人教版必修3 Unit4 Unit 4 Astronomy: the science of the stars Revision课件（共19张PPT）

(共19张PPT)
Unit 4 Astronomy
(Revision)
by Chang Yue

Unit 4 Astronomy


Revision

a cloud of _____

Big Bang
a solid _______

slowly combine


the earth ______ down
it exploded loudly with _____ and _____




the earth’s ___________
dust
globe
fire rock
atmosphere
cooled
How did the earth come into being?
课文内容再现

The development of life









small plants appear in water

Shellfish and all sorts of fish

green plants began to grow on land

land animals:
insects&hibians
forests

reptiles appeared
dinosaur
the rise of mammals
small clever animals with hands and feet

Key Words
1. __________ n. 气候
2. __________ n. 生物学家---_________n.生物学
3. __________ n. 万有引力；重力
4. __________ n. 链子；连锁；锁链
5. __________ n. 卫星；人造卫星
6._________ adj.猛烈的，暴力的---_________ n.暴力
7._________adj.有害的---__________(反义词）--- ________ n.&v. 危害，伤害
8._______vi. 存在----__________n.生存，存在
satellite
climate
biologist
gravity
chain

biology
violent
violence
exist
existence
harmful
harmless
harm
9. _________ n. 球体；地球仪；地球---_______adj.全球性的；全世界的
10. ______________ n. 大气层；气氛
11. __________ v. 乘；增加
12. ________ v. 碰撞；坠落
13. _______ vt.& n. 拉(力)；拖；牵---_________(反义词）
14._________adj.温和的，文雅的---___________adv.
15.________vt&vi. (使）迷惑；n.谜，难题---_________adj. 令人迷惑的---___________adj.感到迷惑不解的
globe
atmosphere
multiply
crash

global
gentle
gently
puzzle
puzzling
puzzled
pull
push
Practice
Playing computer games for a long time will not only do_________ to your physical health , but it is also
__________ to your mental health . So it is __________to give it up. (harm)
2. Their untrue comments __________ (violence) hurt
the feeling of Chinese people.
3. Not all people are aware of the various effects of
__________(globe) warming on Earth.
4. Some believe in the __________(exist) of life on Mars.
5. _________(like) most people in the office who come to work by car , I usually come to work on foot.


harm
harmful
harmless
violently
global
existence
Unlike
6. His answer to the question sounds _________ (puzzle) and we are all _________ (puzzle) a lot.
7. There were many fish___________(float) in the river because of the serious pollution.
8. People hope that measures will be taken to
prevent house prices___________(rise).
9. She is a ________girl and she often talks to
others__________(gentle).
10. The little boy______(lie) to his mother that
the cock _______(lay) an egg.


puzzling
puzzled
floating
rising
gentle
gently
lied
laid
1. ____________下蛋
2. ____________挡住(光钱)
3. ____________感到高兴; 感到振奋
4. ____________突发; 爆发
________________密切注视; 当心
__________________熟悉，掌握，理解

短语翻译
break out
lay eggs
block out
cheer up

watch out (for)
get the hang of
6. ________________阻止; 制止

7. ______________产生; 分娩

8. ______________及时

9. _______________轮到某人；接着

10. ______________既然

11. ______________依靠

12. ______________结果


in time
prevent ...from
give birth to

in one’s turn
now that
depend on
as a result
Fill in the blanks with the following phrases:
get the hang of , break out, watch out for,
depend on, in time, in one’s turn, now that
1.Last night, Mrs. Green had a heart attack.
But luckily, the doctor came _________to
save her life.
2. I was warned to _________________the
terrifying dog.
3. Last night a fire ___________ in the hotel.
in time
watch out for
broke out
4. Only by practising time and time again can you
___________________the grammar rules.
5. You can__________ it that he will lend you some
money to help you out.
6. Class Three should be responsible for raising the
national flag this week_________________.
7. ___________the parking regulations have become stricter, more people will use public transport.
get the hang of
depend on
in its turn
Now that
重点句型：
1. This produced a chain reaction, which made it possible for life to develop.
make + it + adj.+ (for sb.) + to do
类似用法的词还有：
find/ think/feel/consider +it + adj. +to do
互联网使我们了解国内外信息成为可能。
The Internet_______________________________ the
information both at home and abroad.
2. But when I tried to step forward, I found I was carried
twice as far as on the earth.

makes it possible for us to learn
总结与拓展：
倍数+ as + adj.(原级）+as…
倍数+ the +名词( size/ width/height/depth…) + of
倍数+adj./adv.(比较级）+ than…
据报道，最近发现了一颗行星，它几乎是地球的三倍大。
It is reported that a new planet has been discovered
recently. It is almost__________________________
the earth.



three times as large as
活学活用：运用本单元所学句型完成句子。
1.人们采取了措施来阻止环境恶化。
People took measures _________________________
_________________________. ( prevent…from…)
2. 这根绳子是那根绳子的三倍长。
This rope is __________________________ that one.
=This rope is__________________________________
that one.
= This rope is ______________________________
that one.
to prevent the environment
from getting worse
three times as long as
three times the length of
three times longer than

3.疫苗的研发使得彻底战胜冠状病毒成为可能。
The development of vaccine makes__________
____________________the novel coronavirus.
4. 新学期什么时候开始仍然还没决定。
It hasn’t been decided yet__________________
____________.
5. 问题是国外是否能控制住这次疫情(epidemic)。
The problem is___________________________
______________ in foreign countries.
it possible
to completely defeat
when the new term
will start
whether this epidemic can
be controlled
语法填空：
Last Sunday, a big fire _______(break) out in a building near my home and soon the stairs were
full of smoke, which made_____ impossible for
people to escape. A woman ________(trap) on the 10th floor was in a panic and a man ______ was
too old to walk was turning to people for help.
_________(luck), the firemen arrived_____ time and tried their best to save the people in danger.

broke
it
trapped
who
Luckily
in
__________(depend) on their professional
knowledge, the firemen quickly prevented
the fire _______ (spread),but it was obvious
_____they had no way to save all the people.
From the story, we can learn a lesson:
__________we can stop fire disasters
depends on whether we have a sense of
________(safe).

Depending
that
Whether
safety
spreading
Thank You !

Thank You
Thank You