Module 3 Journey to space Unit 2 课件（共41张ppt） 外研版八年级下册

(共41张PPT)
Module 3
Unit 2
We have not found life on any other planet yet.
学习目标
重点探究
自主学习
学习导航
当堂检测
课堂总结
拓展提升
新课导入
outer space
新课导入
Yuri Gagarin,
Soviet Union
12 April, 1961
新课导入
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。
新课导入
爱德温·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。
新课导入
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。
学习目标
1.能记住并能正确运用下列单词和词组:
none,environment, that, solar, system, group,
galaxy,universe,light,impossible,out,communicate,solar system
2.能熟练地运用现在完成时来描述宇宙中太阳系的知识和人类对宇宙的探索
自主学习
New words and expressions
none
environment
that
solar
system
solar system
group
galaxy
pron.没有一人；没有一个
n. 环境
pron.那，那个（指代已被提及的事物）
adj.太阳的；与太阳有关的
n.系统；体系
星系；（犹指）太阳系
n.群；组
n.星系
自主学习
New words and expressions
universe
light
impossible
out
communicate
n.宇宙
n.光；光线；光亮
adj.（事情）办不到的，不可能的
adv.在远方
v.联系；交流
重点探究
Reading and vocabulary
1.Work in pairs. Look at the picture and talk about what you know about Chinese spaceships.
Shenzhou-9 is a manned spaceship.
———————————
Scientist think that there has been life on the earth for hundreds of millions of years.However,we have not found life on any other planets yet.
The earth is a planet and it goes around the sun.Seven other planets also go around the sun.None of them has an environment like that of the earth,so scientists do not think they will find life on them.The sun and its planets are called the solar system,and our solar system is a small part of a much larger group of stars and planets,called the Galaxy or the Milky Way.There are billionsof stars in the Galaxy, and our sun is only one of them.
Scientists have also discovered many other galaxies in the universe.They are very far away and their light has to travel for many years to reach us.So how large is the universe It is impossible to imagine.
Scientists have sent spaceships to the planet Mars to take photos.They have even sent spaceships to travel outside the solar system.However,no spaceship has travelled far enough to reach other stars in our Galaxy.
Scientists have always asked the questions:with so many stars in the universe,are we alone,or is there life out there in space Have there been visitors to the earth from other planets Why has no one communicated with us We do not know the answers...yet.
2.Read the passage and choose the best title for it.
Match the titles with the paragraphs:
Are we alone
B. Life on the earth.
C. Solar system is a small part in the galaxy.
D. Spaceships haven’t travelled far enough.
E. Universe is really large.
1
2
4
5
3
The earth is a star.
The sun is a star.
There is more than one galaxy in the universe.
3.Read the passage and check the true sentences.
√
√
4. The light from 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.
√
Read the passage again and answer the following questions.
1. Have we found any life on other planets
2. What is called solar system
No, we haven’t.
The sun and its planets are called the solar system.
3. How many planets are there in solar system
4. Have we discovered other galaxies in the universe
5. Is there life on other planets
Eight.
Yes, we have.
We don’t know.
The 1st Para. Questions:
1.How long has there been life on the earth
2.Have we found life on any other planets yet
There has been life on the earth for hundreds of millions of years.
No, we haven’t.
The 2&3rd Para.
2.Put the words and expressions from the smallest to the largest :_____________
A. galaxy B. planet C. solar system D. star E. universe
B
D
C
A
E
Which is true
A: Seven planets go around the sun.
B: there are only stars in the galaxy.
C. The solar system is larger than the galaxy.
D: the Environment of the earth is different from
that other planet in the solar system.
√
The 5th Para.
1.Have scientists discovered any life in outer space yet
No, not yet.
2.Is there life out the solar system in space
We do not know the answers…yet.
Is there life on other planets There are seven other planets in our ___________, but_________ of them has a(n) __________ like that of the earth. Spaceships from the earth have done surveys of the other planets, but they have not found any life there.
solar system
none
environment
communicate environment none
solar system universe
4. Complete the passage with the words and expression in the box.
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 believe that they will find it some day.
communicate
universe
communicate environment none
solar system universe
Writing
5.Look at the picture from a science story for children and answer the questions.
What have the scientists just received
(a massage from one of our spaceships)
They have just received a message from one of our spaceships.
Where has the spaceship landed (Mars)
What has the spaceship discovered (people on Mars)
3. Why have the people on Mars not sent us a message (do not know how to)
4. Why have the people on Mars not visited us on the earth (do not know how to)
6 Write a passage to describe the picture. Use your answers to the questions in Activity 5 to help you.
We have just received a message from our spaceship to Mars.
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 have not visited the earth because they don’t know how to fly to our planet, and they prefer life on Mars. They seem very happy on their planet. They have used parts from the other spaceships from the earth to make TVs, radios, etc. We hope they don’t do the same with this one.
Example
拓展提升
Language points
1. Scientists think that there has been life on the earth for hundreds of millions of years.
科学家认为地球上的生命已经有亿万年了。
millions of 数百万 hundreds of 数百
thousands of 成千上万 billions of 数十亿
e.g. There are billions of stars in the
Galaxy, and the sun is only one of them.
银河系中有数十亿颗恒星，太阳只是其中的一个。
2. The earth is a planet and it goes around the sun. Seven other planets also go around the sun.
地球是颗行星，它围绕着太阳转。此外还有七颗行星也围绕着太阳转。
太阳系的其他七颗行星：水星 (Mercury)、金星(Venus)、火星
(Mars)、木星(Jupiter)、土星(Saturn)、天王星(Uranus)、海王星(Neptune)。
3. None of them has an environment like that of the earth, so scientists do not think they will find life on them.
它们中没有一个有像地球这样的环境，因此科学家们认为在它们上面找不到生命。
none pron. 没有一人；没有一个;一点儿也没
none of … 表示（三个以上）一个也没有。做主语时，谓语动词可用单数或复数。
e.g. None of us _______ interested in the story.
我们中没有人对这个故事感兴趣。
None of us ________ been to the Mars.
我们中没一个去过火星。
is / are
has/have
4. So how large is the universe It’s impossible to imagine.
所以宇宙有多大？我们无从想象。
句型: It is + 形容词+to+动词原形，
意思是“做某事很……”。
e.g. __________________ these words.
读这些单词很难。
It is difficult to read
5. …with so many stars in the universe, are we alone, or is there life out there in space
with+名词+介词短语，表示伴随情况，意思是“带着……”。
e.g. Mr. Zhang is coming with a book in his hands.
张老师手里带着一书进来了。
alone在句中作形容词，不作定语只做表语，也可作副词。意思是“独自地”。
lonely意思是“孤独的”
e.g. She was alone in that room, but she didn't feel lonely.
她独自一人呆在那房间里，但是并不觉得孤独。
7. Why has no one communicated with us
为什么没人和我们联系？
1) no one意为“没有人”，多用来指人。当它用作主语时，谓语动词要用单数形式。
e.g. No one _____________ me.
没人能够理解我。
understands
none可用来回答how many或how much的提问，no one可用来回答who的提问
e.g. ①—How many birds can you see in
the picture
—_______.
② —Who is in the room
—________.
None
No one
2) communicate既可作及物动词，又可作不及物动词。作及物动词时，意为“表达，传达”；作不及物动词时，意为“沟通，交流”，常与介词with连用。
e.g. I asked your sister to communicate
my wishes to you.
I shall communicate with you
directly.
表达，传达
交流，沟通
当堂检测
一、用方框中所给词的适当形式填空
1.The earth is a planet and it _______around the sun.
2.The sun and its planets are ____________ the solar system.
3.Scientists have _________many other galaxies in the universe.
4.It is hard to___________ how large the universe is.
5.The teacher often tells that nothing is __________.　
goes
discovered
called
understand
impossible
go,call,discover,understand,possible
当堂检测
二、
根据汉语提示完成句子
1.这个森林里有数百万棵树。
There are___________ __________trees in the forest.
2.想象宇宙有多大是不可能的。
It’s_________ _________ ________how large the universe is.
3.我经常与我的启蒙老师联系。
I often______________ __________my first teacher.
4.太阳系只是宇宙中的一小部分。
The________ _______ is only a _________ _______ of the universe.
impossible　 to　 　 imagine
communicate　 　with
solar　 　system　
　small　 　part　
millions of
课堂总结
Module 3
Unit 2
重点句式：
There has been life on the earth.
However, we have not found life on any other planets yet.
It is impossible to imagine.
重点单词：
none,environment,that,solar,system,group,universe,light