Module 3 Unit 2 We have not found life on any other planets yet 课件(共29张PPT)

(共29张PPT)
Module 3
Unit 2
We have not found life on any other planets yet.
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
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
2
1.There are many stars in the______.
A.universe B.system C.space travel D.spaceship
2.It's____for us to make the poster in one day.
A.hardly B.impossible C.friendly D.small
3.It's interesting when you go for a visit and____photos with your friends.
A.take B.took C.taken D.takes
预习检测
B
A
A
4.Parents should often communicate______their children.
A.at B.to C.with D.for
5.I'm sorry you've missed the train.It___10 minutes ago.
A.left B.has left C.was leaving D.leaves
A
C
知识梳理
1.None of them has an environment like that of the earth...
辨析:none与nothing
（1）none可与of连用;谓语动词用单数或复数;可指人或物;强调数量概念;一般用来回答how many +n.,how much +n.及含any+n.引起的疑问句。
例如: —How many students are there in the room 房间里有多少学生
—None.没有人。
（2）nothing指物,谓语用单数,强调内容,一般用来回答含anything的一般问句及what引起的特殊问句。例如:
—What is in the box 盒子里有什么 —Nothing.没有东西。
做一做:单项选择。
1.—How much money do you have on you
—______. 　 　　　　 　　　　
A.None B.No one C.Nothing D.Nobody
2.I want some coffee, but there is______in the pot.
A.no one B.something C.none D.nothing
A
C
2.It's impossible to imagine.
impossible表示“不可能的”。
It's impossible (for sb.) to do sth.意为“对于某人来说是不可能的”。例如:
Nothing in the world is impossible if you set your mind to do it.
如果你决心去做,这个世界上没什么是不可能的。
做一做:单项选择。
1.It's_____for a boy of 5 to finish this hard work.
A.important B.impossible C.easily D.hardly
2.______is impossible for the workers to stop to have a rest because there is too much to do.
A.That B.This C.It D.One
B
C
用现在完成时描述宇宙中人类对宇宙的探索
重点探究
人类探索火星之旅
2. Read the passage and choose the best title for it.
———————————
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.
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.
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.
√
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)
Why have the people on Mars not sent us a message (do not know how to)
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.
Example
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.
特殊疑问句
特殊疑问句要由疑问代词或疑问副词开头，询问的内容不同, 使用的疑问词也不同。
我们学过的疑问词有what（询问事物）, how much（询问价格）, what time （询问时间，尤其是点钟）, what kind of（询问种类）, why（询问原因），who（询问人）, where（询问地点） 等等
特殊疑问句由疑问词开头，其构成是“疑问词 一般疑问句”
特殊疑问句不能用yes, no来回答，而应根据它所询问的内容直接做出回答才行。
通过以上活动，我们知道，叙述经历时需要涉及三个方面：
————————————————————————
————————————————————————
————————————————————————
活动小结
where you went
when you went there
why it was special
当堂检测
1.The natural__________(环境) is very important for us.
2.This_______(体系) is the newest in our library.
3.Is this one_______(星系) or two
4.Scientists can find more secrets of the________(宇宙).
5.The sun gives us_______(光;光线).
一、根据句意及汉语提示填写单词。
environment
system
galaxy
universe
light
当堂检测
1.我们改变他的主意是不可能的。
It's_________for us to change his mind.
2.海王星是我们太阳系里的第八颗行星。
Neptune is the eighth planet of our_______ _______.
3.拍照前,别忘了先买底片。
Don't forget to buy films before you_______ _______.
4.我还没得到进一步的信息。
I have_____got any further information______.
二、根据汉语提示完成句子。
impossible
solar　 system
take　 photos
not
yet
重点句子：
None of them has an environment like that of the earth...
It's impossible to imagine.
重点单词和短语：
none,environment, that, solar, system, group, galaxy,universe,light,impossible,out,communicate,solar system
Module 3
Unit 2
课堂总结