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1、Unit 21 Human BiologyLesson 2 Brain PowerMatch the key words with the definitions.Key wordsatom, billion,cell,nerve cell,organ1.one thousand million2.a part of the body that has a particular purpose, e.g.the heart,the liver3.the smallest piece of sth that can exist alone4.a tiny part of the body tha
2、t helps carry messages to and from the brain5.a unit of living matterbillionorgancellNerve cellatomListening strategies: completing a text1.Before you listen,read the text and predict what kind of information you need. remember you may need more than one word2.Underline some important words in the t
3、ext 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 su
4、mmary Exercise 2The 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 mapp
5、ed 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 h
6、ave 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 th
7、e universe(6)different functions(7)sight and hearing(8)all the time(9)fear(10)foreignListen 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 h
8、e compare to a film studio?Enthusiastic A computerThe areas of the brain related to controlling sight and hearingListen to a student phone-in programme about revising for exams and complete the table:Exercise 5:listen again and complete the function file with these words:Must, mustnt , ought to, sho
9、uld, 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, whatGiving 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
10、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
11、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 tips2.its important to3.should4.need to5.what 6.if I were you7.ought to8.can be counter-productive9.shouldnt10
12、.could11.must12.have got to13.mustnt14.theres no point in15.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, understandLast month, I had an important
13、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 I
14、d 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 aft
15、er all and I think I (11) got through it.Mind you,I still havent had my results yet!The answers:1.put off-postpone2.get down to -start3.getout of4.go over-look at in detail5.find out-discover6.work out-understand7.writedown-make a note of8.bringup-mention9.go through-look at in e up-appear11.got thr
16、ough-passExercise 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:同学们来学校和回家的路上要注意安全同学们来学校和回家的路上要注意安全
