仁爱科普版九年级上册Unit 4 Amazing Science Topic 2 Section C课件(共21张PPT，内嵌音频)

(共21张PPT)
Unit 4 Amazing Science
Topic 2 I’m excited about the things that will be discovered in the future.
Section C
Teaching aims
1.Knowledge aims：
Words and phrases: Words and phrases: storm, weigh, journey, excitement, generally, limit, be named after sb., as…as…, at a distance of …, It takes…to do sth.
Sentences: Its diameter is 53% as wide as that of the earth.
You can tell which planet is Mars because it is bright, red in the night sky.
The gravity on the surface of Mars is about two-fifths as strong as it is on earth.
It takes a spaceship about eight months to reach Mars from the earth
It has been two days since we landed on Mars.
2. Skill aims: Let students use the future passive voice in listening, speaking and writing.
3. Key points:
Grammar: the Future Passive Voice
4. Difficult points：
Its diameter is 53% as wide as that of the earth.
It has been two days since we landed on Mars.
1.到火星的太空飞行
2.参加，加入
3.去太空旅行，遨游太空
4.新的事物
5.在电视上
6.长大
7.掌握一些基本的电脑技术
8.在舞台上
9.比起……更喜欢……
10.对……感到激动
11.实现某人的梦想
12........的形状
13.偶然地
14.知道，了解
Revision in class
1.the space flight to Mars
2.take part in/join in
3.travel into space
4.something new
5.on TV
6.grow up
7.master some basic computer skills
8.on the stage
9.prefer...to...
10.be excited about...
11.realize one's dream
12.the shape of....
13.by chance= by accident
14.know about
1. 语法： 被动语态
1) 一般将来时的被动语态，其结构为：will be+动词的过去分词. 也可以用作“be going to be+及物动词的过去分词”，表示“计划、打算、安排的事将被执行”。
e.g. The operation is going to be had in the afternoon.
He will be met at airport by his friend.
Will an English contest be held next Saturday afternoon
You will not be allowed to go out if you don’t finish your homework.
2) 一般现在时态被动语态 is/am/are+ done
eg. Many spaceships are sent into space by China.
3) 一般过去时态被动语态 was/were + done
eg. Spaceship V was sent into space in 2003.
4) . 有情态动词的被动语态，结构为“情态动词+be+及物动词的过去分词”。
e.g. Trees can be planted in spring.
Revision in class
1a. Read and understand.
Look at the pictures and predict which statements are true about Mars. Then read the passage quickly and check the answers.
_____ 1. Mars looks like a red ball.
_____ 2. The temperature on Mars is very high.
_____ 3. Mars is much larger than the earth.
_____ 4. Mars is too far away for us to reach.
T
F
F
F
1b Read 1a again and write down the information about Mars.
Diameter Color Shape
Climate Gravity Distance from the sun
53% as wide as that of the earth
red and orange
a ball
during spring and summer: strong storms temperature: between-138℃and 28℃
about two-fifths as strong as it is on earth
about 228 million kilometers
1. Does Mars have a good climate for plants
2. Is Mars a useful place to dry fruit
3. Is Mars a good place for human beings to live
4. Is Mars a comfortable place for heavy people
No. Because during spring and summer, the surface of Mars is covered by strong storms. And The temperature on Mars is between -138℃ and 28℃. The air has only 0.13% oxygen.
1c. Discuss the crazy questions with your partner and state your reasons.
Yes. The temperature on Mars is between -138℃ and 28℃. The air has only 0.13% oxygen.
No. Because the air has only 0.13% oxygen.
Yes. Because The gravity on the surface of Mars is about two-fifths as strong as it is on earth.
Language Points
1. name（动词），意为“命名，给......取名”，后接双宾语，构成：
name sb./sth. +名称。
e.g. They named their son Bruce.
name ... after ... 意为“给......取名”。
e.g. We named China’s first lunar probe after Chang’e.
be named after... “（被）以......命名”，是被动语态的形式。
e.g. China’s first lunar probe was named after Chang’e.
2. as ... as...意为“和......一样”，中间接形容词或副词的原级。
否定式为not as ... as ...， 意为“不如......那样......”
3. go around意为“环绕，绕着”
4. distance（可数名词），意为“距离” distant（形容词），意为“遥远的”
Language Points
at a distance of意为“相隔”；at a distance意为“在远处”
5. cover ... with ... 意为“把......用......盖住”
e.g. Ann covered her face with her hands.
be covered with = be covered by “被......覆盖着”
e.g. The ground is covered with/by thick leaves.
② cover（可数名词），“封皮，封面”
6. weigh（及物动词），意为“重，有多重”
e.g. The large stone weighs over 10 tons.
weight（不可数名词），意为“重量；分量”
e.g. What’s your weight？ = How much do you weight？
7. t takes +主语+some time to do sth. 做某事花了（主语）多长时间。
Language Points
8. worth（形容词），意为“值得，有......价值的”，常用短语有：
① be worth doing sth. 意为“值得做某事”
e.g. The place is worth visiting.
② be worth +钱 意为“值多少钱”
e.g. The picture is worth 30￥.
③ be worth +名词 意为“值得......”
e.g. I don’t think it’s worth our work.
9. 倍数的表达法
A+be+倍数+as+adj./adv.原级+as+B
A+be+倍数+adj./adv.比较级+than+B
e.g. Its diameter is 53% as wide as that of the earth. = Its diameter is 53% wider than that of the earth.
Language Points
10. worth（形容词），意为“值得，有......价值的”，常用短语有：
① be worth doing sth. 意为“值得做某事”
e.g. The place is worth visiting.
② be worth +钱 意为“值多少钱”
e.g. The picture is worth 30￥.
③ be worth +名词 意为“值得......”
e.g. I don’t think it’s worth our work.
11. search for :表示没有“被搜索的对象” 只有“寻找的目标” 。
e.g. All night they searched for the lost boy.
search… for…表示搜查某一对象的目的是要找到什么, 强调有具体的目标。
e.g. She searched many shops for Jim’s gift.
Language Points
search 意为“在……搜查”或“搜身”, 是个及物动词，后面直接跟“被搜查的对象”。如：
Mr.Smith searched every room in the house.
12. It is (has been) + 一段时间 + since。
e.g. It is a long time since they left. = It has been a long time since they left.
2. Kangkang’s uncle sent an e-mail to him from Mars. Choose the right words to complete the letter.
Hi Kangkang,
It has been two days_________( since ,from) we landed on Mars. It _________(cost, took) us more than two years to_________ (reach, get) here. Generally, the journey went well, but the living conditions were_______( quiet, quite) bad during the journey. We had to produce most of the food in the spaceship. ______________(What’s more, What’s worse), our water supplies were very low. We had to limit the use of water during _________(those, these) days. So we had a shower every six weeks. We will spend another seven hundred and sixty-three days on Mars. __________( How, What )a long time! I often miss the family, but the excitement of being on Mars is worth it!
Wish me luck!
Yours,
Uncle Stephen
since
took
get
quite
What’s worse
those
What
Read 2 and answer the questions.
(1) Who is this e-mail from and to
It is from Uncle Stephen to Kangkang.
(2) How long did it take them to get there
More than two years.
(3) Did everything go well during the journey
No, it didn’t.
3a. Write back an e-mail to Uncle Stephen for Kangkang and ask him for more information about Mars. The list may help you.
clothing food and drinks
weather transportation
…
3b Work in pairs. Check your partner’s e-mail and use your knowledge of Mars to answer the questions for Uncle Stephen.
Dear Uncle,
I’m very glad to receive your e-mail, and I know that the living conditions were quite bad during your journey. I am interested in the information about Mars. Can you tell me more about it How about the weather on Mars Is it very cold What kind of transportation do you use there I am looking forward to your e-mail!
Good luck!
Yours,
Kangkang
Revision in class
1.太……以致于不能……
2.看起来像
3.以……命名
4.和……一样……
5.围绕……转
6.相隔……远的地方
7.被覆盖……
8.做某事花费某人一段时间
9.离……近
10.寻找
11.更糟的是
12.值得(做)某事
13.自从...有多久
1.too...to...
2.look like
3.be named after
4.as+adj./adv.+as...
5.go/move/travel around...
6.at a distance of...
7.be covered by/with...
8.It takes sb.some time to do sth.
9.be close to...
10.search for
11.what's worse=even worse
12.be worth(doing)sth.
13.It is (has been) + 一段时间 + since
Revision in class
1. The moon goes around the earth ______ a distance of about 380,000 kilometers.
A. is B. for C. with D. at
2. It ______ a long time since we reached Beijing.
A. are B. was C. has been D. had been
3. —Don’t throw about your newspaper!
—Sorry, I’m busy now. They will _____ later.
A. collect B.be collect C.be collected D. collected
4. It ______ me three hours to finish the work.
A. spends B. takes C. costs D. pays
5. Many trees and flowers _____ in our school last year and they made our school a beautiful garden.
A. have planted B. are planted C. were planted D. will be planted
6. ----Is Mars bigger than earth ----No. It’s about ______the earth.
A.as big as B.as bigger as C.the same big as D.a quarter as big as
7. My best friend was late for class.______ ,she left her bag at home.
A.What’s more B.However C.What’s worse D.Even though
8. The famous painting was named______Autumn.
A.to B.as C.for D.after
D
C
C
B
C
D
C
D
We learn: 1. Some words: storm, weigh, journey
2. Some phrases: name after, as …as, at a distance of, search for
3. Some sentences:
(1) Its diameter is 53% as wide as that of the earth.
(2) It has been two days since we landed on Mars.
We can : 1. Talk about something more about Mars.
2. Write back an e-mail.
Summary
1. Read 1a.
2. Memorize the useful expressions and key sentences which we learned today.
3. Finish Section C in your workbook.
4. Review Sections A-C.
Homework