人教版高中英语必修3 Unit 4 Astronomy reading课件 (25张PPT)

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名称 人教版高中英语必修3 Unit 4 Astronomy reading课件 (25张PPT)
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科目 英语
更新时间 2020-03-20 08:54:23

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(共25张PPT)
Unit 4
How Life Began on the Earth

is
the scientific study of _____ or _____ in space
stars
planets
Astronomy



solar system
How many planets are there in solar system?
水星
金星
地球
火星
木星
土星
天王星
海王星
Skimming
Match the key words with each paragraph
Para 1
Para 2
Para 3
Para 4
Para 5

The universe
The earth
Water
Plants and animals
Human
In Ancient Chinese legend
It is _____that separated the sky from the earth.
Pangu
It is ______that made human beings.
Nuwa
It is _________that created the world and all the living things.
In western countries
God
What is "Big Bang"?
The universe began with a "__________" that threw ______ in all __________. After that, ______ began to form and combine to create _____ and other bodies.
Big Bang
matter
atoms
stars
directions
the Universe → the Earth
a cloud of dust
a solid globe
the formation of water
the formation of atmosphere
A cloud of dust
A solid globe
Atmosphere
water
4
1
3
2

settle into

explode

cool down
Repetition: How did the earth form?
Where there is water, there is life.

Water is the_______ of life.
cradle
Let's enjoy a poem about WATER and try to fill in the missing blank!
For millions of years, it exists;
Like the most devoted ________ ,
it raises lots of living things;
Like the most successful educator,
it takes away the worst,
but leaves behind ________;
WATER
mother
the best
How do you understand the poem?
Find supporting material in Para 3.
How do you understand the poem?
Because water is ____________to the development of life.
Like the most devoted mother,
it raises lots of living things;

fundamental
How do you understand the poem?
Because the continued presence of water allowed the earth to _________ harmful gases and acids into the oceans and seas.
Like the most successful educator,
it takes away the worst,
but leaves behind the best;
dissolve
With the appearance of Water,
Life began to come into existence.
1. Which of them came first on the earth?

2. Why?


3. Please list all the names of animals
below and put them in time order.

Para4 Plants and animals
Because plants produce ______ for animals.
oxygen
Plants.
shellfish
insect
reptile
mammal
amphibian
huge reptile
What kinds of animals are they?
1
2
2
3
4
5
low

Evolution(进化)
advanced(先进的)
simple
complex (复杂的)


What does the "they" refer to in paragraph 5?
------Human beings
Critical Thinking
It is said in this paragraph:
"Thus they have, in their turn, become the most important animals on the planet."
Does the author totally agree with the idea?

What is the author’s opinion about Humans?
BUT they are not looking after the earth
very well.
They are putting too much carbon
dioxide into the atmosphere, which prevents
heat from escaping from the earth.

Can you give more examples that we humans are not looking after the earth well?
Speaking
What can we do
to make the earth a better place?

To make the earth a better place, we need to take action right now.
First of all,…
Besides,…
What’s more,...

Only if we take action right now,
can we make the earth a better place.
Remember: what you do matters a lot!