【英語】Unit21 lesson2 brain power 課件PPT（北師大版選修7）,Unit 21 Human Biology,Lesson 2 Brain Power,Match the key words with the definitions.,Key words,atom, billion,cell,nerve cell,organ,1.one thousand million 2.a part of the body that has a particular purpose, e.g.the heart,the liver 3.the smallest piece of sth that can exist alone 4.a tiny part of the body that helps carry messages to and from the brain 5.a unit of living matter,billion,organ,cell,Nerve cell,atom,Listening strategies: completing a text,1.Before you listen,read the text and predict what kind of information you need. remember you may need more than one word 2.Underline some important words in the text before each gap. 3.While you are listening,listen for these important words -the information you need should follow them 4.You can complete the gaps using abbreviations at first this saves time. Then write them in full.,Listen to a science lesson.use the strategies to complete the gaps in this summary,Exercise 2,The brain consists of grey and (1) matter. It weighs(2) .It uses (3) of the bodys energy. It contains over (4) which make up nerve cells. These nerve cells are connected by electrical impulses. There are more possible connections in one brain than there are (5) . Scientists have mapped different areas of the brain which are responsible for (6) . The area of the brain related to controlling(7) could be compared to miniature film studios. Our eyes and ears send signals(8) , and it is our brain that interprets these signals and builds up a picture of the outside world. Scientists have also identified areas responsible for different emotions,such as(9) , love and laughter. There are also different areas for different types of thinking, such as learning your own language and learning a (10) language.,The 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,Listen to the lesson again and answer these questions:,1.how do you think the teacher feels about his subject?,2.what example does he use to explain the way the brain controls different parts of the body?,3.what does he compare to a film studio?,Enthusiastic,A computer,The areas of the brain related to controlling sight and hearing,Listen to a student phone-in programme about revising for exams and complete the table:,exercise 4,The answers:,Exercise 5:listen again and complete the function file with these words:,Must, mustnt , ought to, should, shouldnt,advise, need to, if I were you, have got to,could, theres no point in, its important to, what tips, can be counter-productive, what,Giving and asking for advice,(1) have you got for me and our listeners? I think(2) plan your revision. I think you(3) make a list of all the things youve got to study.You(4) work out what your priorities are. (5) do you think I should do? (6) ,Id make sure that I got some exercise. You(7) get out of the house and get some fresh air. I think spending hours and hours in the library without a break(8) . You(9) drink lots and lots of coffee. (10) you give me some advice? You (11) give yourself rewards. And you(12) give yourself a break. You(13) just think about the exam all the time. (14) doing that. Id(15) people to watch a good film.,The answers:,1.what tips 2.its important to 3.should 4.need to 5.what 6.if I were you,7.ought to 8.can be counter-productive 9.shouldnt 10.could 11.must 12.have got to 13.mustnt 14.theres no point in 15.advise,Vocabulary phrasal verbs,Exercise 7 match the words and expressions below with the verbs n the text(1-11),appear, discover, look at in detail, make a note of , mention, pass, postpone, start, understand,Last month, I had an important English exam. I decided not to (1)put off studying(as I normally do!)and got up early every morning to(2)get down to work straight away. Im a “morning person” and (3)got a lot out of my revision. I always began by(4) going over a practice test I had done-checking my answers and (5)finding out what Id got wrong. I also tried to (6)work out why Id made mistakes.,If I didnt understand sth.,Id(7)write it down and then(8)bring it up in class with my teacher. She was very helpful and she (9)went through all of the things that would probably(10)come up in the exam. In the end,the exam wasnt so bad after all and I think I (11) got through it.Mind you,I still havent had my results yet!,The answers:,1.put off-postpone 2.get down to -start 3.getout of 4.go over-look at in detail 5.find out-discover 6.work out-understand 7.writedown-make a note of 8.bringup-mention 9.go through-look at in detail e up-appear 11.got through-pass,Exercise 8 work in pairs. Discuss these questions:,1.What new information have you found out about brains? 2.Which school subject do you get the most out of ? 3.Do you try to work out your English mistakes yourself before you ask your teacher? 4.Do you write down vocabulary lists or just try to remember everything? 5.Do you put off studying for an exam or a test until the night before? 6.Have you ever got through an exam or a test you thought youd failed?,Exercise 1 on page 83,Homework:,同學們,來學校和回家的路上要注意安全,同學們,來學校和回家的路上要注意安全,