The acid and sugar in sugary drinks cause terrible tooth decay.” Beth Bradshaw, Dentist “Obesity is a complex problem with many causes. A sugary drink sales ban to under-18s will make no difference.” Ahmed Hussain, British Soft Drinks Association “At our school, behaviour used to be better in the mornings. Then we banned sugary drinks at lunchtime. Afternoon behaviour improved.” Sarah Sandford, headteacher “Every year, more people die from diseases like diabetes and heart disease than from infectious diseases.” Grace Mlokozi, United Nations, 2011 “We got 51 students to rinse their mouths with lemonade. Some lemonade was sweetened with sugar, and some with artificial sweetener. The students with sugary lemonade did better in concentration tests.” Matthew Sanders, University of Georgia, USA “Governments control alcohol and tobacco sales because they are hard to avoid and they have a bad impact on society. Sugar has similar problems.” Thomas Babor, University of Harvard, USA “Nearly 7000 students did a questionnaire for us. We found that banning sugary drinks in schools did not reduce the amount they drank overall.” Daniel Taber University of Illinois, USA 2 3 4 5 6 7 8 Heart attacks and body weight Healthy Overweight Obese Percentagewhohavehadheartattack Jessica Wright, West Virginia, USA Diabetes and body weight Healthy Overweight Obese Percentagewithdiabetes Weight category
  14. 14. Get students talking and thinking
  15. 15. Equipping the Next Generation for Active Engagement in Science