(共36张PPT)
外研版
高一年级 (必修1)
Module 5
Grammar
1）原级比较：表示两者程度相同。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。 如：
Dick is as tall as his brother.
Tom speaks as quickly as his cousin.
I have never seen a person as / so clever as he is.
一.形容词和副词比较等级的用法
2）比较级：
A. 表示A超过B。此时使用形容词和副词的比较等级。如：
Our classroom is brighter than yours.
Dogs run faster than rabbits.
I don’t think math is more important than physics.
B. 表示A不如B。 用句型：less+形容词/副词的原级表示。如：
Rabbits ran less fast than dogs.
Jenny is less clever than her sister.
It rains less often here in autumn than in spring.
3）形容词和副词比较级的特殊用法
A. 越来越…… 如：
You are growing taller and taller.
你越长越高了。
English is becoming more and more important.
英语越来越重要了。
B. 越……， 越…… 如：
The harder you push, the more quickly that cart will move.
你越使劲推，车就越跑的快。
The more careful you are, the better you will do in the exam.
你越小心，就会考得越好。
The more you practice, the more fluently you will speak.
你练得越多，讲得就越流利。
C. 表示两者之中比较……的一个，用 of 引导，比较级前加上the。 如：
Jack is the taller of the two brothers.
杰克是兄弟两中较高的一个。
This is the bigger of the two rooms.
这个房间是两个中较大的一个。
D. no more than表示“只；不超过；不多于”，相当于only。如：
His whole school added up to no more than one year.
他所接受的学校教育不过一年。
She has no more than one yuan in her pocket.
她兜里只有一块钱。
E. no more…than 表示“……一样不……”；而not more…than则表示“不像……那样”，相当于“not so …as”。如：
Hs is feeling no better than yesterday.
他觉得不比昨天好多少。
She is not more generous than her younger sister.
她不如她妹妹那样慷慨大方。
She is not so generous as her younger sister.
相当于：
F. no less than表示“多达， ……那样多; 至少, 起码”, 相当于as much /many as, 蕴含这个数是大的；而not less than表示“不少于”, 不强调这个数的大小, 只说明数据本身。如：
I have no less than ten dictionaries.
我起码有10本字典。
蕴含“我的词典多”
I have not less than ten dictionaries.
我具有的词典不少于10本。
不含“我的词典多”的意思，只说明一个事实。
G. no less …than表示“不比……差；与……同样地”， 相当于“as …as”。 如：
She is no less beautiful than her sister.
H. 不用比较级的形容词如：senior, junior, superior, inferior等。如：
He is three years senior to me.
他比我大三岁。
Your knowledge of electronics is much superior to mine.
你对电子学的知识远远超过我。
I. 比较级的修饰语。这些修饰语通常为副词或短语，置于比较级前面， 说明比较级的程度。这些词有：a little, little, a bit, bit, a lot, a great deal, much, far, rather, slightly, by far, even, still, nearly, almost, any, just, (…)times等。如：
The moon is much smaller than the earth.
The result of the experiment turned out to be even better than expected.
Speak a bit more slowly, please.
The output of the paper mill is three times higher than it was last year.
1. Ten years ago the population of our village was _____ that of theirs. (陕西2008)
A. as twice large as B. twice as large as
C. twice as much as D. as twice much as
【高考题展示】
2. At a rough estimate, Nigeria is _____ Great Britain. (上海2005)
A. three times the size as B. the size three times of
C. three times as the size of D. three times the size of
3. In recent years travel companies have succeeded in selling us the idea that the further we go, _____.
(上海2001)
A. our holiday will be better
B. our holiday will be the better
C. the better our holiday will be
D. the better will our holiday be
4. Of the two sisters, Betty is _____ one, and she is also the one who loves to be quiet. (安徽2006)
A. a younger B. a youngest
C. the younger D. the youngest
5. You’re driving too fast. Can you drive _____ (2008全国卷I)
A. more slowly a bit
B. slowly a bit more
C. a bit more slowly
D. slowly more bit
6. Your story is perfect; I’ve never heard _____ before. (2006全国卷II)
A. the better one B. the best one
C. a better one D. a good one
7. I have worked with him for some time and have found that he is _____ than John. (上海2004春)
A. more efficiently a worker
B. a more efficient worker
C. more an efficient worker
D. a worker more efficiently
8. Our neighbor has _____ ours. (北京2003)
A. as a big house as
B. as big a house as
C. the same big house as
D. a house the same big as
9. John is the tallest boy in the class, _____ according to himself. (安徽2005)
A. five foot eight as tall as
B. as tall as five foot eight
C. as five foot eight tall as
D. as tall five foot eight as
10. —Shall I give you a ride as you live so far away
—Thank you. _____. (江西2005)
A. It couldn’t be better
B. Of course you can
C. If you like
D. It’s up to you
11. —Did you take enough money with you
—No, I needed ___ I thought I would.
(2006全国卷II)
A. not so much as B. as much as
C. much more than D. much less than
Discuss in groups of three. Make sentences about the comparative sizes of the pairs. Use the words in the brackets.
Winter in Harbin
Winter in Beijing
-20℃
-5℃
(cold/coldness)
Mount Tai
Mount Qumolangma
1521m
8848m
(high/height)
Diameter (直径）
Earth=1 Jupiter=11
(big/size)
Example:
A: The Yangtze River is about three
times as long as the Songhua River.
B: The Yangtze River is about three
times longer than the Songhua River.
C: The Yangtze River is about three
times the length of the Songhua River.
Practice Complete the sentences according to the chart.
Mars is ____________ the earth. (big)
Jupiter is _______________ from the sun than the earth. (far)
Earth Mars Jupiter
Diameter(直径) 1 0.5 11
Distance from the sun 1 1.5 5
half as big as
five times further
Study the sentences and make a conclusion of the comparative structure of adjectives.
The brown house’s windows are twice as wide as those of the white house.
My handwriting is not half as good as yours.
This room is three times as large as that one.
小结: (1) 倍数＋as＋形容词＋as…
The white box is four times deeper than the black box.
This road is twice longer than that one.
The plane flew nine times higher than the kite.
小结: (2) 倍数＋形容词的比较级＋than…
The red building is twice the height of the grey building.
Our school is three times the size of yours.
The street is four times the length of that one.
小结:
(3) 倍数＋the size (length, width, height, depth) ＋of…
②倍数+形容词比较级+than …
③倍数+the (size, height, length, weight, width, depth, age) +of …
①倍数（half, once, twice, …times）
+as+形容词+as(共30张PPT)
外研版
高一年级 (必修1)
Module 5
Language points
1. When we use metals, it is important to
know how they react with different
substances, …
react with 意为“对……起反应”。如：
Iron reacts with water and air to produce rust.
铁与水和空气起化学反应而生锈。
此外，react还可以同其他介词搭配, 表示不同的意思。如：
react on sth 对某事物有影响；使某事物产生变化。如：
How do acids react on metals
酸对金属起什么反应？
react against 反对；反抗 如：
Will the people ever react against the dictator
有朝一日人民会起来反抗这个独裁者吗？
2. The reaction of metals with these
substances can be put in order.
in order意为“井然有序的；整理好
的” 。如：
She keeps the room in order.
她把房间整理得很好。
I put my room in order.
我把自己的房间整理好。
此外，in order还有“依照次序; (机器等）情况良好”的意思。如：
Call the names in order.
请依照次序叫名字。
My bicycle is in order.
我的自行车情况良好。
含有order的其他短语：
in order for …to do 以便……能……
in short order 很快地
on order 已订购
on the order of 与……相似的；（数量等）约……的
out of order 不整齐的；杂乱的；出毛
病；顺序紊乱
to order 定做的 如：
He spoke slowly in order for everybody to understand him.
他讲得很慢以便每个人都能听懂他的话。
The book is on order.
那本书已订购。
Everything was out of order in the classroom. 教室里乱七八糟。
His liver is out of order.
他的肝脏出了毛病。
3. Add some oil to the water.
【考点】 add及其短语辨析。add ... to ... 把……添加到……上；add to增加，增添；add up to总共有，意味着。
【考例1】 That’s all I have to say. Is there anything that you’d like to _____, Terry (2008四川延考卷)
A. talk B. require
C. add D. deliver
【点拨】 分析该句后一句可知横线处所填动词的宾语是anything，而talk意为“讲话，交谈，谈论”时为不及物动词，故不选；require需要，要求，不符合句意；deliver发言，发表（演说），与语境不符；add补充说。根据前一分句句意“我要讲的就这么多。”可知询问Terry有什么想补充的。
【考例2】
各色太阳伞给夏日的街头平添了活泼的气氛。(add to) (上海2007)
【点拨】 add to增添。在这句话中作谓语。答案为：Colorful umbrellas add to a lively atmosphere in the summer streets.
【考例3】 The engine of the ship was out of order and the bad weather _____ the helplessness of the crew at sea.(上海2003)
A. added to B. resulted from
C. turned out D. made up
【点拨】
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。
【考例4】
There have been several new events _____ to the program for the 2008 Beijing Olympic Games. (北京2006)
A. add B. to add
C. adding D. added
【点拨】
add ... to ... 把……添加到……上，本题中应为add several new events to ...，故several new events与add之间是被动关系，因此要用add的-ed形式作定语。
4. 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”。如：
Keep that dog out of my study.
别让那条狗进我的书房。
She wore a hat to keep the sun out of her eyes.
她戴着帽子摭阳, 保护眼睛。
类似的：
keep out (of sth.)不进入某处；留在外边
keep up with sb. 保持与某人的联系
keep up with sth. 知悉(消息);跟上 （形势）
keep up (with sb./sth.) 跟上某人/某事物
keep off 不接近或不接触某人/某事物
5. Iron does not rust in air-free water.
air-free为形容词，意为“没有空气的”。
-free用以构成形容词或副词，意为“无，免除”。类似的：
carefree adj. 无忧无虑的; 无牵挂的; 轻松愉快的
duty-free adj. & adv. 免税的
disease-free adj. 无病的
worry-free adj. 无忧无愁的
6. Half-fill a test tube with water…
fill …with 意为“使……满；填满”。
He filled the bottle with water.
他把瓶子装满水。
Her eyes were filled with tears.
她热泪盈眶。
The result filled his heart with despair.
这样的结果使他心中充满失望。
7. Leave the tube for one week.
leave意为“放置, 不去动某物, 使……
处于某种状态” 。如：
Leave the child as he is.
这孩子随他去，别去惹他。
Who left the lights on 谁没开灯？
Leave a basin of water outside in the freezing weather, and it will soon freeze.
在极冷的天把一盆水放在室外, 水很快会结冰。
Exercise
1. 在图书馆，图书通常是按作者姓氏的第一个字母顺序排列的。
In the library, books are usually put in the order of the first letter of the writers’ surname.
2. 他桌子上的书摆放整齐有序。
The books on his desk are in order (orderly).
I. 将下列句子翻译成英语。
3. 请按照正确的顺序将下列单词排列。
Please put the following words in the correct order.
4. 我们这次是按照年龄顺序而不是按照身高站队。
This time we stood in line in the order of age instead of in the order of height.
II. 根据括号内所给汉语提示完成下列句子，每空一词。
1. ___ ____ __ ______ (很难想象) what a world without electricity is like.
2. We ____ __ ___ _________ (得出这个结论) that he’d been lying.
3. Don’t ____ __ (混合) the two kinds of vegetable seeds. They are much alike.
It’s hard to imagine
came to the conclusion
mix up
4. ___________________________ (目的是……的一个实验) finding out how copper _____ _____ (反应) water will be done next lesson.
5. The _________________________(生锈的电器) can’t work any more.
An experiment with the aim of
reacts with
rusting electrical equipment
6. I helped him _____ ___ __ ___ _______ (在秤上称鱼) in the store.
7. I’ve just finished mopping the floor. _____ the dog ___ __ (别让……进入) the room！
8. _____________ __ ___ ____ ____ (四分之三的水) drunk by the dog.
weigh fish on the balance
Keep
out of
Three-quarters of the water was
III. 从方框内选择合适的词或短语并用其正确形式完成下列句子。
add, add ... to ..., add to, add up to
1. The beauty of the river ______ the attraction of the place.
2. I want to know whether my name ____________________ the list.
adds to
was / has been added to
3. —What is the cost of the project
—The total number _________ 270 million yuan.
4. If the mixture seems dry, _____ water.
adds up to
add
Finish the exercises on grammar on page 43 and page 47.
Homework(共13张PPT)
外研版
高一年级 (必修1)
Module 5
如何写英文实验报告
【案例呈现】
按照下列说明写一篇英文实验报告。
实验目的：探究噪音是否会对植物产生影响。
实验用品：若干盆同种植物，长势相同。
实验方法：将该同类植物分成A组和B组，提供给它们相同的生长环境，但是每天都给B组“听”90分贝的噪音，观察A组和B组植物的生长情况。
实验结果：数天后，B组植物渐渐枯萎，而A组的依然正常生长。
实验结论：噪音会对植物的生长造
成危害。
注意：
1. 词数：100左右；
2. 参考词汇：盆 pot；分贝 decibel；枯萎wither。
【写作指导】
●审题定调：实验报告属于说明文体裁，其最大特点就是知识性和科学性。它是对客观事实的阐述，措辞严谨真实，准确恰当。时态主要为一般现在时态；人称一般用第二人称。
●布局谋篇： 全文分三段式（题目可省略）
第一段：说明实验的目的和所需要的实验用品。
第二段：实验的方法或实验的过程。
第三段：实验的结果和结论。
●常用表达:
1. 描写实验目的: in order to find; The aim of the experiment is to find; with the purpose of discovering; do research on; in the hope of ...
2. 描写实验用品: To carry out / make / do / perform the experiment, you should need some pots of flowers and ...; The following things are needed; When all the things are ready, you can begin the experiment.
3. 描写实验方法或过程：make good preparations for; It is important that; do the experiment as follows; firstly; secondly; thirdly; finally; first; then; next; after that; two hours’ later; after several days; find a better way of doing; be under observation; make a good study of ...
4. 描写实验结论：from this experiment we can conclude; in conclusion; draw a conclusion that; We can learn from the experiment ...; We can find out that ...; You can see / discover ...
5. 描写原因和结果：The reason is that ...; This is because ...; result from / in; lead to; cause ...
【范文欣赏】
The aim of the experiment is to discover whether noise does harm to the plants. To carry out the experiment, you need some pots of the same kind of plants, whose growing situation is the same.
First, divide the plants into two groups: Group A and Group B. Then put them in the same growing environment. But let Group B listen to some noise which reaches 90 decibels. Next, observe how the plants grow in the following days.
After several days’ observation, you can find the plants of Group B wither gradually while the plants of Group A grow normally. From this experiment we can conclude that noise can do great harm to the growth of the plants.(共37张PPT)
外研版
高一年级 (必修1)
Module 5
Reading
tongs
crucible
dissolve
solid/liquid/gas
balance
Bunsen burner
test tube
B
B. aim
D. method
A. result
C. conclusion
D
A
C
The steps of a scientific experiment
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
Passage A
The Reaction of Metals
Aim:
Apparatus:
Methods:
Result:
Conclusion:
How different metals react with water and oxygen.
(1) Heated in oxygen
(2) put into water or steam
Metals Heated in oxygen Reaction with water or steam
Potassium
Burn to form an oxide Reacting with cold water
Sodium
Calcium
Magnesium
Reacting with steam
Aluminium
Zinc
Iron Reacts slowly Partial reaction
Copper Partial reaction No reaction
The Reaction of Metals
Read the passage again and answer the following questions:
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.
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.
Complete the passage with proper words according to passage A.
Metals are very important, so when using them we should know how they _____ with different substances. Take iron used in ________ equipment for example, when ______ in oxygen, it will react slowly. When it is put together with water or _____, there will be a partial _______.
reaction
react
electrical
heated
steam
Read the passage and fill in the chart.
Passage B
Iron in dry air Iron in air-free water Iron in ordinary water
Stage A
(starting experiment)
cotton
wool
water
water
Stage B
(1 week later)
Stage C
(Result)
nails
water
Iron does
not rust
Iron does
not rust
Iron rusts
1. In the first part of the experiment, the ___ is dry, not wet.
2. It shows that iron ___________ when the air is dry.
3. In the second part of the experiment, you must ____ the water to make sure there is no ____ in it.
air
does not rust
boil
air
Read the passage again and complete the sentences.
4. You add _________ to the water because this keeps ____ out of it.
5. It shows that ____ does not rust in water that has no ____ in it.
some oil
air
nail
air
1. “Where do we go from here ” means ______. A. What shall we do next B. Is this the right way
2. “Keep the noise down” means____.
A. Don’t talk B. Talk quietly
Choose the correct meaning.
3. “You’ve got it” means ________. A. You’ve understood B. You have something
4. “Go ahead!” means ________! A. Go away B. Begin
5. “It’s your turn” means _______. A. You’re next B. Turn round
Complete the passage with proper words according to Passage A and B.
It is hard to think of a world without metals. Different metals have different uses, for example, iron can be used in ________ equipment. But above all we should know whether it will ____ under
electrical
react
different conditions. Otherwise it will keep the equipment from working well. As we all know, if iron is heated in oxygen, it will react slowly but will not form an _____.
oxide
On the other hand, if it is put together with water or _____, there will be a ______ reaction. Next let’s do an __________ to support the above. First, get a test tube filled with water and put it over the _____________ to ___ for three minutes.
steam
partial
experiment
Bunsen burner
boil
Then put three or four clean nails in the water with some oil added to it and leave the tube for one week. What happens The iron does not ____ in air-free water. Another experiment, if you put the nails in the tube with the air in it for one week, then what happens Iron rusts in _______ water.
rust
ordinary
1. When we use metals, it is important to know how they react with different substances, for example, water and oxygen.
= When we use metals, we should know how metals react with different substances, for example, water and oxygen, which is very important.
本句是一个复合句，其中when引导时间状语从句；在主句中，it为形式主语，真正的主语是动词不定式短语to know ... substances，其中how ... substances为how引导的宾语从句，作know的宾语， for example引出同位语，表示举例。
2. Here is a table with the metals that react most at the top, and the metals that react least at the bottom.
= A table is here. At the top of the table we can see the metals that react most and at the bottom of the table we can see metals that react least.
本句使用了倒装语序。句子的主语是a table，后面的with ... bottom作定语修饰a table；两个that都引导定语从句修饰the metals。
句意: 这里有一个表格，反应最强烈的金属在最上面, 反应最弱的在最下面。
Read about an incident during a chemistry lesson and choose the best summary.
Reading on P93
A student didn’t follow the instructions carefully. He took the wrong liquid from the cupboard and nearly poisoned the class.
2.The chemistry teacher was demonstrating an experiment when she heated a poisonous liquid. There was so much smoke that the students had to leave the room.
3. A student was doing a chemistry experiment when he accidentally heated the wrong liquid and caused an incident in the laboratory.
Read the passage again and answer the questions:
1. What substances were they using
Baking soda and hydrochloric acid.
2. What substances were the students making
Salt.
3. How can they make the reaction quicker
By making the mixture hotter.
4. What mistakes did Paul make
He used the wrong liquid.
5. Why did he make the mistake
Because there was no label on the bottle.
6. What happened when Paul heated the liquid
It formed a thick cloud of white gas.
7. Why did the teacher send the students out of the room
Because the liquid was acrylamide and the gas was poisonous.
8. What lesson did the incident teach the students and the teacher
Never to leave a bottle without a label in the chemistry lab.
Learn the new words by heart.
Read Passage A and B and try to retell it.(共30张PPT)
外研版
高一年级 (必修1)
Module 5
Vocabulary and speaking
英语中基数词、序数词、分数、小数和百分数的读法
1. 基数词的读法：
A. 先说“几十”， 再说“几”，中间用连字符。如：
23— 89—
B. 先说“几百”， 再加and,再加末两位数（或末位数）。如：
223—
416—
809—
twenty-three
eighty-nine
two hundred and twenty-three
four hundred and sixteen
eight hundred and nine
C. 1000以上的数先从后向前数，每三位数加一“,”（千分位）；第一个“,”号前为thousand; 第二个“,”号前为million; 第三个“,”号前为billion。如：
1,001—
4,000—
9,743—
174,301—
750,000,000—
one thousand and one
four thousand
nine thousand, seven hundred and forty-three
a (one) hundred and seventy-four thousand, three hundred and one
seven hundred and fifty million
2. 序数词的读法
序数词一般以与之相应的基数词加词尾-th构成，如：tenth（第十），但下面这些基数词在变序数词时， 有特别的地方。如：
A. one — two —
three— five—
eight — nine—
twelve—
first
second
third
fifth
eighth
ninth
twelfth
B. 以-ty结尾的词，要先变-y为-i，再加-eth。如：
twenty— forty—
C. 以one, two, three, five, nine收尾的多位数词，要照第一条方法变。如：
twenty-one—
twenty-two —
thirty-five —
ninety-nine—
a hundred and fifty-three —
twentieth
fortieth
twenty-first
twenty-second
thirty-fifth
ninety-ninth
a hundred and fifty-third
基数词表示分子，序数词表示分母，除了分子是“1”的情况外，序数词要用复数。如：
— 2/3—
7/9— 5/12—
—
—
one-fourth
two-thirds
seven-ninths
five-twelfths
two and three-fifths
thirty and seven-eighths
3. 分数词的读法
2
3
5
30
7
8
一些特殊的表达法
—
—
—
a / one half
a / one quarter
three quarters
4. 小数的读法
7.8—
0.4—
0.03—
0.125—
14.397—
seven point eight
zero point four
zero point zero three
zero point one two five
fourteen point three nine seven
5. 百分数的读法
27% —
45% —
86% —
twenty-seven percent
forty-five percent
eighty-six percent
Can you say the following in English correctly
1,000
2,000
12,000
112,000
796,000
one thousand
two thousand
twelve thousand
one hundred, twelve thousand
seven hundred, ninety-six thousand
879,457
eight hundred, seventy-nine thousand, four hundred and fifty-seven
1,000,000
9,000,000
32,000,000
212,000,000
one million
nine million
thirty-two million
two hundred, twelve million
988,766,688
nine hundred, eighty-eight million, seven hundred, sixty-six thousand, six hundred and eighty-eight
987,654,321
nine hundred, eighty-seven million, six hundred, fifty-four thousand, three hundred and twenty-one
1,000,000,000
one billion
9,000,000,000
nine billion
32,000,000,000
thirty-two billion
564,865,000,000
five hundred, sixty-four billion, eight hundred, sixty-five million
978,876,675,467
nine hundred, seventy-eight billion, eight hundred, seventy-six million, six hundred, seventy-five thousand, four hundred and sixty-seven
Let’s have a match to see who can say the following numbers correctly and quickly.
765,847
seven hundred, sixty-five thousand, eight hundred and forty-seven
Practice
2. 756,980,000
seven hundred, fifty-six million, nine hundred and eighty thousand
3. 345,567,887,987
three hundred, forty-five billion, five hundred, sixty-seven million, eight hundred, eighty-seven thousand, nine hundred and eighty-seven
4. 897,786,000,576
eight hundred, ninety-seven billion, seven hundred, eighty-six million, five hundred and seventy-six
5. 786,087,670,756
seven hundred, eighty-six billion, eighty-seven million, six hundred, seventy thousand, seven hundred and fifty-six
6. 987,765,654,345
nine hundred, eighty-seven billion, seven hundred, sixty-five million, six hundred, fifty-four thousand, three hundred and forty-five
Read these questions aloud and say the answers.
What is of 6,000,000
2. How much is 35,246,000 plus 12,800,000
3. What is 25% of 200,000,000
three million
forty-eight million, forty-six thousand
fifty million
4. How much is 260,408,396 and 5,284,700
two hundred, sixty-five million, six hundred, ninety-three thousand, ninety-six
5. What is of 1,000,500,000
seven hundred, fifty million, three hundred, seventy-five thousand
6. What is 10% of 800,000,000
eighty million
1/5
1/6
1/7
4/7
one fifth
one sixth
one seventh
four sevenths
Can you say the following in English correctly
7/10
97/111
seven tenths
ninety-seven one hundred and elevenths
forty-five eighty-sevenths
总结: 你能看出他们有什么特点吗？
45/87
分子用基数词,分母用序数词;分子大于1,分母的序数词需要加s。
另外, 还有几个特殊表达的情况:
1/2
1/4
1/3
3/4
2/3
one half
one quarter
one third
three quarters
two thirds
Now let’s say: 2/5 5/8 9/10 3/8 5/6
Practice
two-fifths
five-eighths
nine-tenths
three-eighths
five-sixths
Can you say the following in English correctly
0.5
0.8
0.76
1.23
point five
point eight
point seven six
one point two three
23.45
100.32
87.675
7.564
twenty-three point four five
one hundred point three two
eighty-seven point six seven
seven point five six four
Finish Exercise 9 on P93.
Homework(共19张PPT)
外研版
高一年级 (必修1)
Module 5
Thomas Edison
What subjects are you interested in
Are you always interested in it/them
How did you become interested in
it/them
Why are you interested in it/them
What do you think of this subject
Lead-in
1. Why has Mark become more interested in science
2. Do you enjoy studying science Explain why or why not.
Read the passage and answer the questions:
Because he has moved to a new school with good facilities and teachers.
Fill the form
feeling about science
last year
science facilities
chemistry teacher
the fact
Nobel prize
I ___________
my parents
changed, never used to
changed school, excellent
good, lab, latest, equipment
takes, lectures, interesting
first-class , won
highest, proud
becoming,want to, going,
astonished, thought
Task: work in pairs to retell the passage.
A is Mark Kendon.
B is a Chinese student who studies
aboard.
For example:
B: What’s your feeling about science
A: My feeling about science have changed.
Explanation
1. The science facilities are very good, with laboratories that have all the latest equipment.
这些科研设备非常好，实验室配有最新的设备。
with在此句中意为“带有……”, 其引导的短语对句子作附加说明。
that have all the latest equipment 为定语从句, 修饰laboratories.
2. The fact is, Canada has many first-class scientists.
事实是加拿大有许多一流的科学家。
first-class为形容词, 意为“第一流; 最好的; 最优秀的”。如：
They can afford to eat at first-class restaurants.
She got first-class results in her exams.
3. The Nobel Prize is the highest prize there is, so we should be very proud of that.
诺贝尔奖是目前科学方面的最高奖, 因此我们感到骄傲。
there is为定语从句, 在句中修饰prize; be proud of 意为“为……感到骄傲”, 后跟名词、代词或动词的-ing形式。如：
She is very proud of her son.
她以她的儿子为荣。
He is proud of having studied in Paris.
他以曾在巴黎读过书为荣。
此外，be proud后还能跟that从句和动词不定式。如：
He is proud that he is a teacher.
他以当老师为荣。
I am proud to say that you are my student.
我以有你这学生为荣。
4. …, as both are supposed to have good physics Departments.
因为两个(大学)都有不错的物理系。
be supposed to do 意为“被期望或被要求(按惯例、规则) 做某事”。如：
You are supposed to pay the bill by Friday.
你最晚在星期五结清这笔帐。
口语中意为“获准做某事”。如：
You are not supposed to play football in the classroom.
在教室里是不准踢足球的。
Write a report on a simple scientific experiment using these headings:
Aim, Equipment, Method, Result, Conclusion
Homework(共30张PPT)
外研版
高一年级 (必修1)
Module 5
tongs
crucible
dissolve
solid/liquid/gas
balance
Bunsen burner
test tube
1. (a) Water exists as a solid, a liquid and 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.
Guess, listen and check the answer.
Listening
3. (a) Steel is a mixture of iron and other substances.
(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.
5. (a) The distance of the sun from the earth is 25,5000 kilometres.
(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.
7. (a) The earth is twice as large as the moon.
(b) The earth is forty-nine times larger than the moon.
Put the words in pairs or groups.
contract air earth gas liquid
oxygen moon solid expand sun
1
2
3
4
air – gas - oxygen
contract - expand
earth – sun - moon
gas – liquid - solid
1. liquid: 液体
2. expand: vi. 使......膨胀
Metals expand when they are heated.
3. contract vi. 收缩
Metals contract as they get cooler.
4. substance n. 物质
5. mixture n. 混合物
6. oxygen 氧气
7. electricity n.电
Answer the questions.
Which of the above are natural
Electricity, iron, some metals and air are natural.
2. Which are man-made
Steel, some metals and glass are man-made.
electricity iron metal steel air glass
3. Which can be both
Electricity and some metals (alloys for example) can be man-made and occur naturally.
Listening and writing
You will hear a conversation in which a teacher helps a student do an experiment. Read the Aim below and predict the Result.
Aim: To find out if there is a change in
weight when the metal magnesium
burns in air.
Result:__________________________.
Aim: ____________________________ ____________________________ ____________
To find out if there’s a change in weight when magnesium burns in air.
Listen and complete the description of the scientific experiment.
Apparatus: _________________________ ___________________
Method: ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ _______________________
Magnesium, Bunsen burner, a balance, a crucible.
First, put the magnesium in the crucible. Then put the crucible on the balance and weigh it. Next, heat the magnesium. Light the Bunsen burner and hole the crucible over it. Finally weigh the magnesium again.
Result: _____________________________
Conclusion: ________________________ ________________________ ____
It weighs a little more than before.
There is a change in weight when magnesium burns in air.
1. “Where do we go from here ” means ______. A. What shall we do next B. Is this the right way
2. “Keep the noise down” means____.
A. Don’t talk B. Talk quietly
Choose the correct meaning.
3. “You’ve got it” means ________. A. You’ve understood B. You have something
4. “Go ahead!” means ________! A. Go away B. Begin
5. “It’s your turn” means _______. A. You’re next B. Turn round
Decide what the aim of the experiment is.
Listening and speaking on Page 95
The aim is to write a secret message.
Put the stages in the correct order.
1.
2.
3.
4.
b squeeze lemon and pour the juice into a container
f dip your pen into the juice
a write your message on a piece of paper
g blow on the paper to dry the lemon juice
5. e light a candle
6. c heat the paper in the candle flame
7. d the message appears when the
juice reacts with oxygen and
produces brown oxide
Homework
Preview Vocabulary on Page 46.
