人教高中英语必修3Unit4 Astronomy: the science of the stars reading (共20张PPT)

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名称 人教高中英语必修3Unit4 Astronomy: the science of the stars reading (共20张PPT)
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科目 英语
更新时间 2020-02-27 21:00:34

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(共20张PPT)
Unit 4
Astronomy:
the science of the stars

Twinkle, twinkle, little star,

How I wonder what you are.

Up above the world so high,

Like a diamond in the sky.

Twinkle, twinkle, little star,

How I wonder what you are.


Mercury 水星
Venus 金星
Earth 地球
Mars 火星
Jupiter木星
Saturn 土星
Uranus 天王星
Neptune 海王星

universe
Which planet are you living now?

How did life begin on the earth?
How life began on the earth

Reading
Task1 Skimming
Read the text quickly and choose the main idea of each paragraph (七选五)(4mins)
A. How life began on the earth
B. The formation of the earth.
C. The arrival of the humans and their influence on the earth.
D. The development of plants and animals on the earth.
E. A widely accepted theory about the formation of the
universe.
F. The disappearance of the dinosaurs.
G. The importance of water for life.

Para 1
Para 2
Para 3
Para 4
Para 5




Let’s get to know
how life began on the earth
Careful-reading
For several billion years after the “Big Bang”

A ( )
Between 4.5 and 3.8 billion years ago

A ( ) globe

( ) with fire and rock
Produce????(______________________ )
(C, N2, H2O, and other gases)
made


atmosphere
cool down and______ appeared
Life began on the earth
cloud of dust
solid
Exploded
water
Task 2. Read paragraph 1-3 ,
and find out the formation of life
on the earth
Task 3. Read paragraph 4 and 5 quickly,and find out how life develop?
small plants on the______
early ______
plants grow on ______
______ appeared on land
amphibians(两栖动物)
plants grow into ______
reptiles
dinosaurs
manmals






water
shellfish
land
insects
forests
lay eggs
give birth to young baby animals
Life develop on the earth
What is writing style of the passage?
A. an essay(散文) B. an exposition(说明文)
C. a narrative(记叙文) D. a novel(小说)
Thinking
The passage develops in the order(顺序) of _______

time
In the last paragraph, what is the writer's attitude towards the future of the earth?
A. positive (积极的) B. negative(消极的)
C. neutral(中立的) D. indifferent(漠不关心)
Thinking
Post-reading

At first, the earth was 1.___ cloud of dust ,which later settled into a solid globe. Then, water appeared on the earth. Many millions years 2.___(late) , small plants grew on water. They 3. ___(multiply) and filled the seas with Oxygen, 4.___encouraged the 5.___(develop) of early shellfish. Next, green plants grew on land. When they grew into 6.___(forest), reptiles appeared for the first time. They 7.___(general) produced young by 8.___(lay) eggs. After dinosaurs disappeared, manmals came. At last, humans appeared and spread all over the world. 9.___ they are putting too much Carbon Dioxide into the air. Whether life will continue depend on whether it can 10.___(solve).
How life began (3 mins)
Post-reading

At first, the earth was 1.___ cloud of dust ,which later settled into a solid globe. Then, water appeared on the earth. Many millions years 2., ___(late) , small plants grew on water. They 3.___ (multiply) and filled the seas with Oxygen,4. ___encouraged the 5. _ __(develop) of early shellfish. Next, green plants grew on land. When they grew into 6. ___(forest), reptiles appeared for the first time. They 7.___(general) produced young by 8.___(lay) eggs. After dinosaurs disappeared, manmals came. At last, humans appeared and spread all over the world. 9.___ they are putting too much Carbon Dioxide into the air. Whether life on the earth will continue depend on whether it can 10. ___(solve).
How life began
a
later
multiplied
which
development
forests
generally
laying
But
be solved
Why ?
Why ?
They are putting too much CO2 into the atmosphere


Earth is our home, beautiful and unique.
As a student, how to do little things to protect the earth?
low-carbon 低碳的
bycycle 自行车
trees 树
water 水
recycle rubbish 垃圾回收
solar energy 太阳能






Discussion

Whether life will continue on the earth depends on human beings.
One earth, one world!
We love, we care!
I swear
我宣誓:
The United Nations Climate Change Conference(联合国气候大会) will be held in London next month. As a student, you are going to write a letter to the conference. Do you have any good ideas about how to protect our earth?
Assignment
Homework
Thank you!!!