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辽宁省抚顺市第十二中学人教版高中英语必修三 Unit 4 Astronomy（导学案） (2份打包)
辽宁省抚顺市第十二中学人教版高中英语必修三 Unit 4 Astronomy（导学案2）.doc
辽宁省抚顺市第十二中学人教版高中英语必修三 Unit 4 Astronomy（导学案）.doc
Unit 4 Astronomy
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? (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
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.
Questions:
1. What do we mean when we say we are studying a subject scientifically? Or what’s the correct attitude towards science?
We should be objective, not superstitious.
2. What’s the correct way to prove a scientific idea?
We should design experiments to test it for several times.
Then we can analyze the results and draw a conclusion at last.
3. What are the most important skills we need to be real scientists?
Careful, objective and logical, draw conclusions from the experiments and not impose conclusions on the data.
(impose…on… 把…强加于…)
Reading
I. Read the passage carefully and analyse its structure. Write down the main idea for each paragraph.
Para1 A widely accepted theory about the formation of the universe
Para2 The formation of the earth
Para3 The importance of water for life
Para4 The development of plants and animals on the earth
Para5 The arrival of humans and their impact on the earth
II. Read the text and fill in the blanks in the following form.
Time What happened
Big Bang ______ began to form and combine to create stars and other bodies.
Between 4.5 and 3.8 billion years ago ●Dust settled into a solid and ______ globe.
●The earth exploded to produce its___________ .●The continued ________ of water allowed the earth to dissolve harmful gases and _____ into the oceans and seas.
Many millions of years later ●The first small plants on the surface of the water produced_______ .
●Early _______ and all sorts of fish appeared.●Green plants began to grow on land. ●Insects and___________ appeared.
Unit 4 Astronomy：The science of the stars
1. spread
vt.&vi. 展开,铺开;散布;扩大;延伸
The bird spread its wings. 那只鸟展开了翅膀。
Flies spread disease. 苍蝇传播疾病。
常用结构:
spread sth. with sth. 用……抹/涂/铺……
spread ...on ...把……抹/涂/铺在……
be spread for摆好（桌子）准备
spread oneself\[口\]舒展四肢(躺下)
spread out张开，伸开，铺开，展开，伸长
高手过招
单项填空
Paper making began in China and to Europe.
(2009•12•河南郑州检测)
A. Spread B. grew
C. Carried D. developed
解析:选A。句意为：造纸术起源于中国，又传播到了欧洲。spread传播。
2. method
n. 方法
He has introduced a new method of teaching.
他引进了一种新的教学方法。
What is the most effective method of birth control?
控制出生率的最有效的方法是什么？
联想拓展
by this means=in this way=with this method
用这种方法
易混辨析
method/means
method侧重“理论方法”，指做某事的具体步骤或程序。
a new teaching method一种新的教学方法
means（单复数同形）侧重“通过手段”或“利用工具”去达到某种目的。
高手过招
选词填空(method/means)（原创）
①The quickest of travel is by plane.
②She has a very scientific of dealing with political problems.
答案：①means②method
3. harmful
adj. 有害的
常用结构:
do sb. harm/do harm to sb. 对某人有害
mean no harm 无意伤害别人;没有恶意
harm one’s image/reputation 损害某人的形象/名声
do more harm than good 弊大于利
There is no harm in (sb.s) doing sth.
=It does no harm (for sb.) to do sth. (某人) 做某事无害处
be harmful to 对……有害
harm n.&v. 损害，伤害
Smoking is harmful to your health. 吸烟有害健康。
高手过招
单项填空
He is a nice dog. He won’t do you any .（原创）
一、 ill B. bite C. hurt D. harm
解析:选D。考查固定搭配。do sb. harm/do harm to sb. 表示
“对某人有害”。句意为：这是一条温顺的狗，它不会伤害你。
故选D。
4. mass
n. 质量；团；块；大量；(前加the) 群众
A liter of gas has less mass than a liter of water.
1公升气体的质量少于1公升水的质量。
She has a mass of things to do.
她有一大堆的事情要做。
The masses have boundless creative power.
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