人教版必修3 Unit4 Astronimy the science of the stars Reading 课件（42张PPT）

(共42张PPT)
Unit 4 Astronomy
the science of the stars

The Solar system
eight planets
海王星
Neptune
水星
Mercury
金星
Venus
地球
Earth
火星
Mars
木星
Jupiter
土星
Saturn
天王星
Uranus








Pluto
Scientists think Pluto is
too small to be called a planet.
别了，老弟!
2006

How Life Began on the Earth


In Chinese culture…
____________ separated(分开）the sky
from the earth.
Pangu 盘古
sky
earth


_____________ made human beings.





Nuwa (女娲)
In western countries:
　　　　　　　______________ created
the world and all living things.
God (上帝)

In fact,…
The video is about the development of life on the earth.
If you want to know more details, please turn to Page 25.


What is the sequence(顺序) of description of the passage?
A. Time sequence
B. Space sequence
C. Logical sequence
Fast reading
What’s the writing style of the text?
A. Explanation 说明文
B. Narrative 记叙文
C. Essay 散文
D. Novel 小说
Fast reading
Look at title and the pictures (Page 25. page26). Can you get some information about what we will learn from the text ?
Picture 1: Big bang earth water
Picture 2: The evolution(development) of life on the earth
The text may tell us the ___________ of the earth and the ___________ of life on it.

development
Title: How life began on the earth

formation
Fast reading
Para.1

Para.2

Para.3

Para.4

Para.5
A theory about how the universe was formed
The formation(形成) of the earth
The importance of water for life
The development of plants and animals
The arrival of humans and their effects on
the earth






Match the main idea for each paragraph.

Part 1: The development of the earth

Part 2: The development of life
Fast reading
1. Why was life able to develop on the
earth but not on other planets?
A. The earth had a solid shape.
B. The earth did not have harmful
gases in its atmosphere.
C. The water stayed on the earth
but not on other planets.
D. The earth was not too hot and
not too cold.
C

Choose the best answer.
Careful reading
2. Why was it necessary for plants to
grow before animals?
A. Animals needed plants to protect
them from the sun.
B. Plants provided oxygen for
animals to breathe.
C. Animals could hide from hunters
in the forest.
D. It was easier for plants to grow.
B
3. How long did dinosaurs exist on the
earth___.
A. More than 140 billion years
B. More than 140 million years
C. More than 140 years
D. More than 140 thousand years

B
Task one (para. 1)
What is the widely accepted theory?
The began with a "Big Bang" .
universe
Part 1: The development of the earth
Careful reading
a cloud of _____

Big Bang
a solid _______

slowly combine


the earth _____ down
it exploded loudly with _____ and _____


____ appeared



the earth’s ___________
dust
globe
fire rock
atmosphere
cooled
How did the earth come into being?
Task two (para. 2)
water
Why is water so important for the beginning of life?
Because water the earth to dissolve gases into the oceans
and seas.

allowed
harmful
Task three (para. 3)
Part 2: The development of life

1.What life developed after water appeared?
2.What life developed in water next?
3.What about the life on land?
4.What life developed next on land?
5.What life developed after forests appeared?
6.What life developed after dinosaurs?
7.What life developed after mammals?
Task Four (para. 4&5)
appeared in water
1.What life developed after water appeared?




small plants
and all sorts of .


2.What life developed in water next?
shellfish
fish
began to grow on land
appeared

3.What about the life on land?
green plants
insects
on land as well as in the water
plants grew into .
4. What life developed next on land?
amphibians
forests
appeared
developed


5.What life developed after forests
appeared?
reptiles
dinosaurs
on land

6.What life developed after dinosaurs?
mammals
How did they produce the young?





small animals
7. What life developed after mammals?
clever
arrival of small
plants in water
early shellfish





plants
animals

summary
all sorts of fish


early shellfish

many kinds
A few kinds


Plants in the water
Plants on land

water
land

insects
dinosaurs

simple
complex(复杂的)

low

advanced（高级的）

clever animals
human beings


1. Insects and amphibians appeared.
3. The earth became a solid globe.
5. Reptiles appeared.
7. The earth was a cloud of dust.
9. Shellfish and other fish appeared.
11. Clever animals with hands and feet appeared.
2. Dinosaurs appeared.

4.Small plants grew on the water.
6. Plants began to grow on dry land.
8. Water appeared on the earth.
10. The universe began with a “Big Bang”.
12. Mammals appeared.
8
3
10
9
11
5
1
7
4
12
6
2
Now, What’s the correct order?

summary



From the last paragraph we can infer that the author is ____.
A. confident
B. sad
C. concerned
D. angry
Discussion
Greenhouse effect
But they are not taking care of the earth very well.
What problem are humans causing?


make the earth too hot to live on
put too much carbon dioxide into the atmosphere
greenhouse effect
global warming


The Earth Day is coming. What can we do to protect the earth?
Group Discussion
Remember these three words:
reduce
reuse
recycle
plant trees
2019.4.8
Let’s make our mother smile again!
We have only one earth. If we don't take good care of it, we will have no places to live on.
Whether life will continue on the earth depends on human beings.

Whatever we do will make a difference!
What would you advise humans to do to protect our earth ?
Write a letter.
Writing
Homework: