Module 3 Journey to space Unit 2 We have not found life on any other planets yet课件（41张PPT）

2021年春外研版八下英语精品课件
Module 3 Journey to space
Unit 2
We have not found life on any other planets yet.
学 习 目 标
学习本单元新单词及短语：none, environment, that, solar, system, group, galaxy, universe, light, impossible, out, communicate, solar system;
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通过读写训练，能够了解中国阻塞太空探索领域取得的伟大成就，增强民族意识和民族自豪感。
能读懂以太空为话题的简单文章并能识别细节，并完成相关话题的写作任务；
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How many planets are there in the universe?
2. What are they?
Eight.
课 堂 导 入
They are Mercury(水星) Jupiter (木星) Venus(金星） Mars(火星）Earth(地球) Saturn(土星） Uranus(天王星） Neptune(海王星）.
Saturn 土星
Venus 金星
Mercury 水星
Jupiter 木星
Eight planets
Earth
Mars
Eight planets
Uranus 天王星
Neptune 海王星
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3. Is there any life on other planets?
No, maybe we can find it in the future.
课 堂 导 入
Scientists are trying to find life on other planets.
Let’s see what they did in the past.
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Yuri Gagarin,
Soviet Union
12, April,1961
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1968 年12月27日,阿波罗8号——第一次载人的月球行动，在完成了历时六天的历史性航行之后，安全返回地球。
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1986年1月28日,“挑战者”号航天飞机在肯尼迪航天中心发射升空不久后爆炸。
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埃德温·艾尔德林
环绕地球飞行
的宇航员每“天”
可以看见16次日
出和16次日落。
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Who is he?
He is China’s first astronaut.
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The Shenzhou-V spacecraft orbited the Earth 14 times.
The space flight lasted 21 hours by Yang Liwei in October, 2003.
Yang Liwei was called “China’s first astronaut”.
Shenzhou-9 is a man-made spaceship.
Work in pairs:
What do you know about it？
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1. Anyone out there?
2. Life on earth
3. The sun and the stars
4. The stars at night
Fast reading:
Read the passage and choose the best title for it.
Reading
√
Reading
Read Para 1 and answer the questions.
1) How many years do the scientists think has there been?
2) Have we discovered life on other planets?
Careful reading
For hundreds of millions of years.
No, they haven’t.
A. galaxy
B. planet
C. solar system
D. star
E. universe
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A
B
C
D
E
Careful reading:
1. Read para 2 and match the words with pictures.
galaxy, planet, solar system, star, universe

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2
1
3
4
5
Careful reading:
2. Then put the words in the box in order: small –-- large.
planet
star
solar system
galaxy
universe
Read Para 3--4 and complete the table.
Careful reading
{5940675A-B579-460E-94D1-54222C63F5DA}What scientists have done
What we don’t know/can’t do
_____________________________in the universe
It is impossible to imagine _________________
_____________________ Mars to ____________
No spaceship has traveled _______________ other stars.
send spaceships to _____________________________
discover many other galaxies
how large the universe is
send spaceships to
far enough to
take photos
travel outside the solar system
Read Para 5 and find out sentences with present perfect tense(现在完成时态).
Careful reading
Scientists have always asked the questions…
Have there been visitors to the earth from other planets?
Why has no one communicate with us?
Listen and read. Check (√) the true sentences.
1. The earth is a star.
2. The sun is a star.
3. There is more than one galaxy in the universe.
4. The light from the stars in other galaxies has travelled for a long time to reach us.
5. Scientists have received many messages from space.
6. Spaceships have visited most of the universe.
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(×)
(√)
(√)
(√)
(×)
(×)
Reading
Reading
Listen and read
Listen and read after the tape.
Read in groups.
Act out.
Read the phrases in the conversation and put them into Chinese.
成百的
发现生命
好几百万的
围绕…转
hundreds of
millions of…
find life
4. go around
5. none of…
billions of
in the universe
send spaceships to the planet Mars
far enough
communicate with…
……中没有一个
好几十亿的
在宇宙中
把宇宙飞船发送到火星
足够远
与…交流
Reading
联想：具体数字的表达: 数字+hundred /thousand/million
联想：no one没有人
联想：enough water足够的水
1.However, we have not found life on any other planets yet.
但是，我们在其他星球上还没有发现生命。
other 形容词，意为“其他的”，用于修饰名词。
辨析： the other (s)与other (s）：
(1) the other与other后可加名词; the others与others后不加名词；
(2) the other (s)表示一定范围内除去一部分以外后其余的全体；other (s)表示除去一部分以后的（一些）,但不是剩下的全体。
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Language points
One flower is red, the other (one) is white.
一朵花是红的，另一朵 (花) 是白的。
Give me some other apples/others, please!
请另给我一些（苹果）吧！
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Language points
It is taller than many other buildings.
它比许多其他的建筑物都高。
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2. None of them has an environment like that of the earth. 它们中没有一个有像地球这样的环境。
辨析：no one与none：
no one同义词为 nobody, 只用于指人，其后不跟of短语，作主语时谓语用单数，no one 只能回答who提问的问句。
(2) none用于表示对三者或三者以上全部否定，既可指人，也可指物,常用语短语none of+名词复数/代词，表示”…中没有一个”。
作主语时，谓语可以是单数，也可以是复数; none的反义词是all, none可与of连用; 可以用来回答How many 或 How much提问的问句。
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（1）None of us are/is interested in the story.
我们没有人对那个故事感兴趣。
None of the students in this class has been to England .
这个班没有一个同学去过英国。
（2）—Who are you speaking to? 你在跟谁讲话？
—No one. 没人。
（3）—How many students are there in the room? 房间里有多少个学生?
—None. 一个也没有。
3. With so many stars in the universe, are we alone？
宇宙中有这么多的恒星，我们是唯一的吗？
辨析：alone与lonely
（1）alone既可作形容词，又可作副词,意为“单独的/地，独自的/地”，没有感彩。
She is afraid of going out alone at night.
晚上她害怕一个人出去。
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(2) lonely形容词，意为“孤独的，寂寞的”，具有感彩。
He lived alone after his wife left，so he was very lonely .
他妻子离开后，他一个人生活，所以他很孤独。
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Did you feel lonely when you are at home alone?
你自己一个人在家时感到孤独吗？
Complete the passage with the words and expression in the box.(A4)
Is there life on other planets? There are eight planets in our ____________, but_________ of them has a(n) _____________like that of the earth. Spaceships from the earth have done surveys of other planets, but they have not found any life there. Why has no one from other planets tried to _____________ with us? It is true that scientists have not discovered life on other planets in the ________yet, but some scientists do not ______ that they can find it some day.
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solar system
environment
none
communicate
universe
doubt
communicate doubt environment none solar system universe
Practice
— What have the scientists just received? (a message from one of our spaceships)
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— They’ve just received a message from one of our spaceships.
Look at the picture from a science story for children and answer the questions.(A5)
Practice
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1. Where has the spaceship landed? (Mars)
2. What has the spaceship discovered? (people)
3.Why have the people on Mars not sent us a message? (don’t know how to)
4. Why have the people on Mars not visited us on earth? (don’t know how to)
We’ve just heard that our spacecraft has landed on Mars, and we’ve discovered…
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Write a passage to describe the picture. Use your answers to the questions in Activity 5 to help you.
Writing
We have just received a message from our spaceship to Mars. Our spaceship has discovered aliens there. They have never sent us a message because they don’t know how to communicate with us. They haven’t visited the earth because they don’t know how to fly to our planet, and they prefer life on Mars. They seem vey happy on their planet. They have used parts from the other spacecraft from earth to make TVs, radios etc. we hope they don’t do the same with this one!
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Possible version:
一、根据句意写出所缺单词。
1. Everyone knows ________ travels much faster than sound.
2. _______ of us like this bad TV programme.
3. The flowers will _______ well if they get enough water.
4. The solar system is a small part of our ________.
5. We haven’t ________ life on other planets yet.
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light
None
grow
galaxy
found
课 堂 达 标
二、句型转换。
1. I have been to America before.（变成一般疑问句）
_________________________________
2. have, finished, not, I, homework, my（连词成句）
_________________________________
3. She _______________ the Great Wall twice.（has gone to/has been to 填空）
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Have you been to America before?
I have not finished my homework.
has been to
4. I learned more than 1,000 new words last year.（用so far 改写句子）
5. I think he will come to your birthday party.（改为否定句）
I _______ _______ _____ ______ come to your birthday party.
6. She has already come back from Hong Kong.(改为否定句)
She has ________ come back from Hong Kong _________.
I have learned more than 1000 new words so far.
don’t think he will
not yet
三、根据汉语意思完成句子。
他们花费了数亿元建造这座大桥。
They spent _________ ___ ______ ____ yuan building the bridge.
2. 宇宙中有多少星星围着太阳转？
How many planets in the universe _______ _______ the sun?
3. 我们在其他行星上海没有发现生命。
We __________________ ____ on other planets.
hundreds of millions of
go around
found/discovered life
4.我们班没有一个学生害怕困难。这个孩子足够大了，能照顾自己了。
______ _____ the students is afraid of difficulties in our class.
5. 然而， 还没有宇宙飞船到过足以大大我们系其他恒星那么远的地方。
However, no spaceship has travelled _____ _______ ______ reach other stars in our Galaxy.
6. 这个老人没有儿女， 他自己生活。
the old man has no son _______ daughters. He lives ________.
None of
far enough to
or
alone
1. Read the passage.
2. Correct your writing.
Homework
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