高一物理全套教案（精选4篇）
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D．青藏高原
12.下列选项中，描述该地区景观的是（）
A．不识庐山真面目，只缘身在此山中
B．会当岭绝顶，一览众山小
C．山在两岸走，人在画中游
D．一片孤城万仞山
13．形成喀斯特地貌的最主要岩石有（）
A．石灰岩
B．花岗岩
C．白云岩
D．石英砂岩
14．岩石的透水性取决于（）
A．岩石的硬度
B．岩石的结构与区域构造
C．岩石的酸碱度
D．岩石的空隙和裂隙的发育程度
15．地面喀斯特地貌主要包括（）
A．峰林
B．石笋
C．石柱
D．落水洞
16下列自然景观由喀斯特作用形成的是（）
A．壶口瀑布
B．桂林山水
C．路南石林
D．黄山群峰
17．有利于桂林“山水”形成的自然条件是（）
A．桂林地处亚热带湿润区，气候温暖，全年降水丰富
B．桂林地区石灰岩广布，岩性纯
C．桂林地区土壤中有机质含量少
D．桂林地区地形相对较平坦
18．桂林山水是四大圈层相互作用的结果，有关叙述正确的是（）
A．桂林气候条件有利于生物生长，为喀斯特地貌形成创造了条件
B．桂林地区山地多平地少，不利于植物的生长发育
C．桂林地区地表水和地下水都十分丰富，有利于喀斯特地貌的形成
D．桂林地区的石灰岩厚度大、岩性纯，不利于水的下渗
二、综合题
19．读图3-3-2，回答下列各题。
（1）图中的溶洞是由于石灰岩受到含有的流
水的 作用而形成的，其反应的化学方程式为。
（2）图中a是
，b是
，c是
。它们是由于
作用而形成的。其形成过程中的化学方程式为。
（3）图中地貌形态主要在我国
、（省或自治区）分布非常普遍。
（4）写出你所知道的如图景观的著名旅游景点名称两个：、。
20.图3-3-3是我国某地区等高线地形图。读图回答下列各题。
（1）图示地形分布在我国
（地形区），该地形区属于
气候，气候特点是。
（2）图中地貌发育的最基本条件是
，形成该地貌的最主要岩石是
（3）图中地貌形成的主要原因是
、相互作用的结果。
21.读材料，回答下列问题。
材料：徐霞客在考察了广西、贵州、云南后，对这一带发育的峰林地貌作了总结：“峭峰离立，分行竞颖”，“磅礴数千里，为西南奇胜”。他还指出这“磅礴数千里”的岩溶地貌，并不是一成不变，而是各省有各省的特点：广西之山的特点是“有纯石者，有间石者，各自分行独挺，不相混杂”；云南之山，“皆土峰缭绕，间有缨石，亦十不一、二，故环洼为多”；贵州之山，“则界于二者之间，独以逼耸见奇”。又说：云南之山，“惟多土，故多雍流成海，而流多浑浊”；广西“惟石，故多穿穴之流，而水悉澄清”；至贵州则“界于二者之间”。
——选自《徐霞客游记导读》
(1)徐霞客为代人，著名的
(2)比《徐霞客游记》更早记载溶洞的著作包括成书于战国年间的《道元的《
》等。
(3)西南地区岩溶地貌发育的主要自然条件是什么？
(4)文中“雍流成海”的“海”是指“流多浑浊”的原因是文中“穿穴之流”是指。
22．读图3-3-5回答下列各题。
（1）黄果树瀑布位于A的位置，此地区的地形特点是，气候特点是。
（2）从成因看，黄果树瀑布主要由
（内力或外力）作用形成，具体表现为受 作用的结果。我国还有哪些著名的瀑布景观，请举2个例子。
（3）“桂林山水”位于图中
处（填字母），属于
（省区）。它是
地貌的典型景观。唐韩愈有“江作青罗带，山如碧玉簪”的诗句概括其特色。应如何欣赏“桂林山水”才能达到最佳效果？
（4）你能用所学过的化学知识解释“桂林山水”的石灰岩的“岩溶”原因吗？（写出化学反应方程式）。
第四单元 第一节 自然资源与人类
第一部分 教案
教学目标
1.引导学生认识自然资源的特征
2.以土地资源为例，说明在不同生产力条件下，自然资源的数量、质量对人类生存和发展的意义，使学生学会用历史发展的观点看待自然资源对人类活动的影响
3.通过认识自然资源数量的奶限性和利用的发展性，使学生学会辩证的看待问题，懂得利用自然资源应遵循可持续发展原则
教学重点 ①自然资源的概念、分类和特征 ②土地资源与人类活动的关系
教学难点 ①自然资源的特征 ②土地资源与人类活动的关系
教材分析
一、认识自然资源
Step 1 warming up
Activity 1 talking about some signs used everyday
T: Most of you have been to many places whether big or small , far or near , and I’m sure you must have seen many signs . Now I’d like you to see some signs used everyday , and tell me what they represent , ok ?
Ss: Ok .
(show the signs on the screen)
T: What does Sign1 mean ?
Ss: Be quiet
T:Where do you usually see it ?
Ss: bus / railway station
T: what about sign 2 (sign2/3/4…the same as above)
Activity 2 : talking about the pictures on Page 15
T: turn to page 15 and have a look at the pictures ,I’ll give you two minutes to discuss with your partner and see whether they are doing wrong and write your answers on the line .there is already an example in picture 1, the man is driving too fast , he should drive at the speed of 30 km an hour , but he is driving at 60 km per hour .
(2 minutes later)
T: S5, is she doing anything wrong in picture 2?
S5: Yes
T: What’s that ?
S5: She is littering
T: Why?
S5: Because there is a sign in the tree saying Don’t litter/No littering.
(picture 3 and 4 the same as above)
T : Very good , Whenever you go on a trip , we shouldn’t do what we aren’t allowed to do , is that clear ?
Ss : Yes
step 2 an open discussion
T: How do you usually go to school? Or what kind of means of transportation do you take to go to school ?
( Bb : means of transportation : a means of carrying people or goods from one place to another)
Ss: By bus / by bike
T: Why ?
Ss: Because it’s not far.
( Bb : by bus –not far - distance)
T: Does anybody of you live in Dongtou Island?
Ss: No
T: Then suppose you live in Dongtou Island , and now it’s the weekend , how are you going home ?
Ss: By ship
T : why ?
Ss : because there is a lot of water around it .
( Bb : by ship-water - location)
T: suddenly the typhoon comes , how are you going home ?
Ss: By bus
T: So the weather is very important . Ok , what you said is reasonable
T: so from the above we can have a conclusion : before we decide which means of transportation we have to consider many things , now comes the question : what have we to consider ? ( an open question)
Ss: weather , time , distance, location …
( Bb : consider : think about , follow by sth ./doing sth /wh-to do sth /clause)
( show the map of PRC)
T : look at the third part of warming up , there are 4 situations and now discuss how you’d like to go to the places , by train , by boat , by air or others , and give reasons , the map can help you , please work in group of 4.
T: how would you go from shanghai to London( pointing to the map)what about from Beijing to Guangzhou / chongqing to chengdu / dalian to qingdao
Ss: By plane / train or bus / ship
Step 3 Speaking
Activity1 pre-speaking :ask and answer
T : do you know which actor I like best in Hongkong ?
Ss: …
T: I like him best , he plays an important part in this series (show the picture of Looking back into the Tang Dynasty on the screen)
T: What does this series talk about ?
S8:
( show on the screen “ a modern man traveled into the past ”)
T: what will you travel by if you want to go to the past or the future ? I have a machine which can take you to wherever you like and whichever year. (show the picture of the machine) I’m quite generous , if you want to borrow it from me , I’m glad to lend it to you.now I’ll give you 2 minutes to the place you’d like to visit best , the years when you would go and the reasons
( 2 minutes later)
T :Ok, who’d like to borrow it from me ?
( several students respond)
T: Ok, S9,which year would you like to go to ?
S9 :
T: where would you go ?
S9:
T: why ?
S9:Because…
T: Good , now take my machine , I wish you a good journey
T: OK ,S10, what about you ? Now S9 has come back , she said my machine was wonderful , which year would you like to go to ? ( S10/11 the same as above)
(the answers to each student are written on the blackboard)
Activity 2 making dialogues
T: Just now , I have made three examples for you . now please look at the examples in your books . it’s a dialogue between 2 students . They are talking about traveling to the future , read the dialogue by yourself first and two of you are to make a new dialogue using the information on the screen
(show the questions on the screen :Which year would you like to go to? Where would you go ? Why ? )
and make as many sentences as possible . I’ll give you 4 minutes to prepare and then I’ll ask 2 pairs of you to act out your dialogue , any questions ?
Ss: No.
( 4 minutes later )
T: who’d like to have a try ? S11 and your partner ,please ( 2 pairs)
Step4 debate
T : each of you wants to go somewhere else to have a trip , but not all the local people like you to go there , some thinks tourism is good for them ,others think it bad , now suppose you live in a village , some of you want to develop the lake and turn it into a tourist resort (胜地) while some not .
( show the two parties on the screen :)
A :You think tourism will be good for your village because
1.
2.
3.
B :You think tourism will be bad for your village because
1.
2.
3.
T: now group 1and 2 are A , and groups 3 and 4 are B , you can think out as many reasons as possible , then we’ll have a debate to which party will win I’ll give you 3 minutes to prepare
Step 5 summary and homework
Activity 1 : summary
Today we’ve done some speaking and know how to choose means of transportation , also we’ve used my machine and traveled to many places to the future and the past , besides we’ve learned some new words
Activity 2 : homework
Preview the reading text on page 17 and underline the new words and expressions
Do the exercises on page 101
Period 2 : Reading
Step 1 greetings
Greet the whole class as usual
Step 2 pre- reading
Activity 1 : pre-reading : questions
T : In the last period we’ve learned something about traveling , do you like traveling
Ss : Yes
T :why ?
Ss: because
T: where would you most like to go ? S1
S1: …
T: Why ?
S1 : because
( 2 students )
T : Do you want to experience something different ?
T : now turn to page 17 , look at the picture , what are they doing ?
Ss : they are walking
T : yes , and what are they carrying ?
Ss : Large bags
T : yes , or we can say it’s backpack . in front of them ,there is a high mountain , they are to climb them .
T: One of my friends went to Qingzang Plateau in the summer holiday .And he told me that he was making an adventure travel , do you think so ?
Ss : Yes
T : Then in your opinion , what’s an adventure travel ?
( S2 answers the question , 2 or 3 others add the answers)
T: Yes ,quite right . what are the two popular activities ?
Ss : hiking and rafting ( since some of them may have previewed the lesson , so they may know the answer )
Activity 2 : main idea
T : is it right ? now listen to the tape to find out whether hiking and rafting are the two popular activities , and to find out the main idea of the text , are you clear ?
( show the questions on the screen to make sure they won’t forget the questions)
( play the tape)
T : now all together , it’s right or not ?
Ss: Right
T : who ‘d like to tell us the main idea of the text . Ok , S3
S3 :
( generalize his answer and show the answer on the screen)
T : Very good . ok , we watch TV a lot , and from the TV , what other kinds of adventure travels do you see ?
Ss : ( climbing , diving , mountain biking , sailing , downhill snowboarding ,camping ,bungeeing)
Step 3 While reading
Activity 1 extensive reading
T: ok , now let’s turn to the text , This time , let’s read the text quickly and do the true or false questions on the screen .
T : first read through the questions
( 1minute later)
T : You can start reading now I’ll give you 3 minutes to do the job . if it’s false , correct it , ok?
( 3 minutes later )
T : ok , now , No. 1 …
( check the answers )
1.Hiking and rafting are both very dangerous.
2.When you are hiking , you should wear a life jacket .
3.People make adventure travels because they are looking for unusual experiences
4. The name “ whitewater” comes from the fact that the water is white Activity 2 intensive reading
T: turn back to page 17 . read the first paragraph carefully and find out the main idea of the paragraph , or what’s it about ? and find out the reasons of traveling , understand ?
( 1’ later)
T : ok , all together , what’s the main idea of the text
Ss: Why do many people travel ? ( shown on the screen )
T : yes , good . well , what are the reasons ?
Ss :see other countries , visit places …( shown on the screen)
T : yes , people travel for many different reasons , what do you travel for ? S4
S4:
T : what about you S5 ?( S 6 /7 the same as above)
S5/6/7 :
T : any problems about paragraph 1 , if not let’s go on
T : turn to page 18 , here is a chart , now you are wanted to read the following two paragraphs carefully and do the chart , finding out the similarities and differences between hiking and rafting , remember if the item is not mentioned in the text , just escape it , ok ? I’ll give you 3 minutes to do it.
( 3’ later ) ( ask one of the students who does the work more quickly to write the answers on the blackboard)
( then check the answer in accordance to the screen)
`Activity 3 : talking
T : can you go rafting in wenzhou?
Ss: Yes ,
T : where can you go rafting ?
Ss : nanxi river
T : who has ever been to nanxi river ?
Ss :
T : What can you do in nanxi river ?
S1 :
T : ok , now look at the pictures on the screen, can you tell me which picture is more likely to be the rafting in the nanxi river ?
Ss : the left one .
T :Do you think going rafting in nanxi river is the same as the rafting in the picture ?
Ss: No
T : what is the difference ?
Ss:more dangerous….
( the differences between normal rafting and whitewater rafting )
Step 4 post reading
T: now you have known a lot about the text , turn to page 18, there are 5 multiple choices here, after you have read them choose one of them , ok ?
Ss ; ok
T : I’ ll give you1.5 minutes to do it .
( 1.5’ later)
T : No1, adventure travelers want to ________
( check the answers just in the book)
Step 4 summary and homework
Activity 1 : summary
In this class , we’ve read a passage about adventure travel. And we’ve learned something about hiking and rafting . I hope you’ll go hiking and rafting if there’s a chance .What’s more ,in your spare time , read some passages about other adventure travels to know something about them .
Activity 2 : homework
Preview the integrating skills part
Workbook : do the related exercises (the reading parts)
( time permitting , options :check the exercises of reading on page 101
discuss the tips of other adventure travels)
Period 3 : Reading Integrating skills and writing
Step 1 revision [reading ( useful expressions) ]
T :yesterday , we have got the general idea of the reading part , who can tell us what it is mainly about ?
S1: It’s mainly about the adventure travel , rafting and hiking .
T : Yes , very good . now let’s have a quick look at the text and explain some language points of the text .
( teacher retells some main sentences of the text which have language points and the language points will be shown on the screen )
T : Are you clear now ?
Ss :Yes .
T ; Very good . look at the blackboard , there are several multiple choices , you are to do the exercises to make sure that you all know them .
Step 2 integrating skills
Activity 1 reading
T : When people travel , what kind of travel do they usually make ?
S1 : hiking .
T : And what kind of travel is hiking ?
S1 : adventure travel
T : Yes , besides adventure travel , what is the other kind of travel ? you just go to Beijing to see the Great Wall , what’s it ?
S1: normal travel .
T : Good , have you ever heard of another kind of travel-eco-travel ?
Ss : No .
T : In yesterday ‘s debate , B said that tourism was bad for the ecology , for people had to cut trees to develop the lake . ( ecology )so in your opinion , does eco-travel have sth to do with ecology ?
Ss : Yes
T : look at the two words , do they have something in common ?
( write the words on the Bb)
Ss : the beginning 3 letters of the 2 words are the same .
T : Yes , the prefix eco – usually means “ o f ecology ” “ 生态的 ”
T : Now guess what an eco-travel is ? what do people make an eco-travel for ?
Ss :
T : Good , now turn to page 20 and read out the words above the table loudly ,try to find out the meaning of eco-travel and the differences between normal travel and eco-travel . I’ll give you 2 minutes .
( 2 minutes later)
T : Ok , S1 have you found out what eco-travel is ? ok , what’s it ?
S1 : Eco-travel is a form of travel that combines normal tourism with learning.
T : S2, can you tell us the differences ?
S2: normal tourism is bad for the environment and eco-travel can make the environment better , or at least understand it better .
Activity 2 talking about the eco-travel
T :Yesterday I surfed the Internet and noticed 2 places , they are very suitable for us to make an eco-travel , do you want to see what they are ?
( show the pictures on the screen )
T : How are they ? Are they good ?
Ss : yes .
T : One is the red river village in Viet nam , the other is snow mountain , it is longgu mountain
T : S2 , which one do you like better ?
S2 : Red river village .
T : suppose now you are making an eco-travel in the red river village , what can you do ? What can you learn ? What can you help do ?
( 3 students are required to do it .)
T : Good , now discuss in group of four , you can choose one of the 2 places and finish the red box , then send us a representative t o make a report to us , ok ?
You can do as _______
I think we should go to ________ , because we can __________and we can learn about _______
If we visit Red river village ,we can help __________
Step3 writing
T :Above all , wherever you go , you must make a schedule everyday . In that case , you will make good use of time and have a good time . Naturally , you will not waste money . I like traveling very much and have been to many places , last night I went to Japan and I had a good time so I wrote a letter to you , ( in my dream) , have you received it ?
( show a letter on the screen )
Qs : How many time points have I told you in the letter ?
What did I do yesterday ?
What am I doing today ?
What will I do tomorrow ?
( 4 Ss are to answer it )
T : Good , in writing a letter , you should use the past tense to indicate the things happend in the past , ( so does the present and future tense ) and pay attention to the form of the letter
T : Now look at my letter carefully and see whether there is anything wrong with it ?
S3 : the date , comma
T : Yes ,very good , thank you very much , so next time when you write a letter , pay attention not to make mistakes
Step 5 homework
T : Now comes your homework , please write a letter to your friend or teacher about the schedule of your trip like mine .before you start writing , you need to think about what you are going to write , list good ideas and make notes , you should pay attention to the form of a letter ( shown on the screen )
( option : do the exercises on useful expression and the tenses)
1.The girls _________(下班) work at five p.m.
2.______(当心)that you don’t get into trouble .
3.Clothing can _______(保护)us _____cold .
4.I __________(进行锻炼)every morning on the playground .
5.He ______(细心)with his homework .
6.He has _____________(徒步旅游)
7.He is tired , let me go _____(代替)
8.He is tired , let me go ________(代替) him .
9.Don’t _________(靠近) the tiger , it’s dangerous .
Period 4 :Listening
Step 1 greeting
T : Good morning , boys and girls
S: Good morning ,Miss Huang
Step 2 pre-listening
Activity 1 : listening to a song
(play a piece o f song 2 or 3 minutes before the bell rings )
T : Is it a lovely song ?
Ss: Yes .
T: what’s the beautiful place in the song
Ss: California hotel
T: California is a lovely place for us to travel . If you want to go there , how can you make it ,by plane or by train ?
Ss: By plane
Activity 2 : talking about boarding calls
T : ok, now listen to me carefully , and tell me where you usually hear it ?
“ Ladies and gentlemen , attention please , Flight BA 432 from Shanghai to Wenzhou is boarding at Gate A2 in 20 minutes , please get ready .”
T : Have you heard of it before ?
Ss : Yes
T : Where do you usually hear about it ?
S1 : In the airport
T : When does it usually happen ?
S2 : Before people get on the plane .
T : Yes , very good . we can also say “ board the plane = get on the plane”
T : Now listen to me again and try to find out how many messages there are in my broadcast
( the same as the above)
T : now can you see how many messages ?
Ss : 3
T : yes , very good , what are they ?
S3 : the flight number , the destination , gate number
T : yes, ok now look at the screen , do you know what it is
Ss: Boarding pass
T : yes , now let’s go through the pass and find out the flight number , the destination , and the gate
T : ok , now altogether
Ss :
Step 3 : listening
Activity 1 : listening to the tape and doing the exercises on P15 -1
T : now turn to page 15 , there are 3 boarding calls , you will listen to them once and write down the destination , the flight number and the gate of each call , and pay attention to some details , make notes while listening
( play the tape once )
T: Have you got it ?now , all together .
( if necessary , play it again )
T : Good , you have done a wonderful job , among the 3 calls , which one isn’t changed ? What is the origin of each flight ? What happens to No.3 flight ?
( play again for the details)
Activity 2 : arrange the order of the pictures on page 97
T : We can see that things always change without expectation , so when you want to go somewhere by plane , please arrive at the airport earlier . you can wait in the waiting hall , when you hear the boarding calls , you can begin boarding the plane , now comes the question , when you hear the boarding calls what other things will you have to do before you get on the plane ?
S1:
T : Ok, turn to page 97 , what are they doing ?
Ss:
T : yes , very good , arrange the pictures first by yourself before listening
T : S5 , what’s your result ?
S5 :
T : Ok , now let’s listen to the tape to see whether it’s right or not
( play the tape )
T : arrange the right order
Activity 3 : listening to the tape and doing the exercises on P16-2
T : Do you know how to board a plane now ?
Ss : yes
T : Good , since you know how to board a plane , so going abroad becomes much easier , if you have a lot of money , where would you most like to go , at home or abroad ?
S6/7/8 :
T : Ok , you have many choices and we can’t say which is better , which is worse . I have been to many places , I think I could be a good guide for you , now look at my suggestions to see whether you like it or not.
( show pictures and describe the pictures : the Forbidden city , tian anmen, mona lisa , Eiffel Tower – how can we go up to the top of the tower , penguine , polar bear , yangliwei )
T : 5 world travelers like them very much , they take my suggestions and they wrote 5 postcards for us about their trip , now turn to page 16 , listen to the tape and find out the answers to the table
( listen to each card after talking about each picture on the screen )
( play the tape again if necessary)
( listen to it again one by one and discuss some other information)
NO.2 What’s the color of the flag?
Do you know where the painting is kept ?
What’s France called in the postcard ?
NO3 . How long is the plane ride ?
NO 4 . How high can we jump ?
NO5 : How long have we had to swim to get here ?
Is there enough air below ?
Step 5 : homework
do the exercises on page 18 : word study
Page 99-100 practising
Period 5 :Language study
Step1 word study
T : ok , now open your book ,turn to page 19 , match the words and phrases . Yesterday I have asked you to finish it , have you done your homework ?
Ss : Yes .
T :Good , now let’s have a check .
Step 2 grammar
Activity 1 do some exercises to review the tenses
T :We have learnt a few tenses before ,such as the present tense , the past tense , the past perfect tense and so on . Now look at the screen , we’ll do an exercises to review them . I think 2 minutes is enough for you .
( 2 minutes later , check the answers )
T : Ok , are you ready ? let’s have a check .
( explain the tenses and list the table of 12 tenses on the screen )
1.Unless he ________(promise ) to help us , we shall lose the games .
2.It is five years since my dear aunt _____(leave) here .
3.I don’t know when he _________(come) , but when he _____(come), I’ll speak to him.
4.She___(be) poor in French , but she _______(do) her best to improve it .
5.I’m sorry I ______( forget) to tell him to come here for the meeting .
6.I ________(have) the bad cold for a week ,still I can’t get rid of it.
7.Tom told me that he _______(meet ) John and ______(give) him he message already .
8.She __always _______(work) when I go to see her .
9.He ________(do)his lessons from seven to nine last night .
10.He said he _______( be) free the next week
Activity 2 : talking about the changes of life in different time , using 3 different tenses
T : Look at me carefully , am I different today ?
Ss : yes
T : Ok , now what are the changes ?
Ss : Hair style
T :yes , things are always changing . times change and so does the way we live , many things we often do become easier and faster ,such as writing , reading , shopping and so on , do you know the ways of doing things in the past ? can you imagine the ways in the future .
T :ok , now look at the red chart on page 19 , for example , in the past we traveled by horse , today we travel by car/plane , in the future, we will perhaps travel by spaceship . try to fill in the blanks and read out yours answers as the examples in part three . are you clear ?
Ss: yes.
(teacher copies the chart on the Bb ,4 students are required to do it ,T write down the answers on the blackboard)
T : look at part 3 ,When you make the report , follow this :
In the past people…
Today people…
In the future , people will …
Activity 3 the future tense
T : so we can say , to express the future tense , we can use “ will do ”, what else ways can we use to express the future tense ?
Ss : be going to , be to do
T : Yes , quite right , now we’re going to learn another kind of expression about the future tense .
( Bb : will do, be going to , be to do ; while explaining the grammar , use Chinese properly)
T : turn to page 19, Jane and Betty are going on separate holidays in a few days’ time , ok, S1 and your partner , can you read out the dialogue for us
( S1 and his partner read the dialogue)
T : thank you , sit down please
There are quite a number of expressions to express the future tense , now please underline the verbs that express future , I’ll give you 2 minutes to do the job
(2’later)
T : S2 , please .
Ss : are off, be getting to …
( when S2 is speaking , write down the answers in the blackboard and explain some important phrases)
T : Very good , the verbs used are 移动性动词, can you think out other移动性动词 like go
Ss : arrive , reach.. come, stay , return, leave , start …
T : yes , usually , when present continuous tense is used as the future tense , it aims to function as
1) 表示即将发生的或预定中计划好的活动。
Are you staying with us this weekend? 这周和我们一起度周末吗?
We are leaving soon. 我们马上就走。
2) 渐变动词如：get, run, grow, turn become, begin及die。
Eg :He is dying.
移动性动词：go,come,return,arrive,get,reach,leave,meet,see off,take off,start,fly,stay等
3)与always, constantly, forever 等词连用，表示反复发生的动作或持续存在的状态，往往带有说话人的主观色彩。
You are always changing your mind
( shown on the screen)
Step 3 expressions for good wishes
T : If it’s my birthday today , what will say to me ?
SS : Happy birthday
T : In our everyday life , we often have to wish others
now read the dialogue again ,try to find out some expressions for good wishes .
( 30 seconds later)
T : Are you ready ?
T : What are they ?
Ss : Have a nice time in Guangzhou & have a good trip .
T : How should we respond ?
Ss : Thanks & the same to you .
( when Ss finish answering , show the answers on the screen )
T : and we have a lot of other expressions . How can we say“ 祝你好运 ”“新年快乐”， “圣诞快乐”，“ 国庆节快乐”…
( shown on the screen )
Step 4 homework
Finish the exercises on page 99-101(完成课后99-101练习)
Finish workbook(完成同步练习)
Step 5 consolidation ( option)
T : Now we’ll do an exercise to consolidate the tense reviewed and learnt today .
( shown on the screen )
1.There ___ an English evening next Saturday.
A will have B is to have
C is going to do D is going to be
2.You’d better set about doing your homework now , or it __ too late .
A is B was C has been D will be
3.The boy is ill , he ___ absent from school for at least a week .
A has to B is to C will have to D will have to be4. They don’t buy any new clothes because they ____money to buy a big house
A save B are saving
C is saving D were saving
5.How ___ you ___ on with your work recently ?
A do ;get B have ;got
C are ; getting D were ;getting
6. He __ out when it began to rain .
A is going B was going
【1】 在等比数列{an}中，a1＋a2＋a3=－3,a1a2a3=8 ①求通项公式，②求a1a3a5a7a9.【2】 有四个数，前三个成等差，后三个成等比，首末两项和37，中间两项和36，求这四个数.【3】等比数列{an}中，（1）、已知a24,a51，求通项公式.2（2）、已知a3a4a5=8，求a2a3a4a5a6的值.【4】 设{an}是等差数列，bn()n，已知b1b2b3an.5】 若数列{an}成等比数列，且an>0,前n项和为80，其中最大项为54，前2n项之和为6560，求S100=?
5、利用an，Sn的公式及等比数列的性质解题.【例6】 数列{an}中，a1=1，且anan＋1=4n，求前n项和Sn.解析：由已知得anan＋1=4n
……①
12a211，b1b2b3，求等差数列的通项88
1.理解功的概念：
(1)知道做机械功的两个不可缺少的因素，知道做功和工作的区别;
(2)知道当力与位移方向的夹角大于90时，力对物体做负功，或说物体克服这个力做了功。
2.掌握功的计算：
(1)知道计算机械功的公式W=Fscos知道在国际单位制中，功的单位是焦耳(J);知道功是标量。
(2)能够用公式W=Fscos进行有关计算。
二、重点、难点分析
1.重点是使学生在理解力对物体做功的两个要素的基础上掌握机械功的计算公式。
2.物体在力的方向上的位移与物体运动的位移容易混淆，这是难点。
3.要使学生对负功的意义有所认识，也较困难，也是难点。
三、教具
带有牵引细线的滑块(或小车)。
四、主要教学过程
(一)引入新课
功这个词我们并不陌生，初中物理中学习过功的一些初步知识，今天我们又来学习功的有关知识，绝不是简单地重复，而是要使我们对功的认识再提高一步。
(二)教学过程设计
1.功的概念
先请同学回顾一下初中学过的与功的概念密切相关的如下两个问题：什么叫做功?谁对谁做功?然后做如下总结并板书：
(1)如果一个物体受到力的作用，并且在力的方向上发生了位移，物理学中就说这个力对物体做了功。
然后演示用水平拉力使滑块沿拉力方向在讲桌上滑动一段距离，并将示意图画到黑板上，如图1所示，与同学一起讨论如下问题：在上述过程中，拉力F对滑块是否做了功?滑块所受的重力mg对滑块是否做了功?桌面对滑块的支持力N是否对滑块做了功?强调指出，分析一个力是否对物体做功，关键是要看受力物体在这个力的方向上是否有位移。至此可作出如下总结并板书：
(2)在物理学中，力和物体在力的方向上发生的位移，是做功的两个不可缺少的因素。
2.功的公式
就图1提出：力F使滑块发生位移s这个过程中，F对滑块做了多少功如何计算?由同学回答出如下计算公式：W=Fs。就此再进一步提问：如果细绳斜向上拉滑块，如图2所示，这种情况下滑块沿F方向的位移是多少?与同学一起分析并得出这一位移为s cos。至此按功的前一公式即可得到如下计算公式：
W=Fscos
再根据公式W=Fs做启发式提问：按此公式考虑，只要F与s在同一直线上，乘起来就可以求得力对物体所做的功。在图2中，我们是将位移分解到F的方向上，如果我们将力F分解到物体位移s的方向上，看看能得到什么结果?至此在图2中将F分解到s的方向上得到这个分力为Fcos，再与s相乘，结果仍然是W=Fscos。就此指出，计算一个力对物体所做的功的大小，与力F的大小、物体位移s的大小及F和s二者方向之间的夹角有关，且此计算公式有普遍意义(对计算机械功而言)。至此作出如下板书：
W=Fscos
力对物体所做的功，等于力的大小、位移的大小、力和位移的夹角的余弦三者的乘积。
接下来给出F=100N、s=5m、=37，与同学一起计算功W，得出W=400Nm。就此说明1Nm这个功的大小被规定为功的单位，为方便起见，取名为焦耳，符号为J，即1J=1Nm。最后明确板书为：
在国际单位制中，功的单位是焦耳(J)
1J=1Nm
3.正功、负功
(1)首先对功的计算公式W=Fscos的可能值与学生共同讨论。从cos 的可能值入手讨论，指出功W可能为正值、负值或零，再进一步说明，力F与s间夹角的取值范围，最后总结并作如下板书：
当090时，cos为正值，W为正值，称为力对物体做正功，或称为力对物体做功。
当=90时，cos=0，W=0，力对物体做零功，即力对物体不做功。
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