英语： Module 5 A Lesson in a Lab(第二课时)课件 外研版必修1

We can reach a conclusion that it is important for us to read books.
It is our aim to build up a harmonious society.
It is a piece of electrical equipment.
Reading and vocabulary
Passage A
Read the passage as quickly as you can and choose the best title for it.
The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen
e up with 突然想起→come to life 苏醒； 活跃起来
8.from that moment on 从那一刻起→fromthen on从那时起→from now on从现在起
9.in turn轮流→ by turns轮流地；依次地 →take turns to do...轮流做……→turn out 结果是……
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.
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.
10.react with 与……发生反应→react to (人) 对……作出反应
Ⅲ.典型句式运用
1.Two-thirds of the earth’s surface is water. 地球表面的三分之二是水。 考点提炼 考查分数的表达法和主谓一致 句子仿造 这里三分之一的书是属于他的。 One third of the books here belong to him.
归纳拓展 conclusion作“结束，结尾”讲时常用单数，用 作“结论”讲时为可数名词，用作“协议，缔结” 讲时为不可数名词。 come to/arrive at/reach/draw a conclusion得 出结论 bring...to a conclusion使……结束 in conclusion最后 conclude v.结束；断定;订立 conclude with以……而结束 conclude sth.from sth.从某事中得出某个结论 conclude sth.(with) sb.与某人达成(协定)
7.They carry logs by floating(漂) them down the river.
8.The professor is giving a series of lectures (讲座) on molecular biology.
9.This drink is a mixture(混合物) of three different sorts,so it has several tastes.
5.Below is a description of a simple scientific experiment. 下面是对一个简单的科学实验的描述。 考点提炼 考查倒装句式 句子仿造 我们靠天吃饭的日子一去不复返了。 Gone are the days when we had to be at the mercy of the weather.
2.This is a 5 star hotel with perfect facilities(设备).
3.The new taxes came as a shock to ordinary (普通的) Americans.
4.The population of the town expanded (膨胀) rapidly in the 1960s.
归纳拓展 make a contract with 与……签合同 sign a contract签署合同 carry out a contract 履行合同 cancel a contract取消合同 break a contract违反合同 by/on contract按照合同；依约
活学活用
You should read the C carefully before
1. Which of the metals in the table reacts the most with oxygen and water? Potassium, calcium and sodium.
2. What happens when you heat calcium in oxygen? It burns to form an oxide.
观察思考 What conclusion do you draw from the evidence? 你从证据中得到了什么结论？ From what you say I conclude that you are right. 根据你的话我断定你是对的。
The play concluded with the death of the entire cast. 该剧以全体剧中人物之死为结局。 In conclusion,I wish all of you good health and a long life. 最后，我祝大家健康长寿。
5.From these facts we can draw some conclusions (结论) about how the pyramids were built.
6.I think the sudden break of the electricity has something to do with an electrical (电的) fault.
you sign it.
A.contrast
B.contact
C.contract
D.conflict
解析 考查名词词形和词义的辨析。contract合
同；contrast对照，对比；contact联系，接触；
conflict冲突。
2.conclusion n.结论；断定；结束；结局； 协定，协议
2.The earth is forty-nine times larger than the moon. 地球比月球大四十九倍。 考点提炼 考查倍数表达法 句子仿造 新修的路比原来的路宽3倍。 The newly-built road is three times wider than that old one.
导练互动
重点单词 1.contract v.(使)收缩；和……订合同;n. 契
约，合同
When you heat a metal,it contracts. 当你给金属加热时,它会收缩。（回归课本P41）
观察思考 If you ice the metal,it will contract. 如果你冷冻金属，它就会收缩。 We contracted with a shoe factory for 4,000 pairs of shoes. 我们和一家鞋厂签订了一份4 000双鞋的合同。 He made a two-year contract of employment with the firm. 他和那家公司签订了两年的雇用合同。
The stone contains potassium
sodium
calcium
magnesium
The wheel is made of aluminum.
zinc
oxide
Nails are easy to rust in the damp air.
Water boils at 100 °C.
Passage B
Read the passage and fill in the chart.
Iron in dry air
Iron in Iron in air-free ordinary water water
Stage A (starting experiment)
cotton wool
water
10.Try to keep a balance(平衡) between work and relaxation.
Ⅱ.重点短语再现
1.add...to ...给……增加……→add to 使增加 →add up to总计；总共
2.at the bottom of 在……的底部→from the bottom of one’s heart从心底里；由衷地
4.The closer you are,the more you’ll see. 你靠的越近，看到的就越多。 考点提炼 考查The more...,the more...句式 句子仿造 你越是努力，取得的进步就越大。 The harder you study,the more progress you’ll make.
3. It’s hard to think of a world without metals. 很难想像一个没有金属的世界。 考点提炼 考查句式It is+adj.+(for/of sb.)+ to do sth. 句子仿造 把伞忘在出租车上，你真粗心。 It’s careless of you to leave your umbrella in the taxi.
conclusion aim electrical potassium
sodium calcium magnesium
aluminum zinc copper
oxide rust boils
Read the passage again and answer the following questions:
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.
3.be proud of对……感到自豪；骄傲→take pride in以……为自豪
4.be supposed to 理应；被认为是……→I suppose so 我看可以
5.put...in order按顺序摆放……→in order整 齐；条理→out of order次序颠倒
6.think of 考虑；想到→think up 想出(主意 等)→think over 仔细考虑→think twice 再 三考虑；慎重思考
Homework
1.Learn the new words and important sentences by heart. 2. Read Passage A and B and try to
retell it.
基础落实
Ⅰ.高频单词思忆
1.We climbed out of the hole,right in front of two astonished (惊讶的) poliቤተ መጻሕፍቲ ባይዱemen.