外研版 (新标准)八年级下册Unit 2 We have not found life on any other planets yet授课课件ppt

这是一份外研版 (新标准)八年级下册Unit 2 We have not found life on any other planets yet授课课件ppt，文件包含M3Unit2Wehavenotfoundlifeonanyotherplanetsyet-2PPT课件pptx、M3Unit2Wehavenotfoundlifeonanyotherplanetsyet-3学习任务单docx等2份课件配套教学资源，其中PPT共48页， 欢迎下载使用。

1. Hw many astrnauts have been t Mars? A. 3. B. 2. C. 1. D. 0.
What d yu knw abut space travel?
2. Have scientists discvered life n Mars? A. Yes. B. N.
3. Hw many planets g arund the sun? A. 6. B. 7. C. 8. D. 9.
Mercury Venus Earth MarsJupiter Saturn Uranus Neptune
the slar system太阳系
the Galaxythe Milky Way银河系
the universe
4. D yu knw abut Chinese spaceships?
is a manned spaceship.
Remember these wrds and expressins.
slar adj. 太阳的 system n. 系统slar system 太阳系galaxy n. 星系5. universe n. 宇宙
Read the passage and chse the best title fr it.
1. Anyne ut there? 2. Life n the earth3. The sun and ther stars4. The stars at night
Let’s chse the best title.
Scientists think that there has been life n the earth fr hundreds f millins f years. Hwever, we haven’t fund life n any ther planets yet.
Paragraph 1
Scientists have always asked the questins: with s many stars in the universe, are we alne, r is there life ut there in space? Have there been visitrs t the earth frm ther planets? Why has n ne cmmunicated with us? We d nt knw the answers… yet.
Paragraph 5
cmmunicate v.
Read the beginning and the end f a passage and try t get the main idea.
plantswild animalsclean water…
Hw did life n the earth begin?Are many animals in danger? …
sizedistancecmpare…
Which star is the largest ne? What’s the difference between the sun and ther stars? …
farbrightbeautiful…
Which star is the clsest ne? Why can we see the stars clearly at night? …
What des “there” mean?Des it mean “the space”?Wh is asking this questin?What have scientists dne t try t get the answer?
Read the passage and check (√) the true sentences.
1. The earth is a star. 2. The sun is a star. 3. There is mre than ne galaxy in the universe. 4. The light frm the stars in ther galaxies has travelled fr a lng time t reach us. 5. Scientists have received many messages frm space. 6. Spaceships have visited mst f the universe.
1. The earth is a star.
2. The sun is a star.
3. There is mre than ne galaxy in the universe.
4. The light frm the stars in ther galaxies has travelled fr a lng time t reach us.
5. Scientists have received many messages frm space.
6. Spaceships have visited mst f the universe.
Understanding a passage shuld be based n the text.
1.We have nt fund life n any ther planets. 2. There are sme reasns.3. The universe is t large.4. There are still lts f questins. 5. N spaceship has reached ther stars.
We have nt fund life n any ther planets.
There are sme reasns.
There are still lts f questins.
Intrductin
The universe is t large.
N spaceship has reached ther stars.
Language fcus
1. … Nne f them has an envirnment like that f the earth, s scientists d nt think they will find life n them. …
nne prn. 没有一人，没有一个 envirnment n. 环境that prn. 那，那个
2. ... with s many stars in the universe, are we alne, r is there life ut there in space?
e.g. With s many things t d, we have n time t watch TV.
cmmunicate v. 联系；交流 envirnment n. 环境nne prn. 没有一人; 没有一个 slar system 太阳系 universe n. 宇宙
Let’s review the wrds.
cmmunicate envirnment nne slar system universe
Cmplete the sentences with the wrds.
Is there life n ther planets? There are seven ther planets in ur ，but f them has a (n) like that f the earth. Spaceships frm the earth have dne surveys f the ther planets, but they have nt fund any life there. Why has n ne frm ther planets tried t with us? It is true that scientists have nt discvered life n ther planets in the yet, but sme scientists believe that they will find it sme day.
slar system
We d nt knw the answers … yet.
Anyne ut there?
Lk at the picture and answer questins.
What have the scientists just received?
They have just received a message frm ne f ur spaceships.
1. Where has the spaceship landed? (Mars)
The spaceship has landed n Mars.
2. What has the spaceship discvered? (peple n Mars)
The spaceship has discvered peple n Mars.
3. Why have the peple n Mars nt sent us a message? (d nt knw hw t)
Peple n Mars have never sent us a messagebecause they dn’t knwhw t cmmunicate with us.
4. Why have the peple n Mars nt visited us n the earth? (d nt knw hw t)
Peple n Mars have never visited us n the earth because they dn’t knw hw t fly t ur planet.
Write a passage.
Use yur answers t the questins in Activity 5 t help yu.
We have just received a message frm ur spaceship t Mars. This is ur 20th spaceship t Mars. Luckily ur spaceship has discvered peple n Mars there. After a lng talk, we have knwn mre abut them. They have never sent us a message because they dn’t knw hw t cmmunicate with us. They have nt visited the earth because they dn’t knw hw t fly t ur planet, and they prefer life n Mars.
We have dne surveys f many planets and we are very excited t get gd news frm Mars. We believe we will receive messages frm ther planets if we keep trying.
1、请跟读课文录音并大声朗读。2、请将练习6的文章进行打磨修改， 写出第二稿。3、请查阅更多有关人类探索太空的资料。