Unit 2 Healthy eating(warming up)

课件31张PPT。 Unit 2
Healthy eatingWarming Up
Everybody has to eat, but do you eat a healthy diet? Do you know that the food you eat helps you grow in different ways?
A healthy diet is defined as one that is balanced and not too rich in fat, sugar and salt or too poor and lacking in essential nutrients. Functions of food Nutrients in food Kinds of foodThe Food We EatKinds of food meat
vegetable
seafood
fruit
snakeFood group: meat猪肉
牛肉
羊肉
鸡肉
鸭肉
腊肉 pork
beef
mutton
chicken
duck
bacon
meatFood group:
vegetables carrot cabbage bean tomato cornvegetables mushroomFood group:
fruitsfruitstrawberry watermelon grape cherry durian peachFood group:
Sea foodSea food----lobsterSea food----crabSeafood 魚
螃蟹
蝦
貝類
田螺
生蠔
章魚
龍蝦
fish
crab
shrimp
shell
winkles
raw oysters
octopus
lobster
Food group:
snakeFunctions of foodFunctions of foodMaintain lifeKeep healthyPrevent diseasesSupply energySatisfy hungerWhy do we have to eat everyday?Nutrients of foodNutrients of foodFive types of nutrients are:proteins (蛋白質)carbohydrates (碳水化合物)vitamins (維生素)minerals (礦物質)fats (脂肪)3 Main Functions:energy-giving foods
Body-building foods (to grow bones and muscle)
Protective foods (give fibre for digestion and health)Give examples for each one.Foods to give you energyFast energy foodsricesugarnoodlespotatoesspaghettibreadSlow energy foodsFoods to give you energybuttercreamoilsnutsFoods to grow bones and musclemeateggscheesemilkTofu;
bean curdFoods that give fibre for digestion and health protective foodsvegetablesfruitDiscussion: How to keep healthy?Junk food
—has a lot of calories but few nutrients, vitamins and minerals.Healthy food
—give us the calories we need but not contain too much fat and sugar.1. Do you think we should eat each
kind of food?Sure.
We can eat a balanced food in this way.Too much fatty food or body-building food may store energy in the bodies and may cause problems for digestion and lead to illnesses unless fibre foods are eaten to aid digestion.2. What will happen if we don’t eat a
balanced diet?chocolatecakescreamchocolatenutscabbagehameggsWhich of the following foods contain the most fat? Put them in order from 1(most fat) to 5 (least fat):ice-creameggschickenricepeachesDiscussionWhich country food is healthier,the Chinese food or Western food?Chinese food: the healthiest diet ,a lot of fruit and green vegetables, rich in fibre, low in sugar
Western food: too much fat (meat, potato crisps/ chips, butter, cream and chocolate…),too much sugar (cakes, soft drinks, sweets…)diet
既可做可数名词，也可做不可数名词
（个人、社区）通常吃的食物、节食
Eg: 1) Too much diet is not good for you.
2) Proper diet and exercise are both
important for healthy.
3) I mustn’t have chocolate----- I am on a diet.diet与food
diet: 指的是习惯的食物或规定的食物，特指维持
健康的定质或定量的食物。
food:一般食物，指任何能吃能喝的具有营养的东西。
Eg: 1) We must have food to eat and clothes to wear.
2) The doctor has ordered me a special diet.balance
1) v. 权衡、平衡、对比
eg: 1) We must balance the two plans.
2) Can you balance yourself on skates?
2) n. 天平、称
eg: weigh sth. in the balance 用天平称……
be out of balance 不平衡
keep one’s balance 保持平衡
lose one’s balance 失去平衡
a favorable balance 入多于出
an unfavorable balance 入不敷出