人教版高中英语必修三第四单元PPT课件

熟知的理论
4. in all directions
向着四面八方
5ຫໍສະໝຸດ Baidu in time
及时；终于
6. cool down
冷却
7. be fundamental to…
对…关键
8. a chain action
连锁反应
9. …make it possible for…to do… 使…可能
10. give birth to…
5. What’s the significance of the presence of water on
the earth?
6.What was important to the development of fish?
7. What made possible the rise of mammals on the earth?
the sun / moon / earth（ ）
solar system（ ）
3. How many planets are in the solar system?
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I. Warming up
1.W h a t ' s the meaning “Astronomy”?
the science of stars;
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4. How did water come into being on the earth?
As the earth cooled down after it exploded, water came into being.
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5. What’s the significance of the presence of water on the earth? It allowed the earth to dissolve harmful gases and acids into the oceans and seas.
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火星 金星 Mars 水星Venus地球 Mercury Earth
木星
Jupiter
天王星 土星 Uranus Saturn 海王星
Neptune
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In this unit, we’ll learn something more scientific
1.What’s the title of the text? how life began on the earth
system?
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3
Scientists now think Pluto is too small to be called a planet
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The names of eight planets
1) 水星 2) 金星 3) 地球 4) 火星 5) 木星 6) 土星 7) 天王星 8) 海王星
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
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2. What form was the earth after the “Big Bang”? The earth was still just a cloud of dust.
3. What made up the earth’s atmosphere after the earth exploded? Carbon, nitrogen, water vapour and other gases.
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Nvwa made humans
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Read the passage quickly and answer the questions
1. When did the “Big Bang” happen? 2. What form was the earth after the “Big Bang”? 3. What made up the earth’s atmosphere？ 4. How did water come into being on the earth?
生育
11. prevent… from
阻止…做…
12. millions of years to come
未来的几百万年
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Scanning Read the passage quickly and answer the questions
1. When did the “Big Bang” happen? It happened several billion years ago.
Module III Unit 4 Astronomy
玉树二高2014级高一十四班
1
I. Warming up
1.W h a t ' s the “Astronomy”?
meaning
of the word
2. Do you know the following terms?
star（ ）
planet（ ）
of the word
2. Do you know the following terms?
star（恒星）
planet（ 行星 ）
the sun / moon / earth（ 太阳、月亮、地球 ）
solar system（ 太阳系 ）
3. How many planets are t h e r e in the solar
2. From the title, we can predict that the text may tell us the origin of life on the earth.
Do you know some stories about it?
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Pangu separates the sky from the earth
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6. What was important to the development of fish? oxygen.
7. What made possible the rise of mammals on the earth? The disappearance of dinosaurs made the possible the rise of mammals on the earth.
8. Why are mammals different from all life forms
in
the past?
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Phrases and Useful Expressions
1. circle around
绕…转
2. according to…
根据
3. a widely accepted theory