Food and health(食物与健康)

1、Food and Health,Unit Two,1. Warm-up Activity,Read the following quote about healthy eating. Try to explain it with examples or your personal experiences. The only way to keep your health is to eat what you vdont want, drink what you dont like, and do what youd rather not.,2. Listening and Speaking T

2、ext 1. Genetically modified food,Q and A 1. What do you know about GM food? 2. What do you think of the purpose of producing GM food? 3. Do you mind eating GM foood? Do you think it might do bad to your health?,genetically modified food 转基因食品 read up on the subject 研究这个课题 Dont be daft. 别傻了！ have my

3、food altered 食物被改变 hepatitis B vaccines 乙肝疫苗 play around with. 摆弄 play havoc with 扰乱 When a species dies out or mutates, it has a knock-on effect on the whole ecosystem.党某一物种灭绝或者发生基因突变，它会对整个生态系统产生连锁反应。 cynical 愤世嫉俗的 the habitat of polar bears 北极熊的栖息地 comearound to my way of thinking 改变思维方式 a guinea

4、pig 试验品（小白鼠）,Reference answers,EX 1. TFFFTF EX 2. safer tighter controls vegetables extict decreasing in numbers poor countries whole ecosystem,Class debate: Is GM Food Beneficial,Arguments for: There have been a great number of studies tracking the effects of GM food on animals. These studies indic

5、ate that GM food is safe to consume Farmers who grow GM crops use fewer enviornmentally damaging pesticides. GM crops can have larger yields. The increasing yields of GM crops are essential to feeding the worlds growing population. GM food can withstand colder weather, droughts, and floods Arguments

6、 against: GM crops have led to an increase in herbricide-and-pesticide-resistant weeds and insects. There is no scientific consensus on the long-term safety of GM food. Introducing a gene into a plant may cause unexpected allergic reactions to people. Some GM foods have antibiotic features built int

7、o them. People who consume these foods may become resistant to antibiotic drugs.,Text 2. Truth about organic food labels,The different organic food labels: Natural: anything but organic Contains organic ingredients: less than 70% Made with organic ingredients: at least 70% Organic: at least 95% 100%

8、 organic The organic labeling omeat and dairy products: Grass fed: outdoors and a natural diet of grass Free range: outdoors No hormones added,Reference answers for,organic less than at least 95% 100% the outdoors natural diet being kept in small cages being raised,Group work,Describe the chart brie

9、fly and give comments on your own claims (refer to the useful expressions on P. 21),Text 3. Meat or not- Four types of vegetarians,Work in groups on the following questions: Can you live without meat? Do you know any person who doesnt like eating meat? Have you ever asked them about the reasons? Why

10、 do more people choose to become vegetarians now? What can people benefit from a vegetarian diet? What are the health risks in becoming a vegetarian? Do you want to be a vegetarian? Why or why not? Group report for the answers of these questions in a short passage.,a lacto-ovovegetarian: plant food+

11、diary products+eggs diary eggs a lactovegetarian: plant food+diary products an ovovegetarian: plant food+eggs a vegan: plant food only,Reference answers,EX 1. . EX 2. milk, cheese, yoghurt marine source like marine algae, fish oil supplementd eat meat EX. 3 homework,3. Viewing and Speaking,List some

12、 processed foods which you like but may do harm to your health if you eat too much of them. And tell us why you like them? Can we completely avoid processed foods in our daily life? If not, what measures can we take to maintain a comparatively healthy diet? Learn the new words and expressions on P.24.,Reference answers,1. their natural state, man-made ingredients shelf life, hydrogen, up to a half gram, the same as, look old 2. bad, good, plastic, cells, communicate or talk, cancer, packaged foods, fat, desire more, high blood tressure