初中英语Unit 2 We have not found life on any other planets yet备课ppt课件

这是一份初中英语Unit 2 We have not found life on any other planets yet备课ppt课件，共43页。PPT课件主要包含了A行星，B银河系，C星系，D恒星，E太阳系，F宇宙，Task 1，P20，已经有，数亿年上亿年等内容，欢迎下载使用。
一般认为，宇宙产生于140亿年前一次大爆炸中。大爆炸后，分子碰撞，产生光、热。大爆炸后30亿年宇宙，最初的物质涟漪出现。大爆炸后20亿～30亿年，类星体逐渐形成。大爆炸后100亿年，太阳诞生。38亿年前地球上的生命开始逐渐演化。
由两颗或两颗以上星球所形成的绕转运动组合体叫做星系，是宇宙中最大、最美丽的天体系统之一。人们已在宇宙观测到约一千亿个星系。有的离我们较近可以清楚地观测到它们的结构；有的非常遥远，目前所知最远的星系离我们将近一百五十亿光年。
银河系是由恒星和星系物质组成的巨大的、盘状系统，太阳系位于银河系中。银河系中众多繁星的光形成银河，成为环绕夜空外形不规则的发光带。银河系是构成宇宙的亿万个星系中的一个。
太阳系是以太阳为中心，有8颗行星、至少165颗已知的卫星、5颗已经辨认出来的矮行星和数以亿计的太阳系小天体。依照至太阳的距离，行星依序是水星、金星、地球、火星、木星、土星、天王星和海王星。8颗行星中的6颗有天然的卫星环绕。
YUri Gagarin,
1961年4月12日，苏联发射世界第一艘载人飞船“东方”1号，是世界上第一个载人航天器。苏联航天员加加林乘飞船绕地飞行108分钟，安全返回地面，成为世界上进入太空飞行的第一人。
1968 年12月27日, 阿波罗8号(Apll 8)——第一次载人的月球行动, 在完成了历时六天的历史性航行后, 安全返回地球。
美国“阿特兰蒂斯”号航天飞机（STS Atlantis ）与国际空间站成功实现对接
“嫦娥一号”月球探测卫星于2007年10月24日在西昌卫星中心发射升空。2009年3月1日成功撞击月球，为我国探月一期工程画上圆满句号。
“嫦娥二号” 于2010年10月1日成功升空对月球虹湾地区进行高清晰度拍摄,将为嫦娥三号卫星发射和着陆做好准备。
“嫦娥三号”“怀抱”中国首辆月球车“玉兔号”飞天落月。
“神舟五号”飞船是我国第一艘载人飞船，乘有一名航天员，在轨道运行了一天。将航天员的生理数据、电视图像发送地面，中国成为第三个有能力独自将人送上太空的国家。
Fei Junlng Nie Haisheng
“神舟六号”与“神舟五号”在外形上没有差别，为推进舱、返回舱、轨道舱结构，重量在8吨左右，用长征二号F型运载火箭发射。它是中国第二艘搭载太空人的飞船，是中国第一艘执行“多人多天”任务的载人飞船。
the Shenzhu-8 manned spaceship
“神舟八号”发射升空后，与天宫一号对接，成为一座小型空间站。
“神舟九号”载人宇宙飞船，2012年6月16日18时37分发射，与天宫一号实施自动交会对接，是中国实施首次载人空间交会对接。并于2012年6月29日10点00分安全返回，这也是载人航天飞船首次在夏季发射。
the Shenzhu-9 manned spaceship
Mdule 3 Jurney t space
Unit2We have nt fund life n any ther planets yet.
Unit2 We have nt fund life n any ther planets yet.
---reading fr main ideas
slar system
Brainstrming
=the Milky Way
What things can yu think f(你会想到什么)?
1. the Galaxy2. planet 3. slar system4. star 5. galaxy 6.universe
Match the wrds with the meanings in Chinese.
1. Anyne ut there?2. Life n Earth3. The sun and ther stars4. The stars at night
Read the passage and chse the best title fr it.
Anyne ut there?
Read Paragraph 1 and chse the main idea fr it.
What's the main idea f Paragraph 1?
B.Scientists haven't fund life n any ther planets.
A.Scientists have fund life n sme ther planets.
Where can we find the main idea?
Tip1:Pay attentin t the last sentence.
N,we haven't.
There has been life fr hundreds f millins f years.
Read Paragraph 1 again and answer the questins.
Read Paragraph 2 and chse the main idea fr it.
What's the main idea f Paragraph 2?
A.The earth is a planet and it ges arund the sun.
B.It tells us smething abut the slar system and the Galaxy .
C.There are billins f stars in the Galaxy,and ur sun is nly ne f them.
Tip2:Pay attentin t the key wrds.
Read Paragraph 2 and check(√)the true sentences.
1.The earth is a star.
2.The sun is a star.
3.There are seven planets in the slar system and they g arund the sun.
4.There is nly ne star in the Galaxy.
There are billins f stars
The earth ges arund the sun,and______ther planets g arund the sun t.The sun and its planets are called__________________.Our slar system is part f________________.There are________ stars in the Milky Way,and ur________ is nly ne f them.
Read Paragraph 2 and fill in the blanks.
the slar system
r the Milky Way
Read Paragraph 3 and chse the main idea fr it.
What's the main idea f Paragraph 3?
B.It's impssible t imagine.
A.Scientists have discvered many ther galaxies.
Where can we find the main ideas?
Tip3:Pay attentin t the first sentence.
1. There is ne galaxy in the universe.
2. The light frm the stars in ther galaxies has t travel fr a lng time t reach the sun.
3. Scientists can imagine hw large the universe is.
There are mre than ne/many ther galaxies
Read Paragraph 3 and crrect the mistakes.
/the earth
Read Paragraph 4 and chse the main idea fr it.
What's the main idea f Paragraph 4?
A.Scientists have sent spaceships t the planet Mars t take phts.
B.Scientists have dne lts f things with the help f spaceships.
Scientists have dne a lt f things with the help f the________in the universe.They have even________spaceships t the________Mars t take________.They have even sent spaceships t travel utside the________.Nw n spaceships has travelled far enugh t reach ther________ in ur Galaxy.But it will be pssible ne day.
Read Paragraph 4 and cmplete the passage with the right frm f the wrds in the bx.
send,slar system,spaceship,star,pht,planet
Paragraph 1:
reading fr main ideas
Paragraph 2:
Paragraph 3:
Paragraph4:
Paragraph5:
the universe
Scientists haven't fund life n any ther planets.
It tells us smething abut the slar system and the Galaxy.
Scientists have discvered many ther galaxies.
Scientists have dne lts f things with the help f spaceships.
Scientists still have sme questins abut the universe.
Tip1:Pay attentin t the key wrds.
Tip2:Pay attentin t the first r the last sentence.
1. Use the reading skills we have learned tday t fininsh the reading exercise n Page2.(应用本节课所学到的阅读策略完成阅读理解。)2.Read the passage f Unit2 after the tape.(听磁带并朗读课文)
Thanks fr listening!
the Milky Way
Match the main ideas with the paragraphs.(将各段和主要内容相连线)
D.There is the slar system and the Galaxy in the universe.
E.Scientists have discvered many ther galaxies.
C.Scientists have dne lts f things with the spaceships.
A. Scientists still have sme questins abut the universe
Fill in the blanks.(根据句意或中文补全句子)
1.The earth is a________and it ges arund the________.
2.The sun and its planets are called________.
4.Scientists have discvered many ther ________(星系) in the________（宇宙）.
3.Our slar system is nly a small part f the________.（银河系）
6.It is ________t imagine hw large the universe is.
5.It's a gd chance t____________(交流)with the scientist abut the universe.