人教高中英语必修3Unit 4 Astronomy: the science of the stars reading（共22张PPT）

(共22张PPT)


Ⅰ.Fill in the blanks with the correct words.

The a__________ of the earth is filled with carbon dioxide, nitrogen and other gases.
It’s important for everyone to apply t ______ to practice.
U_______my brother, I’m good at swimming ,while he is good at football.
As we all know, smoking is h ______to people.
We can’t e_______(生存) without water.

Have a revision.
tmosphere
heory
nlike
armful
xist
1.Will we be ________(及时) for the six o’clock train?
2. Thousands of turtles drag themselves onto the beach and _________(下蛋) in the sand.
3. Mary ____________________(生了一对双胞胎) last night.
4.She had not been friendly to Pete and he,___________(轮到他) , was cold to her when she came to stay.
5.Further treatment will ____________________________
(抑制癌症cancer发展)


Ⅱ.Translate the phrases and complete the sentences.
in time
lay eggs
gave birth to twins
in his turn
prevent/stop cancer from developing
Pangu separates the sky from the earth
Nvwa made humans
Self-study
Read the passage as quickly as you can and finish Task 1
Task 1
1.What’s the accepted theory mentioned in the text?
It is the Big Bang that was mentioned in the text.
2. How did water come into being on the earth?
As the earth cooled down after the earth exploded, water came into being.
3. Why did water make it possible for the life to develop.
It allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction .
4. What made possible the rise of mammals on the earth?
The disappearance of dinosaurs made the possible the rise of mammals on the earth.

Work in pairs
Read the passage closely and finish Task 2 and 3
Para. 1 A.The formation (形成) of the earth.


Para. 2 B.The importance of water for life.

Para. 3 C.A widely accepted theory about
the formation of the universe.


Para. 4 D.The arrival of humans and
their impact on the earth.

Para. 5 E.The development of plants
and animals on the earth.
Task 2

Divide the passage into two parts


Stage 1 : The development of the earth
para._______

Stage 2 : The development of life
para.________

1—3
4—5
Task 3

Detailed reading



Read the first part (para.1-3) loudly and finish the following tasks
Ⅰ. True (T) or False (F).
1. The earth appeared before the Big Bang happened.
2. The original atmosphere consisted of nitrogen and oxygen.
3. The main difference between the earth and other planets is that there is water on the earth.
4 The harmful gases and acids came from the oceans.
.
F
F
T
F
Ⅱ. Read paragraph 1to 3 again and fill in the chart below
According to a widely accepted theory
that the universe began with a(n) ________
After the Big Bang the earth was still just a _____________, which
settled into a _____________later and formed the earth.
It exploded to produce ________ ___________ __________________
and other gases, which formed the earth’s__________
Big Bang
cloud of dust
solid globe
carbon dioxide,netrogen,water vapour
atmosphere
As the earth cooled down, ________appeared on its surface.
The continued presence of _______dissolve the harmful
things into the oceans, helping _______ to develop.
water
water
life
Discuss with your group members to write a report about how the earth developed with the help of the following words.
Work in groups
according to … the universe …after that,…..
a cloud of dust... ,which… a solid globe….
it exploded to produce…,which…atmosphere
as the earth cooled down …water…
the presence of water … harmful …oceans…
for life to develop
Homework
Read the paragraph 1to 3 correctly and fluently, and then preview the rest .