资料简介
How life began on the earth
Unit 4
Warming up
In Chinese culture…
____________ separates the sky
from the earth.
Pangu 盘古
sky
earth
Three different ideas
_______ made human.Nvwa
Bible 圣经
_________ created the world in 7 days.God
Read the passage quickly and
analysis its structure.write down
the main idea of each paragraph.
Fast reading
Paragraph 1:
M
a
i
n
b
o
d
y
Paragraph 2:
Paragraph 3:
Paragraph 4:
Paragraph 5:
The formation of the earth
The importance of water
The development of plants
and animals on the earth
The arrival of humans and
their impact on the earth
Put the order of development of life into
a timeline. Use the reading passage to
help you.
1 Insects and amphibians appeared.
2 Dinosaurs appeared.
3 The earth became a solid ball.
4 Small plants grew on the water.
5 Reptiles appeared.
6 Plants began to grow on dry land.
Answer: 10 7 3 8 4 9 6 1 5 2 12 11
What is the widely accepted theory
about how life began?
The universe began with a “Big
Bang” that threw matter in all
directions.
Careful reading:
Bing Bang atoms
Stars and
other bodies
fo
rm
• At first, after the “Big Bang”, the
earth was a _________________;
then between 4.5 and 3.8 million
years ago, its shape became
________________. Next, the earth
began to ________ violently. At last,
the ____________ began to form
and _________ began to _______.
cloud of dust
a solid globe
explode
atmosphere
water appear
Paragraph 3
• Which of the following is true?
A There is also water on Mars today.
B At first the importance of water was
very obvious
C Water is based on the development
of life
D The water in the oceans and seas
can break down harmful things
Paragraph 4
1. Reptiles were animals live on land as well
as in the water.
2. Fish appeared before small water plants.
3. Both dinosaurs and reptiles feed young on
milk.
4. The reason for the disappearance of
dinosaurs is unknown to us.
5. Mammals became more and more after
dinosaurs appears.
Paragraph 5
1.What does “some small, clever
animals” mean?
2.What problem is caused by them?
3.Will life will continue developing
on the earth for millions of years
to come?
[ _________ ]
summary: the formation of the earth
how life begin on the earth
Big Bang stars
[ ___________ ]
explode with
fire and rock
atmosphere
a solid globe
a cloud of dust
produce: carbon
dioxide,nitrogen,
water vapour....
water
small plants in water shellfish and fish
plants grown on land
insects and amphibians
mammals
reptiles
dinosaurs
Man had evolved from apes（猿猴）.
We are
making
the
world
better.
We are
making
the
world
worse.
It prevents heat from escaping from the
earth into space.
The earth is
becoming
hotter and
hotter!
solar energy
plant trees
recycle rubbish prevent polution
save water
purify air
Whether life will continue on the
earth depends on human beings.
Thank you
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