八年级下册 Module 3 Journey to space Unit 2 We have not found life on any other planets yet 课件（33张）

(共33张PPT)
none
environment
that
solar
system
solar system
pron. 没有一人；没有
一个；一点儿也没有
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；(尤指)太阳系
group
galaxy
universe
light
impossible
out
communicate
n. 群；组
n. 星系
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
前缀im- + possible
Unit 2 We have not found life on any other planets yet.
Module 3 Journey to space
A. galaxy
B. planet
C. solar system
D. star
E. universe
3. Match the words and expression with the pictures.
A
B
C
D
E
B
Free Talk
Have you ever read the novel The Three Body Problem Do you like it Why or why not
2. Is there any life on other planets
Para. 1
Para. 2
Para. 3
Para. 4
Para. 5
b) People have not found life on any other planets.
a) What is the solar system and the Galaxy
e) The universe is too large to imagine.
d) Scientists have sent spaceships to explore the Galaxy.
c) Questions from the scientists have no answer yet.
Read and Match
Tip: Pay attention to the key words.
Read and Answer （para.1-2）
How long has life been on the earth
Why do scientists think they can’t find life on seven other planets
Scientists think there has been life on the earth for hundreds of millions of years.
None of them has the environment of that of the earth.
fact or opinion
fact or opinion
Tip: 注意学会分辨“事实”和“观点”。
1. What does “them” refer to
2. What does “that” refer to
Tip: 注意代词them，that均指前文出现过的事物，且位置较近。
What environment does life on the earth need
2. Have scientists stopped finding life in space when they don’t think they will find
Life needs air, water, sunshine and so on.
No, they keep looking for.
Discuss: Is it a meaningful thing
作业本（去掉T1）
高效练 （去掉T6）
背诵课文 Para 2&3
Unit 2 We have not found life on any other planets yet. Period 2
Module 3 Journey to space
Read and Draw （para.2-3）
Can you draw a picture to show the relationship in the universe
你可以试着画出宇宙里的关系图吗？
Key words: the earth, seven other planets, the sun, the solar system, the Galaxy, the universe
the universe
the Galaxy 银河系
the solar system
太阳系
How large is the universe
Read and Answer （para.3）
Why is it impossible to imagine the size of the universe
The light of other galaxies has to travel for many years to reach the earth.
Light travel for a year
Light year (光年)
距离单位
9,460,730,472,581km
Read and Check（P21 T3）
planet
any
haven’t
haven’t
Read and underline（Para.4-5）
1. What have scientists done
2. Can we answer the questions right now
Let’s guess the title!
Anyone out there
Life on the earth
The sun and other stars
The stars at night
_______________________________
[Beginning]… However, we have not found life on any other planets yet.
[Body]…
[Ending]… Why has no one communicated with us We do not know the answer … yet.
Tip: Pay attention to the last sentence of the beginning and ending.
关注首末段最后一句话，抓住文章核心。
Discussion
Where can you read this passage
A. Newspaper B. Science magazine C. Story book
Do you want to communicate with the aliens Why or why not
3. Which one is a better ending, why
A. We do not know the answer.
B. We do not know the answer … 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. 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.
solar system
none
environment
4. Complete the passage with the words and expression in the box.
communicate
universe
communicate environment none solar system universe
Have a try
好几亿年
绕……转
……当中没有一个
几个其他行星
太阳系
银河系
在宇宙中
在太空中
拍照
与……交流
在地球上
hundreds of millions of years
go around
none of
several other planets
solar system
the Galaxy/ the Milky Way
in the universe
communicate with
take photos
in space
on the earth
作业本
高效练 （去掉T4）
背诵课文 Para 2&3
Module3 Unit 2
课本知识点整理
Scientists think that there has been life on the earth for hundreds of millions of years.
科学家们认为地球上的生命已经有上亿年的历史。
there be 的现在完成时“there have/has been+名词”
若加时间长短，需用介词 for 连接，如for one year
There has been a picture on the wall for a long time.
There have been some old trees in our school.
墙上有这一幅画已经很久了。
在我们学校已经有一些古树了。
Language points
① hundred前加基数词，hundred要用单数形式；一百：one hundred 五百：five hundred
② hundred与of连用表示“数百”时，hundred要用复数形式，即hundreds of。
例如：
There are eight hundred students in our school.
There are hundreds of people in the park.
thousand, million, billion和hundred的用法相同。
We planted _____ trees last year.
A. hundreds of B. hundred of
C. five hundreds D. five hundred of
Practise
With so many stars in the universe, are we alone, or is there life out there in space
宇宙中有这么多星球，我们是孤独的吗？抑或太空中还有其他生命存在呢？
这里with so many stars in the universe是介词短语，在句中作状语。类似的例子还有：
那个男孩站在那里，手插在口袋里。
The boy stood there with his hands in the pockets.
With so many things to do, we have no time to play.
要做的事情这么多，我们都没时间玩了。
________ the computer and the Internet, we can get the information we need at a great speed.
A. By B. Have C. With D. Use
by+doing sth./
by+交通工具
Practise
— Why do you always sleep ______
— Because I’m afraid of the dark.
A. by yourself B. with the door open
C. with the window open D. with the light on
alone: 独自，单独一人（没有感彩)
lonely :孤单的，孤独的（指情感上的孤独）
她独自一人回家
She went home alone.
有时，我会感到孤独。
Sometimes, I feel lonely.
He lives ___, but he never feels_____.
A. lonely; alone B. lonely; lonely
C. alone; lonely D. alone; alone
Practise
3. Why has no one communicated with us
为什么没有人和我们联系呢？
今天没有人来学校。
No one comes to school today.
no one = nobody 表示“没有人”，只能指人，作主语时，谓语动词为单数形式。如：
no one 只能指人，可用于回答 Who开头的特殊疑问句
none 可以指人也可指物，常回答 How many/how much开头的特殊疑问句
1. How many animals can you see in the picture
A. No one. B. Nobody C. None
2. Who’s in the classroom
A. No one. B. Nobody C. None
3. How many students in the classroom
A. No one. B. Nobody C. None
4. Have you bought any clothes
A. No one. B. Nobody C. None
— I’m hungry. Is there any bread in the fridge
— _____, but we have cakes. Would you like to have one
A. Some B. Much C. None D. Nothing
Practise
none 指三个或三个以上的人或物中“没有一个”，其后常接“of + 名词 / 代词”，后面动词单复数形式均可。
None of us has / have been to Sanya.
我们都没去过三亚。
How many of you have read this book
A. Nobody B. Someone
C. None D. Anybody