Module 3 Journey to space Unit 2 We have not found life on any other planets yet. 课件（外研版八年级下册）

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Module 3 Journey to space
Unit 2 We have not found life on any other planets yet.
In the previous lesson, we have heard the latest news about a space travel from the earth to Mars.
Scientists have sent __________________ and it ___________there after a journey of several months. Scientists__________________________ yet. And no astronaut ______________Mars because ________________. So scientists are working hard in order to ______________________________.
If you would like to get more information on space travel, you can ______________________________.
a spaceship to Mars
has arrived
haven't discovered life on Mars
it is very far away
send astronauts to Mars one day
has ever been to
go online to search for information
Summary of unit 1
Discussion
Why are lots of scientists trying hard to send astronauts to Mars
To see if humans can live on Mars
To see if there are some useful resources on Mars
To know more about the universe and ourselves
To develop science and technology
Shenzhou is __________.
It was unmanned at first.
ShenzhouV was a manned spaceship.
Chang’e is __________.
Tiangong is __________.
Tianwen is __________.
the spaceship
the lunar probe
the Mars probe.
the space station
China’s development in space exploration
Read and choose
Read quickly and choose the best title.
A. Anyone out there B. Life on the earth
C. The sun and other stars D. The stars at night
on other planets
Read and check
The earth is a star.
The sun is a star.
There is more than one galaxy in the universe.
The light from the 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.
Ⅹ
√
√
√
Ⅹ
Ⅹ
Read and complete
____1____
___2___
other ___3___
the Galaxy
star
the universe
planet
galaxy
the solar system
other___4___ and ___5___
the sun
(It’s a/an ___6___)
the earth and 7 other ___7____
the universe
the Galaxy
(the Milky Way)
galaxies
stars and planets
star
planets
How large is the universe
There’re billions of stars in it.
It’s impossible to imagine.
[ ju n v s]
[ ɡ l ksi]
the moon
(satellite)
man-made
satellites
Read and complete
What have scientists done in the universe
1.
2.
3.
What haven’t scientists done in the universe
1.
2.
They have discovered many other galaxies in the universe.
They have sent spaceships to take photos on Mars.
They have even sent spaceships to travel outside the solar system.
They haven’t found life on any other planets yet.
They haven’t sent spaceships to other stars.
Why isn’t there life
“None of them has an environment like that of the earth.”
other planets
the environment
Find out and think about the questions
What does the writer think of the questions
Think and discuss
1. Why do scientists keep asking these questions
2. What may be the writing purpose of this passage
There are still many unknown things about the universe, and scientists want to explore it.
To arrouse our interest in space exploration.
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
communicate environment none solar system universe
communicate
universe
Read and complete
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
一群
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
Have a try
a group of
Look at the cartoon picture and answer the questions.
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)
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
UFO
alien
It is reported that some people have seen the UFO on the earth.
Some people even say that they have met aliens.
Do you believe it Why or why not
More facts about the space
Space is enormous. The universe we know and can talk about is a million million million million (that’s 1,000,000,000,000,000,000,000,000) miles across. But according to most scientists, the universe is far bigger than this. Nobody knows how many stars there are in the Milky Way (galaxy) - probably from 100 billion to 400 billion - and the Milky Way is just one of a 140 billion other galaxies, many of them even larger than ours.
It should be mentioned* that any possible life on other planets is at least two hundred light years* away from us. It means even if there are some aliens* who know we are on the Earth and are able to see us from their planet. They are watching light that left Earth two hundred years ago. So they’re not seeing you and me. They are watching the people in the 19th century.
Anyone out there
Expressions
Is there life on other _______ (行星)
It took them 3 hours ________ (到达) the airport.
3. Television always tells us the ___________ (最新的新闻).
4. We worked together in some school _________(项目) and luckily won lots of prizes.
5. Shenzhou-13 spaceship has already sent several __________ (宇航员) into space.
6. Sound travels more slowly than ______ (光).
7. Children need a home ___________ (环境) with love, so parents should often try _____________ (交流) with them.
8. There are billions of _____ (星系) in the ________ (宇宙).
9. It is almost __________ (不可能的) to predict our future.
10. _____ (没有一人) of us knew how to solve the problem.
planets
to reach
projects
latest news
astronauts
light
environment
to communicate
galaxies
universe
impossible
None
Dictation
很多科学家们正努力工作为了某一天能把宇航员送到火星上去。
为什么没有人与我们交流过？
宇宙中有这么多恒星，我们是孤单的吗？
4. 它们中没有一个拥有着和地球一样的环境。
With so many stars in the universe, are we alone
Lots of scientists are working hard in order to send astronauts to Mars one day.
Why has no one communicated with us
None of them has an environment like that of the earth.