【精品】 Unit2 Lesson8（教案＋PPT及素材＋习题及解析）-北京课改版-六年级英语下册

Lesson 8 Unit2 Can you tell me more about her? 北京版-六年级英语下册 T: What colour is our Chinese people's skin? S: Yellow． T: Are there any other skin colours in the world? S: Yes, there are. Look, they have different skin colours. Why are people of different colours? All skin colours come from melanin. Task 1 Tick(√) or cross(x). ( ) I. Darker-skinned people have more melanin than lighter-skinned people. ( ) 2. Dark skin can help protect against the sun and skin cancer ( ) 3. lf you were born in a hot and sunny place, you would have darker skin. ( ) 4. Our body can produce melanin without sunlight. √ √ √ x How does the sunlight influence the skin colour? People with more melanin are darker and those with less are lighter. What can you do if you cut your finger accidentally? Use a bandage. What will you find after you remove the bandage several days later? Its colour is light. Why do you choose C? The bandage blocks the sun from the skin. people with more melanin people with less melanin people in hot areas people come from less sunny places 有更多黑色素的人 有更少黑色素的人 在炎热地方的人 来自阳光少的 地方的人 Northern Europe Africa What colour are the most people in Northern Europe? White. What about Africa? Black. Task 4 Answer the following questions. 1. Why do the Chinese people have darker skin than most people in Northern Europe? Because they developed more melanin. 2. Why do the Chinese people have lighter skin than many people in Africa? Because People in Africa get more sun and developed more melanin. Why are people of different colours? How many kinds of skin colours in the world? What colour are the Chinese people? Why do the Chinese people have darker skin than most people in Northern Europe and lighter skin than many people in Africa? Summary 17 介绍肤色形成原因，准备好下节课在全班交流展示。 Homework 在人种分类上，主要根据肤色特征，把人类分为黄色人种、白色人种、黑色人种和棕色人种。白色人种是世界上人口最多的人种，约占世界总人口的54％。他们的体质特征是：肤色多呈浅淡色；发呈金黄，有的呈黑褐色；眼色碧蓝或灰褐色；发形