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）

(共17张PPT)
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
Anyone out there
Expressions
Anyone out there
Scientists think that there ____________ on the earth for ____________________ years. However , we have not found life on any other planets yet.
The earth is a planet and it __________ the sun. Seven other planets also go around the sun. ____________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 ____________________ stars and planets, called the Galaxy or ______________. There are billions of stars in the Galaxy, and our sun is only one of them.
has been life
hundreds of millions of
goes around
None of
a much larger group of
Milky Way
Check your memory
Scientists have also discovered many other galaxies in the universe. They are very __________ and their light has to travel for many years to us. So how large is the universe _________________.
Scientists have sent spaceships to the planet Mars to __________. They have even sent spaceships to travel outside_____________. However, no spaceship has travelled____________ in our Galaxy.
Scientists have always asked the questions: with so many stars in the universe, ___________, or is there life out there in space Have there been visitors to the earth from other planets Why has no one _________________ We do not know the answer…yet.
far away
It’s impossible to imagine
take photos
the solar system
far enough to reach other stars
are we alone
communicated with us
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.