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必修3U4 Warming up and reading


Unit 4

Astronomy: the science of the stars

What science subjects do you know?

physics

Geology

[d?i'?l?d?i] ?

geography



biochemistry

astronomy

What is Astronomy? Astronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it.

The Solar System

In our solar system eight planets circle around the sun.

The Solar System

Can you name the eight planets?
Earth A. 地球 ______ F. 土星 Saturn['s?t?n] ________
萨杜恩农业之神 乌拉诺斯(天神 乌拉诺斯 天神) 天神

Jupiter['d?u:pit?] G. 天王星 Uranus['ju?r?n?s] B. 木星 ______ _______
朱庇特(罗马神话中的宙斯神) 朱庇特(罗马神话中的宙斯神)

C. 火星 ______ɑ:z] Mars[mɑ
马耳斯战神

H. 金星 Venus['vi:n?s] ________
维纳斯(爱与美的女神) 维纳斯(爱与美的女神)

Mercury['m?:kjuri] D. 水星 ________
墨丘利(众神的信使、商业神 墨丘利 众神的信使、商业神) 众神的信使

E. 海王星 Neptune ['neptju:n] _______
尼普顿(海神 尼普顿 海神) 海神

1111

In our solar system eight planets circle around the sun.

What interests you in astronomy? Do you know any questions that astronomers are interested in?

How was the universe formed? How did life begin on Earth?

Scientific Theories Famous scientists such as Newton, Einstein and Stephen Hawking had their own theory about the origin of the universe.

Careful reading Read the passage carefully and analyse its structure. A widely accepted theory about the earth, atmosphere and water Para 1:

Para 2: The formation of the earth. Para 3: The importance of water for life. life development Para 4: The development of plants and
animals on the earth. human beings Para 5: The arrival of humans and their impact on the earth.

formation of the universe.

1.How were stars and other bodies created?
A. Atoms combined to create them B . Clouds of dust combined to create them C . Water combined to create them D . Gases combined to create them

2 . Which is the most important for life appearing on the earth? A . Fire B . Rock C. Water D .Clouds

3 . It can be known from the passage that ________
? A . Plants and animals appeared on the earth at the same time ? B . Plants appeared later on the earth than animals ? C . Early shellfish apprared earlier than plants ? D. Animals appeared later on the earth than plants

4 . How many years did dinosaurs exist on the earth?

? A . More than 140 billion years million years More than 140 million years ? B. ? C . More than 140 thousand years ? D . More than 140 years

5 . Why can the earth become too hot to live on?
? A . Small clever animals produce more heat ? B. Small clever animals produce too much carbon dioxide ? C . Small clever animals don’t want heat to escape from the earth ? D . Small clever animals like to live on a hot planet

From the last paragraph we can C infer that the author is a little_ little_ ? A happy C worried B careless D excited

Can you put the order of development of life into a time line? Use the reading to help you.

? ? ? ? ? ? ? ? ? ?

(7 A ) (2 B ) (8 C ) (1 D ) (5 E ) (9 F ) (4 G ) (6 H ) (3 I ) ( )J 10

insects and amphibians appear a solid ball reptiles appear a cloud of dust shellfish and other fish appear dinosaurs appear small plants grow on the water plants begin to grow on dry land presence of water mammals (including humans) appear

Exercise 3. Think about what you have read and discuss these questions in pairs
? 1. Why was the earth different from the other planets ? ? Because the water remained on the earth ? 2 . Why did the plants grow before the animals came? ? Because plants provide 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 65 million years ago the age of dinosaurs ended ? 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 ?

Pluto
? The name is Pluto (冥王星). Scientists now think it’s too small to be called a planet

5. What problem is caused by human beings? ? Human beings cused global warming

What can we do to take care of the earth?
solar energy plant trees recycle rubbish

purify['pju?rifai] air save water

prevent desertification


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