Is it reasonable and scientific(科学
的）?
1.Practice students’ skimming and scanning skills.
2.To protect the environment
3.Learn some useful expressions
Skimming for the main idea.
What’s the main idea of this text?( )
A. A brief introduction on how human beings were born.
B. A brief introduction on the formation of the earth and the
development of life on it.
C. The “Big Bang” had a great effect on the birth of the earth.
D. The appearance of human beings was a disaster to the earth.
B
Read the passage and match the main idea
of each paragraph.
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 influences on the earth.
Para. 5 E The development of plants
and animals on the earth.
Let’s read the passage paragraph by paragraph.
Which theory is widely accepted about
how the earth began?
A widely accepted theory about the formation of the universe.
(1) After the Big Bang, what was the earth like?
a cloud of dust a solid globe
The formation of the earth.
exploded with fire
and rock
produced water
vapour and gases
(2) When the earth became so violent,
what happened next?
(1)What is it that makes it possible for life to develop? ( )
A. the fire and rock
B. the harmful gases
C. the acids
D. the continued presence of water
D
The importance of water for life.
Because the continued presence of water
allowed the earth to dissolve harmful gases and
acids into the oceans and seas.
Read the paragraph four and put the following statements
into right order
_______Insects and amphibians appeared.
_______Dinosaurs appeared.
_______Reptiles appeared.
_______Green plants began to grow on dry land.
_______Shellfish and other fish appeared.
_______Extremely small plants grew on the water.
_______Mammals appeared.
1
2
3
4
5
6
7
The development of plants and animals on the earth
1.Who are the small clever animals with
hands and feet?
human beings
2. Are they taking care of the earth well?
Why?
The arrival of humans and their influences on the earth
Because they are putting too much carbon dioxide into the
atmosphere, which prevents heat from escaping from the
earth into space.
The earth may become too hot to live on .
Big
Bang
A cloud of
____ dust
A solid
___globe
The earth’s
_______ atmosphere
____:
fundamental
to the
development
of life
water
Small _____
on the surface
of water
Plants
Early _____
and all sorts of
fish
shellfish Green
____ on
land
plants
Land animals
reptiles
dinosaurs
mammals_____
Human
beings
No one knows exactly how the earth began. However, according to a widely
accepted theory, it began 1.____a “Big Bang”. Then the earth exploded loudly and
produced water vapour and many gases, 2._____(make) the earth’s atmosphere.
And then as the earth cooled down, water appeared and stayed 3.____the surface.
It was the presence of water 4.____allowed the earth to dissolve harmful gases and
acids into the oceans and seas, 5.____made it possible for life to develop. And the
6._______(appear) of small plants encouraged the 7.________(develop) of early
shellfish and all sorts of fish. Next, green plants began to grow on the land. They
were followed by land animals. Later, reptiles appeared for the first time, after
which dinosaurs developed. However, they suddenly 8._______(appear). Therefore,
mammals rose on the earth. Finally, humans appeared and spread all over the
earth. However, they are putting too much carbon dioxide into the atmosphere,
making the earth too hot to live on. So 9.______life will continue on the earth will
depended on whether this problem can 10.________(solve)
with
making
on
that
which
appearance development
disappeared
whether
be solved
make full use
of solar energy
plant trees recycle rubbish
save water purify air
What can we do to take care of the earth?
Discussion:
Use public
transportation
put your ideas into complete sentences:
More attention should be paid to the serious environment problems.
When we go out, we would better use public transportation.
We can also call on more people to take their own responsibilities by
putting up pictures and slogans.
The government can enact a law to protect the environment, which would
be more effective.
Scientists should explore more new energy to replace the coal.
…
As high school students, we should take immediate measures to
protect the environment. For example, save water in our daily life;
plant more trees.
红河州第一中学为积极响应保护环境的号召，丰
富校园文化，计划在学校张贴一些海报号召同学
们爱护环境，请大家以小组为单位设计几条宣传
标语。（the language should be brief,
appealing and use imperative sentences）
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