人教高中英语必修3Unit4 Astronomy: the science of the stars Warming up and Reading I（共30张PPT）

(共30张PPT)
Unit 4
Astronomy: the science of the stars
Warming up and Reading I
Warming up
What are the names of the eight
planets that circle around the sun?
Warming up
What are the names of the eight
planets that circle around the sun?
Warming up
What interests you in astronomy?

Do you know any questions that astronomers are interested in?
How the universe began?
How life began?
Is there life on other planets?
Are there other life forms in the universe?
…
Pre-reading
1. The origin of life on earth is a question that interests astronomers. What do you know about it?
How old is the universe?

How old is the earth?

Which were the first creatures or plants on earth?

Pre-reading
How old is the universe?
(several billion years ago)

How old is the earth?
(between 4.5 and 3.8 million years ago)

Which were the first creatures or plants on earth?
(very small air-breathing creatures)
1.insects
2.plants
3.reptiles（爬行类）
4.shellfish（贝类）
5.fish
6.amphibians（两栖类）
7.mammals(哺乳类)
Study of the groups of life
Look at the pictures and tell the groups .
Pre-reading
2. Each religion and culture has its own ideas about how life began on earth. What do you know?
In China, we all know that Pangu separates the sky from the earth.
Pangu separates the sky from the earth
Pangu separated the earth and sky with an ax. After he died, his breath became wind and cloud; his voice became thunder and his left eye sun and right one moon; arms and legs became edges and mountains; blood became rivers and tendon (筋脉) became roads; muscles became fields and hair stars; teeth and bones became metals, pearls and jade; sweat became rain.
The beginning of the life
Pangu separated Nvwa created God created
the sky humans the world
盘古开天 女娲造人 上帝创世论
The Biblical Account
Day 1: God spoke and separated light from darkness creating Day and Night
Day 2: God spoke and separated the water creating sky and ocean
Day 3: God spoke and created dry land
Day 4: God spoke and created the sun, moon and stars
Day 5: God spoke and created living creatures in the air and sea
Day 6: God spoke and created the land animals and man
Day 7: God rested and blessed this day calling it Holy
India

Brahman (婆罗门) is the god first represented in the Hindu Triad. He is the creator of the universe and all living beings are said to have evolved from him.
Pre-reading
Read the title and look at the pictures.
Predict what the reading will be about.
Reading

How life began on the earth
The Big Bang
Big Bang
A solid ball
The earth
Atmosphere
Skimming
Reading strategy(策略):
Go through the passage quickly to get the main idea of each paragraph.
Skim the passage and match the main idea with each paragraph.
Para. 1 The formation(形成) of the earth.
Para. 2 The importance of water for life.
Para. 3 A widely accepted theory about the formation of the universe.
Para. 4 The arrival of humans and their
impact on the earth.
Para. 5 The development of plants and
animals on the earth.
Scanning
Put the order of development
of life into a timeline.
Scanning: Put the order of development of life into a timeline.
1. Insects and amphibians appeared.
3. The earth became a solid ball.
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.
Key: 10 7 3 8 4 9 6 1 5 2 12 11



1. Small plants in water
2 ._______ and all sorts of fish
3. Green ____ on land
4. ____ (on land)
5. Amphibians (on land and in ____)
6. Plants grew into _______.
8. __________ (on land)
9. __________ (on land)
Have a try: Talking about the development of life
7. _____ (on land)
10. ____________ (small clever animals on land)
Shellfish
Insects
water
plants
forests
Reptiles
Dinosaurs
Mammals
Human beings
Close reading
1. Why was the earth different from the other planets?
2. Why did the plants grow before the animals came?
3. Why is it wrong to show films with dinosaurs and people together?
4. There used to be nine planets in the solar system. Recently scientists have decided that one of them can no longer be considered a planet. Do you know the name of that planet? Do you know why they removed it?
5. What problem is caused by human beings?

Close reading
1. Why was the earth different from the other planets?
Because water remained on the earth.


The significance(意义) of the continued presence of water is that it allowed the earth to dissolve harmful gases and acids into the oceans and seas.

Close reading
2. Why did the plants grow before the animals came?
Because plants provided oxygen for animals to breathe.
3. Why is it wrong to show films with dinosaurs and people together?
Because dinosaurs died out long before human beings developed on the earth.
Close reading
4. There used to be nine planets in the solar system. Recently scientists have decided that one of them can no longer be considered a planet. Do you know the name of that planet? Do you know why they removed it?
The name is Pluto. Scientists now think it is too small to be called a planet.
5. What problem is caused by human beings?
Human beings cause global warming.
How to protect the earth and make it a better place to live on?
Talking bar
* Read the text aloud after the tape, paying attention to pronunciation, intonation and rhythm.

* Surf the Internet to find more information about Astronomy and you are expected to present it to your classmates in the next period.