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

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课文配套ppt课件，共20页。PPT课件主要包含了Go ，universe，galaxies，Avatar，UFO，Aliens，ˈævətɑː，That’s why，stars，planet等内容，欢迎下载使用。
Befre the jurney, let’s review sme knwledge abut space.
Are yu ready?
D yu knw them?
The earth is a planet and it ___________ the sun.
The sun and its planets are called ________________ .
the slar system
Our slar system is a small part f ________________________.
the Galaxy / the Milky Way
There are many ________in the universe.
Have scientists discvered life n Mars？Have scientists discvered life n ther planets?We haven’t fund life n any ther planets.Unit 2
Are we alne?
1. Anyne ut there?2. Life n the Earth3. The sun and ther stars4. The stars at night
Task 1:Read the passage and chse the best title fr it.
Tips: key sentences in each paragragh，especially para 1 and para 5
An article n whether there is life n ther planets
An article n hw life develped n the earth and what it is like
An article n ……
Accrding t the main idea f each paragraph, please put the fllwing pictures in the right rder.
Fast reading
Life n earth and ther planets
Planets, slar system and the Galaxy
Other galaxies in the universe
Spaceships t Mars and utside the slar syatem
Careful reading: Para1
1.Hw many years has there been life n the earth?
……fr hundreds f millins f years.
A. 百万年B. 千万年C. 亿万年
2. Hwever, we have nt fund life n any ther planets yet.
(Read Para2 and answer)
Because nne f them has an envirnment like that f the earth.
S_________________________________ _______________________________.
scientists d nt think (they will find life n the ther planets)
What des “that”refer t？
The earth is a ______ .
Eight planets ges arund the _____.
The sun and its eight planets are called ________________ .
Our galaxy is called__________________ . There are billins f ______in the Galaxy.
the Galaxy r the Milky Way
Para.2 & first sentence in Para.3
Our sun is nly ne f the stars.
planets ( g arund)
the Milky Way
planet ( g arund)
The stars lk small.
They are far away.
Their light has t travel fr many years t reach us.
Careful reading: Para3
S hw large is the universe?
It is impssible t imagine.
Scientists have sent spaceships t ______
utside the slar system
Hw great the scientists are!
Careful reading: Para4
What have scientists dne t learn abut the universe?
N spaceship has travelled far enugh t reach therstars in ur Galaxy.
enugh adj. adv.
with s many stars in the universe
Is there life ut there in space?
Have there been visitrs t the earth frm ther planets?
Why has n ne cmmunicated with us?
They（aliens） are afraid f us.
The cmmunicatin tls are nt gd.………
The languages are different frm urs.
Careful reading: Para5
Wrk hard and get the answers.
Anyne ut there
Spaceships t Mars and utside the slar system
Planets, slar system and the Galaxy
Scientist think that… Hwever, have nt fund
The earth is…Seven ther planets… But nne f them… Slar system … Galaxy…
discvered…They are far…and lights…reach us impssible…
sent …t…t take… They have als sent… Hwever …
Questins:
Lk at the picture and answer questins.