高中英语Unit 21 Lesson 2 Brain Power 3课件北师大版选修

1、Brain Power,Test your memory : Look at the following numbers for about one minute and then write down as many as you can remember .,73 49 64 83 41 27 62 29 38 93 74 97,How is your memory ? more than 9, 7-8 , 4-6 , less than 3,Before you start : Complete the sentences with the following words .,atom

2、, billion , cell , nerve cell , organ , function , sight , hearing ,fear,atom , billion , cell , nerve cell ,organ , function , sight , hearing , fear,1.The eyes are the organs of . 2.How many are there in the universe ? 3.Human tissue (组织) is made up of . 4.The liver is an and so is the heart. 5.Th

3、e population of China reaches up to 1.3 .,sight,atoms,cells,organ,billion,atom , billion , cell , nerve cell ,organ , function , sight , hearing , fear,6.The of the heart is to pump blood through the body . 7.A is a tiny part of the body that helps carry messages to and from the brain . 8.He will fi

4、nish the job without of hardship or death .,function,nerve cell,fear,Listening Strategies : Completing a text 1 Before you listen , read the text and predict what kind of information you need . 2 Underline some important words in the text before each gap(空格) . 3 While you are listening , listen for

5、these important words the information you need should follow them . 4 You can complete the gaps using abbreviations (简写) save time , then write them in full .,Important word(s) and our predictions,For example :,1.consist of a color,2.weighs how heavy ?(number),3.energy how much ?(number),4. contain

6、how many much ? (number),Important word(s) before each gap :,1. consist of 6. are responsible for 2. weighs 7. controlling 3. energy 8. signals 4. contain 9. emotions 5. more than 10. own (language),Listening : Listen to the science lesson . Use the strategies to complete the gaps in Ex 2.,Listening

7、 : 1 Listen for the first time : get a general idea. Dont hurry to write down your answers . 2 Listen again : write down your answers and check with your partners . 3 Listen for the last time : check your answers again and make sure they are right .,Listening : Remember , you may need more than one

8、word in each gap .,Check your answers :,1. white,2. just over a kilo,3. 20,4. 100 billion cells,5. atoms in the universe,6. different functions,7. sight and hearing,8. all the time,9. fear,10. foreign,A challenge : Look at the following words for about two minutes and then write down as many as you can remember . Try to fin