外研版高一英语必修一第五单元Module-5-A-lesson-in-a-Lab
外研版高中英语必修一Module 5 A Lesson in a Lab.doc
高中英语学习材料***鼎尚图文理制作***Module 5 A Lesson in a LabⅠ.单词拼写1.At the news that his favourite star took drugs, he was too ________ (吃惊的) to speak.2.The air in the balloon ________ (膨胀) when heated.3.Switch off the ________ (电)before you attempt any repair.4.The government has an interest in importing scientific ______ (设备).5.The house Osama bin Laden once lived in looked ________ (普通的).6.The interview will give you a chance to ________ (形成) an impression of the company.7.The white pollution has upset the ecological ________ (平衡) in the lake.8.New research shows that an excess of meat and salt can ________ (收缩) muscles.9.Iron ________ (反应) with water and air to produce rust.10.When the water ________ (煮沸),add the rice.Ⅱ.单项填空1.When we use metals, ________ is important to know how they react with different substances, for example, water and oxygen.A.as B.this C.that D.it2.________ I read, ________ I learn.A.The many books; the much informationB.The more books; the more informationC.The more books; the less informationD.The fewer books; the more information3.(2012·双鸭山模拟)—May I put my luggage on the seat beside you, sir?—________.A.With pleasure B.Go aheadC.Never mind D.Take it easy4.________,I would like to thank everyone who helped to make this event possible.A.In conclusion B.In funC.In word D.In case5.The government should pay more attention to the needs of ________ citizens.A.normal B.ordinaryC.usual D.general6.(2012·临沂模拟)The middle-aged woman joined the gym club with the ________ of losing weight.A.aim B.help C.access D.surprise7.The newly-built bridge ________ the beauty of the city.A. adds up toB. adds toC. adds upD. is added to8. I ________ very late during the summer vacation, but now I ________ up very early.A.am used to rise;am used to gettingB.am used to rise;used to gettingC.used to rise;am used to gettingD.used to rise;used to get9.She had to hold onto the table to ________ her balance.A.keep B.lose C.upset D.affectⅢ.阅读理解Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy; there's no need for a lot of scientific terms or expensive lab equipment. You only have to share your children's curiosity (好奇). Firstly, listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me “textbook questions” about schooling, salary (薪水) and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said,“Now that we've finished with your lists,_do you have questions of your own about science?”After a long pause, a boy raised his hand, “Have you ever seen a grasshopper (蚱蜢)eat? When I try eating leaves like that,I get a stomachache. Why?”This began a set of questions that lasted nearly two hours.Secondly,give them time to think. Studies over the past 30 years have shown that,after asking a question, adults typically wait only one second or less for an answer, no time for a child to think. When adults increase their “wait time” to three seconds or more, children give more logical(符合逻辑的), complete and creative answers.Thirdly, watch your language. Once you have a child involved in a science discussion,don't jump in with “That's right” or “Very good”. These words work well when it comes to encouraging good behaviour (行为). But in talking about science,quick praise can signal that discussion is over. Instead, keep things going by saying “That's interesting” or “I'd never thought of it that way before”,or coming up with more questions or ideas.Never push a child to “think”. It doesn't make sense. Children are always thinking,without your telling them to. What's more, this can turn a conversation into a performance. The child will try to find the answer you want,in as few words as possible,so that he will be a smaller target(目标)for your disagreement.Lastly, show; don't tell. Real-life impressions of nature are far more impressive than any lesson children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass (放大镜) ,and they'll understand why you want them to wash before dinner. Rather than saying that water evaporates(蒸发), set a pot of water to boil and let them watch the water level drop.1. According to the passage, children are natural scientists, and to raise their interest, the most important thing for adults to do is ________.A.to let them see the world aroundB. to share the children's curiosityC. to explain difficult phrases about scienceD. to supply the children with lab equipment2.In the last sentence of the first paragraph, the underlined word “lists”could best be replaced by ________.A.any questionsB.any problemsC.questions from textbooksD.any number of questions3.According to the passage, children can answer questions in a more logical, complete and creative way if adults ________.A.ask them to answer quicklyB.wait for one or two seconds after a questionC.tell them to answer the next dayD.wait at least for three seconds after a question敬请批评指正。
外研版英语必修一 Module 5 A Lesson in a Lab Language point
4) The company is aiming at training / to train everyone by the end of this month. 力争做到,可构成短语aim at doing sth. / aim to do sth.”。
5) The book is aimed at children under 5 years old.
the crew at sea.
A. added to
B. resulted from
C. turned out D. made up
add to 增加,增添; result from 由…产生; turn out 结果是; make up 组成。 根据句意“轮船发动机失灵,恶劣天气又 增加了海上船员的无助”可知选A。
浓 厚 的 文 化 底蕴、 教育的 理念、 教育的 聪明,使 教师们 逐步向 专业化 发展。 “ 销 ” ——当 然 产 这个环 节还是 其次,最 重要的 是的校 领导积 极的与 教育局 上级领 导 沟 通 ,为 优 秀青年 教师的 提升与 学习展 搭道路 ,的校领 导在舍 与得之间为整个民族 的 教 育 事 业 拓宽道 路,从民 族之思 出发,打 破一时 一地的 教育局 限。真是上善若水的
keep order in their classes. He gave his order to the waiter. (翻译) 有些教师觉得课堂秩序很难维持。 他把他点的东西告诉服务员了。
v. 命令;定购;点餐 e.g. He ordered three new suits for himself.
8. This will keep air out of the water.
keep sb./sth. out of 意为“不让某人/某物 进入某处”。
外研版高中英语必修一《Module 5 A Lesson in a Lab》课件
1. To consolidate basic vocabulary about an experiment
2. Learn the skills to prepare a report on a simple scientific experiment.
reaction water Conclusion : Iron doesn’t rust.
______
experiment In
Result : the nails rust in the tube.
or_d_i_n_ary Conclusion: Iron rust.
water
Let’s learn how to prepare a report
First of all , put some iron nails at the bottom of a test tube, and push some cotton wool down the tube . Then , leave the tube for one week. At last we will find out the nails have not rusted.
2. conclusion something reaches as it grows
or develops.
3. aim
c. Something you hope to achieve by doing something .
So we can draw a conclusion : Iron doesn’t rust in dry air.
知识初探-词义搭配
a. average, common, or usual , not
高中英语外研版:必修一 module 5 a lesson in a lab 含答案
Module 5 A Lesson in a Lab一、刷黑板——词汇全听写(先过识记默写关)Ⅰ.阅读词汇(英译汉)[第一屏听写]1.liquid n.液体2.contract vi. 收缩3.substance n. 物质4.oxygen n. 氧气5.rust vi. 生锈[第二屏听写]6.partial adj. 部分的;局部的7.steam n. 蒸汽;水汽8.flame n. 火焰9.potassium n. 钾10.sodium n. 钠[第三屏听写]11.calcium n.钙12.magnesium n. 镁13.aluminium n. 铝14.zinc n. 锌15.copper n. 铜[第四屏听写]16.oxide n.氧化物17.dissolve vi. 溶解;分解;分离18.crucible n. 坩埚19.tongs n. (复)夹子;小钳子Ⅱ.高频词汇(汉译英)[第五屏听写]1.expand vi. 膨胀2.mixture n. 混合物3.electricity n.电4.stage n. 阶段;时期5.conclusion n. 结论[第六屏听写]6.aim n.目标;目的7.reaction n. 反应8.electrical adj. 与电有关的;用电的9.equipment n. 设备;装备10.react vi. (化学)反应[第七屏听写]11.ordinary adj. 普通的;平常的12.form vi. 形成13.balance n. 天平14.lecture n. 演讲15.department n. (大学的)科、系[第八屏听写]16.astonished adj. 吃惊的;惊愕的17.float vi. 漂浮18.facility n. (常作复数)设备;工具19.boil vt. 煮;煮沸20.add_..._to_... 往……加入……[第九屏听写]21.used_to 过去(常常)22.in_the_area_of 在……领域23.be_proud_of 为……感到骄傲/自豪24.be_supposed_to 应当;理应二、刷清单——热身自盘点(再过基本应用关)(一)核心单词。
外研版高中英语必修1Module5 A Lesson in a Lab(1)
Module 5 A Lesson in a LabIntroduction and ReadingI.Teaching aims:1.To learn about some vocabulary and knowledge related to science and experiments2.To know how to do a simple experiment and write the report about it in English3.To raise students’interests in science and form the rigorous scientific attitude.II.Teaching points:1.To make the students understand and grasp the vocabulary and knowledge related to science and experiments2.To enable the students to know how to read some passages about simple scientific experiments3.To make students learn how to write an experiment report in English III.Teaching methods:municative Approach2.Task-based Approach3. Aural-oral Approach with the help of the multi-media computer and the recorderIV.Teaching procedures :Step 1: Lead-inAt first show the students the picture of a lab with the help of computer and ask the students to discuss following questions in groups:1.Are you interested in doing scientific experiments?2.Suppose you want to do a chemical experiment about some metals, do you think it is necessary to know about how they react with other substances?3.In order to carry out an experiment successfully, what should you prepare for it?This step is to warm up the students and raise their interests to speak English in class. Because all these questions are very close to the students’daily life and studying .Step 2: Pre-readingAsk some questions: How much you know about general science ?And How much do you know about general science?How many states does matter exist as? Then read the words about metalstogether.Step 3: ReadingPassage A1. Listen to passage A quickly and choose the best title for it.2. Read passage A carefully and answer1). Which of the metals in the table reacts the most with oxygen and water?2). What happens when you heat calcium in oxygen?3). Which metals react with steam?4). Does iron have a slow or fast reaction with steam?5). Does copper react with water?Passage B1. Some important words about the experiment2. Put these words in the correct order to describe the stages of a scientific experiment.3. Read Passage B, tell the stagesStep 4:DiscussionSince we have known about how to do a scientific experiment, l et’s do a simple experiment to test if magnesium can burn in the air and write a short report.V.HomeworkGo into your science lab and tell your class the apparatus.。
高一英语外研版必修1《Module 5 A Lesson in a Lab reading》课件
4. To raise students’ interests in science.
Feedback
Discussion and Writing
李华做了一个实验。为了比较橘子汁和 油在水中的溶解速度,他将水倒入两个试管 里,保证两根试管内的水量相等; 同时在一根 试管内放入一勺橘汁(a spoonful of orange juice),在另一根内放入一勺油, 等待5分钟 后,橘汁溶解,但是油仍然留在水的表层。
From passage A we know the _re_a_c_t_io_n_ of metals with some_s_u_b_s_t_a_n_c_e_s such as water and oxygen can be put _i_n_o_r_d_e_r__ . It can be seen that the metals react most_a_t_t_h_e_t_o_p, and the metals react least _a_t _th_e__b_o_t_to_m__.When you heat calcium in oxygen, you'll find it burns to _f_o_r_m__ an oxide. And it can easily be seen that copper doesn't _r_e_a_c_t with water.
1. What we have learned in this class. 2. The assessment of your performance;
高中英语外研版必修一《module 5 a lesson in a lab》课件
重点单词
点拨 (1)achieve one’s aim实现某人的目标 take aim at向……瞄准 with the aim of意在…… aim to do sth./aim at doing sth. 力求做某事 be aimed at目的是;旨在 (2)aimless adj.无目的的 aimlessly adv.无目标地 【点津】在take aim at中,aim前不能加冠词,即便aim前有形容词,也不可 加冠词。
重点单词
重点短语
重点短语
1. add...to...往……加入……;把……加到…… 教材原句 ① Add (add) some oil to the water. ◆单句填空 ②(202X课标全国Ⅲ) Adding (add) the money to her fund made Georgia agree to sell some of her objects. ③The dictionary is out of date: many words have been added to the language since it was published.
重点单词
④In our daily life, everyone fails every now and then. It is how you react that makes a difference. ◆完成句子 ⑤He didn’t believe it and even reacted strongly against me. 他不相信,乃至强烈反对我。 ⑥ How a person reacts to criticism often means the difference between success and failure.一个人对批评做出怎样的反应通常意味着他是成功 还是失败。
外研版 必修一 Module5 A Lesson in a Lab_课件(38张PPT).ppt
①keep/lose one's balance保持/失去平衡 break the balance破坏平衡 make up the balance补足差额 on balance总的来说 keep the balance of nature保持生态平衡 ②balance A against B 权衡/比较A与B ③balanced adj.保存平衡的 a balanced diet均衡饮食
He is taller by far than his brother. =He is by far the taller of the two brothers. 他比他兄弟高多了。(注意by far的不同位置) Are you feeling any better today? 你今天感觉好些了吗?
【答案】 A
翻译句子
①——我可以借你的字典吗? ——可以,拿去吧。
—
.
—
.
②我要先走一步,告诉他们你在路上。
. 【答案】 ①Can I borrow your dictionary?Yes, go ahead. ②I'll go ahead and tell them you're on the way.
Integrating Skills & Grammar
教师用书独具演示
●教学目标 (1)熟记学案中所列出的单词和短语。 (2) 通 过 学 案 中 所 给 出 的 重 点 单 词 和 重 点 短 语 的 学 习,让学生能够正确理解和使用这些单词和短语,能够运 用这些词语造句。
(3)听懂课文中所给出的听力材料。 (4)通过对语法的教学让学生能够理解并能够正确运 用形容词和副词的比较级。
【对接高考】
外研版高中英语必修一 Module 5 a lesson in a lab grammar(共19张PPT)
2.“越来越”; “越…,越…”
1) -er form + and + -er form 2) the + -er form, the + -er form
Look at the following sentences. Underline the adverbs used to modify the comparative expressions.
Let’s create!
1.The more balanced a diet you have, the healthier you will become.
2. The healthier you are, the more energetic you will be.
3.The more energetic you are, _____________. 4.____________________, ________________. 5. ____________________, ________________.
A nail rusts much more easily in the water than in the air.
4. chemistry/rather/easy/English
Chemistry is rather easier than English.
3.修饰比较级的副词
farmers
F ar, by far A lot, a little, a bit, a great deal, any Rather Much E ven Rather S till
20 kilograms
(heavy/weight)
1) A panda is 10 times as heavy as a golden monkey.
外研版高一英语必修一 Module 5 A Lesson in a Lab 重点知识点讲解
外研版高一英语必修一Module 5 A Lesson ina Lab 重点知识点讲解1.When you heat a metal,it expands.当你加热金属时,它膨胀。
★考点expand vi. 膨胀A tyre expands when you pump air into it.轮胎一打气就鼓起来。
2.It is hard to think of a world without metals.很难想象一个没有金属的世界。
剖析本句句型为:It’s+形容词+动词不定式短语,句型中it为形式主语,动词不定式短语为真正的主语。
★考点think of想象,设想归纳:think highly of意义高度评价think about意义考虑think over意义仔细考虑3.Different metals have different uses,for example,steel is used in cars,and iron is used in electrical equipment.不同的金属有着不同的用途。
譬如,钢用于车辆,铁用于电子设备。
★考点equipment n. 设备;装备知识归纳:equip sth.with sth.意义用某物来装备某物equip sb.for sth.意义使某人为某事做好准备/使某人有能力做某事4.When we use metals,it is important to know how they react with different substances,for example,water and oxygen.使用金属时,要了解金属和不同的物质(例如水和氧)如何发生反应,这一点很重要。
★考点react vi.(化学)反应react with意义与……起反应react to意义做出反应,回应react against意义反对,反抗5.Aim:To find out if iron rusts (a)in dry air;(b)in water that has no air in it(air-free water);(c)in ordinary water.。
外研版高一英语必修一Module5 A Lesson in a Lab
外研版高一英语必修一Module5 A Lesson in a Lab-Cultural Corner(导学案)课前预习学案一、预习目标预习Cultural Corner,初步认识国外学校学习科学的现况。
二、预习内容1 Do exercises.2 Read the text and do Exercise1.三、提出疑惑Write down the problems you cannot settle after learning the text independently.(1)(2)课内探究学案一、学习目标1.知识目标learn and grasp the following important useful new words and expressions in the part:lecture,astonished,used to do,be supposed to do and so on2.能力目标1) Improve the ability in reading.2) Grasp the meaning of the words from the context.3.情感目标1) To know about science teaching in Canada.学习重难点重点短语用法及如何运用所学知识点解决相关的练习题。
二、学习过程Ⅰ【知识链接】:Words: 1. 设备;工具_________ 2. 演讲________ 3. (大学)科;系_________4. 吃惊的;惊愕的_________5. 发现n. _________Phrases: ed to do ___________ 2.the latest equipment __________3.be supposed to do ___________4. be proud of _________5.science facilities____________6. make discoveries in___________Keys:Words: 1.facilities 2.lecture 3. department 4. amazed 5. discoveryPhrases: 1.过去常常做某事2. 最新的设备3. 理应或应当做某事4.以------为自豪5.科学设备6. 在某领域做出发现Ⅱ【自主学习】部分句子解析:1. The Noble Prize is the highest scientific prize there is, so we should be very proud of that. 诺贝尔奖是最高的科学奖,所以我们应该为此而感到骄傲。
外研版高一英语必修一第五单元Module 5 A lesson in a Lab
earth is 150,500,500 kilometers.
6. (a) The earth is 4.6 million years old.
(b) The earth is 4.6 billion years old.
7. (a) The earth is twice as large as the
Do exercises 5 and 6 on page 92.
形容词和副词比较等级的用法
1. 原级比较:两者程度相同。用句型as+
形容词/副词+as表示, 否定名式为: not as/so+形容词/副词as。 Example: 1.Dick is as tall as his brother. 2.Tom speaks as quickly as his cousin. 3. I have never seen a person as / so clever as he is.
2. 比较级:
A. 表示A超过B。此时用形容词和副词的
比较级。
Example: 1.Our classroom is brighter than yours. 2.Dogs run faster than rabbits.
3.I don‘t think math is more important than physics.
2
3 4
air – gas - oxygen contract - expand earth – sun - moon gas – liquid - solid
Answer these questions.
electricity iron metal steel air glass 1. Which of the above are natural? Electricity, iron, some metals and air are natural. 2. Which are man-made?
高一英语 Module 5 A Lesson in a Lab课件 外研必修1
MODULE 5 A Lesson in a Lab
Reading and Vocabulary
Passage B A Simple Scientific Experiment
B
B.aim
D.method
A.result
C.conclusion
D
A
C
The stages of a scientific experiment
air
doesn’t rust
boil
make sure
Adding
keep
nails
air-free
half-fill
ordinary
Iron in air-free water
Method (1) Half- fill a test tube with water. (2) Boil the water for three minutes. (3) Put two or three nails in the water. (4) Add some oil to the water. This will keep air out of the water. (5) Leave the tube for one week.
Iron in ordinary water
Iron nails rust in wet air.
Passage B
cotton wool
nails
water
water
water
The nails haven’t rusted
The nails do not rust
The nails rust
some oil
英语必修一外研版 Module 5 A Lesson in a Lab :Period 3 Language Points
Period 3 Language Points【学习目标】知识与技能1. 尝试分析课文中的长难句并对句子结构有初步的认识;2.总结课文中重点词汇的用法,并能够正确使用。
过程与方法:自主分析课文中的长难句,并与以前学过的内容相结合;在分析长难句的过程中,进一步熟悉原来学过的词汇、短语。
情感态度与价值观:认识到英语知识点的重要性。
【教学重难点】分析文章长难句【Self-study】重点词汇回顾:1. conclusion ____________;2. expand __________;3. contract ___________4.substance _____________;5. mixture ___________;6. object ____________7. react ___________;8. method ___________.高频短语回顾:1._________________________ 按顺序排列……;使……有条理2._____________________ 往……加入……3.______________________ 不让……入内【Further Study】1. It is hard to think of a world without water. 【译】__________________________________it 为形式主语,真正的主语是_____________,构成了It is/was+adj.+to do sth.结构【注】It is +adj.+for sb. to do sth.该句式中,作表语的形容词只能说明不定式的行为性质和特点,不能说明不定式的执行者。
常见的这类形容词有:easy,important,difficult,hard,possible,impossible,necessary等。
例:It’s very important foe you to learn English well.It is+adj.+of sb. to do sth.该句式中,作表语的形容词表达不定式的逻辑主语的品行、性格或性质。
高中英语Module 5 A Lesson in a Lab课件
√B. copper
C. potassium
D. all metals
3.According to the passage , it can be
inferred that
will have less use in
making kitchen tools.
√
II. Read the passage B and fill in the table.
2.What should be included in a description of an experiment according to Passage B? (1)__________ (2) ___________(3)___________ (4)___________(5)___________
experiment according to Passage B? (1)___A_i_m_____ (2) _A__p_p_a_r_a_t_u_s_(3)__M__e_t_h_o_d___ (4)__R_e_s_u_l_t____(5)_C_o_n__cl_u_s_io_n__
Careful-reading
A. how iron reacts with air B. iron is quite easy to rust C. how to prevent iron from rusting
√D. how iron reacts with air and with water
2.“Air-free water〞 means . with a lot of water without water with a lot of air
3. To learn some useful words and expressions in the passage.
外研版高中英语必修一Module 5 A Lesson in a LabReading and vocabulary课件ppt
water
Stage B (1 week later)
Stage C (Result)
nails
water
Iron does not rust
Iron does Iron rusts not rust
Read the passage again and complete the sentences.
Reading and vocabulary
Passage A
Read the passage as quickly as you can and choose thHale Waihona Puke best title for it.
The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen
3. Which metals react with steam? Magnesium, aluminium and zinc.
4. Does iron have a slow or fast reaction with steam? It has a slow reaction.
5. Does copper react with water? No, it doesn’t.
1. In the first part of the experiment, the _a_ir_ is dry, not wet. 2. It shows that iron _d_o_e_s_n_o_t _r_u_st when the air is dry.
3. In the second part of the experiment, you must _b_o_i_l the water to make sure there is no _a_i_r_ in it. 4. You add __s_o_m__e_o_i_l to the water because this keeps _a_i_r_ out of it. 5. It shows that _n_a_il_ does not rust in water that has no _a_i_r_ in it.
外研版英语必修一module 5 a lesson in a lab grammar
B:Jupiter is ten times bigger than the earth.
Diameter (Earth=1) (big/size) Jupiter=11
C:Jupiter is eleven times the size of the earth.
含比较级的特殊句型
❖越来越…
❖ 越…越…
C:Mount Qumolangma is about six times the height of Mount Tai.
Winter in Harbin
Winter in Beijing
-20℃(cold/coldness) -5℃
A:Winter is four times as cold in Harbin as in Beijing.
Winter in Harbin Winter in Beijing
-20℃(cold/coldness) -5℃
Diameter (Earth=1) Jupiter=11 (big/size)
Example:
A: The Yangtze River is about four times as long as the Songhua River.
1.This metal is very /a bit heavier than steel. 2.Lead is a lot/lots of heavier than steel. 3.This chemistry experiment is rather/any more complicated.zxxk 4.It is a little/lots of longer than before.
Pair work: Look at the passage and conclude the sentences structure.
高中英语外研版必修1课件:Module 5 A Lesson in a Lab 重点回顾
那个孩子骑在他的新自行车上不能保持平衡。
10.be proud of为……感到骄傲/自豪
takeprideindoing sth.以(做)某事感到自豪
beproudttohatdo sth.以……为荣,为……而感到自豪 proudly adv.骄傲地;自豪地
He was proud of having such a good friend.
他为有这样的好朋友而自豪。
11.astonished adj.吃惊的;惊愕的
be astonished at...对……感到惊讶
be astonished to do sth.因做某事感到惊讶 astonish vt.使……吃惊 astonishing adj.令人惊讶的, 惊人的(常修饰物)
solved.现在我们不得不正视这个难题并试图解决它。
4.react vi.(化学)反应
react with sth.与某物发生(化学)反应 react tosb./ sth.对……作出反应,回应 react against sth.反抗,反对…… reaction n.反应,回应(常接介词to) Children tend to react against their parents by going against
到了她该好好安排自己生活的时候了。 6.add...to...往……加入……
add to增加,增添 add...up把……加起来 add up to加起来总共是,合计达
Add up your scores and see how many points you get.
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2. Steel is a mixture of iron and other substances. mixture n. 混合物
Example: 1.The mixture of drinks made me feel bad.
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doing an experiment
2
dissolve crucible
tongs
3
solid / liquid / gas
4
test tube
Bunsen burner
balance
5
Guess, listen and check the answer. 1. (a) Water exists as a solid, a liquid and
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1. When you heat a metal, it expands. expand vi. 膨胀,扩张
Example: 1.The petals of many flowers expand in
the sunshine. 许多花的花瓣在阳光中绽放。
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反义词 contract vi. 收缩 n. 合同 Example: 1.The heat contracted the woolen sweeter.
Electricity, iron, some metals and air are natural. 2. Which are man-made? Steel, some metals and glass are manmade.
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3. Which can be both? Electricity and some metals (alloys for example) can be man-made and occur naturally.
a gas. (b) Water exists as a solid and a liquid
only. 2. (a) When you heat a metal, it expands.
(b) When you heat a metal, it contracts.
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3. (a) Steel is a mixture of iron and other substances.
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B. 表示A不如B。 句型:less+形容词 /副词原级。
Example: 1.Rabbits ran less fast than dogs. 2.Jenny is less clever than her sister. 3.It rains less often here in autumn than in spring.
mix v. 混合 mix A with B
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substance n. 物质 Example: 1.Beware of what you do with this
dangerous substance. 你处理这些危险品时,可要当心。
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Do exercises 5 and 6 on page 92.
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3. 形容词和副词比较级的特殊用法 A. 越来越……
比较级+ and+比较级 Example: 1.You are growing taller and taller.
liquid oxygen moon
sห้องสมุดไป่ตู้n
expand
gas solid
1 air – gas - oxygen 2 contract - expand 3 earth – sun - moon 4 gas – liquid - solid
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Answer these questions.
electricity iron metal steel air glass 1. Which of the above are natural?
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7. (a) The earth is twice as large as the moon.
(b) The earth is forty-nine times larger than the moon.
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Put the words in pairs or groups.
contract air earth
(b) Steel is a mixture of iron and oxygen.
4. (a) Two-thirds of the earth’s surface is water.
(b) 50% of the earth’s surface is water.
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5. (a) The distance of the sun from the earth is 25,5000 kilometers.
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2. 比较级: A. 表示A超过B。此时用形容词和副词的
比较级。
Example: 1.Our classroom is brighter than yours. 2.Dogs run faster than rabbits. 3.I don’t think math is more important than physics.
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形容词和副词比较等级的用法
1. 原级比较:两者程度相同。用句型as+ 形容词/副词+as表示, 否定名式为: not as/so+形容词/副词as。
Example: 1.Dick is as tall as his brother. 2.Tom speaks as quickly as his cousin. 3. I have never seen a person as / so clever as he is.
(b) The distance of the sun from the earth is 150,500,500 kilometers.
6. (a) The earth is 4.6 million years old. (b) The earth is 4.6 billion years old.