(共25张PPT)
Unit 4 Astronomy:
the science of the stars
Mercury
水星
Venus
金星
Earth
地球
Mars
火星
Jupiter
木星
Saturn
土星
Uranus
天王星
Neptune
海王星
Astronomy ?
Are you interested in
Step 1
A quiz on astronomy
3. Earth is the only planet moving around the sun.
True or False
The earth moves around the sun.
T
F
2. It takes the earth one day to move around the sun.
5. There is atmosphere on the moon.
4. The earth is the only planet in the solar system which has living creatures.
a year
8 planets
no
F
F
T
How the universe began according to Chinese culture ?
In China, we all know that Pangu separates the sky from the earth.
Let’s brainstorm the following questions
Chinese Legends (传说)
Pangu separated the sky from the earth.
His whole body then turned into all kinds of things in the universe.
盘古开天辟地
Other legends about the beginning of universe
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
Look at title and the pictures. Can you predict what we will learn from the text ?
Big bang ???
Pre-reading
Pre-reading
The evolution(development) of life on the earth ???
How life began on the Earth
Fast reading
Match the main idea with each paragraph.
How many paragraphs?
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
impact on the earth.
Para. 5 E The development of plants and
animals on the earth.
Careful reading
Task one (para 1)
What is the widely accepted theory in Para 1?
The universe began with a "Big Bang" that throw matters in all directions.
a cloud of _____
Big Bang
a solid _______
slowly combine
the earth ______ down
it exploded loudly with _____ and _____
the earth’s ___________
dust
ball/globe
fire rock
atmosphere
cooled
How did the earth come into being(产生)?
Task two (para 2)
Why is water so important for the beginning of life?
?
Paragraph3
dissolve harmful gases and acids into
the oceans and seas.
Because water allowed the earth to
What life developed after water appeared?
Paragraph4
small plants
green plants
forest
early shellfish and all sorts of fish
insects and amphibians
reptiles
dinosaurs
mammals
About 2.6 million years ago
Now
Humans produce too much carbon dioxide , making the earth too hot to live in.
Para 5
After the clever animals (humans) became important on the earth, what happened?
Answer question
Para. 1 A widely accepted theory about the formation
of the universe.
Para. 2 The formation(形成) of the earth.
Para. 3 The importance of water for life.
Para. 4 The development of plants and animals on the
earth.
Para. 5 The arrival of humans and their impact on the
earth.
Task three
Put the order of these sentences. ( ex. 2, p 27)
□ 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 grew on the dry land.
□ 7.The earth was a cloud of dust.
□ 8.Water appeared on the earth.
□ 9.Shellfish and other fish appeared.
□ 10.The universe begin with a “big bang”
□ 11.Clever animals with hands and feet appeared.
□ 12.Mammals appeared.
1
2
3
4
5
6
7
8
9
10
11
12
Big Bang
4.5-3.8 billion
many million years later
2.6 million
Now
⊕
⊕
⊕
●
●
●
●
●
●
●
●
★
Time
Events
Big Bang
dust
solid globe
water appears
small plants
shellfish and fish
plants grow on the land
insects and amphibians
reptiles
dinosaur
mammals
clever animals
humans
life
earth
In the last paragraph, we know humans face seriously global warming problem, which is threatening our existence. Can you write something to call on us to protect our environment ?
Discussion
The earth we live in is becoming more and more terrible, so we must take measures to deal with it
Firstly:
Secondly:
Thirdly:
We hope the environment will become more and more beautiful.
Sample
The earth we live in is becoming more and more terrible, so we must take measures to deal with it
Firstly, the government should pass laws to prevent people and factories from polluting the environment. Secondly, everyone should realize the importance of the problem and try their best to protect the environment and fight against pollution. Besides, it’s a good ideas to plant trees to improve the environment.
We hope our earth will become more and more beautiful.
例文
作业 1 背诵范文
1. Learn the new words by heart.
2. Read the text, and prepare the difficult words, phrases and sentences in the text for next period.
Homework 作业2