课件23张PPT。Unit 5 Look into ScienceLesson 25 Let's Do an Experiment1. Do you like science?2. What kinds of experiments have you done in science class? 3. If you hold a jar that is filled with water upside down, what will happen?upside downa?a?倒置的，颠倒的right side upa?正面朝上upside a?上边，上部sciencea?科学adj.scientifica???do an experiment?做实验What can they do?jarɑ:广口瓶，罐子fill?装满How many strawberries?observe?：观察，监视What's he doing?ingprove 证实; 证明
method 方法; 办法Listen to the tape and answer the questions:1. What will Brain do?
2. Why does Danny say they should do this experiment outside? Brain will do an experimentBecause Danny thinks the floor will get wet. I think…:“我认为……”,其后可接that引导的宾语从句。在使用时要注意，否定主句,反问从句。
get wet意为“变湿”。后接形容词作表语。
pour out：“倒出,使流出,涌出”。 pour…into…：“把……倒进……”。
be sure of：“确信；对……有把握”
put on：“穿上”,为“动词+副词”构成的短语。
“It is+形容词+enough to do sth.”“做某事是足够……的”。
=too…to…
=so…that…。
conclude from意为“从……推断,从……中得出”。
find, find out, discover, invent
(1)find意为“找到,发现”,强调“找”的结果,也可指偶然发现、碰到,其后可接名词、复合结构或that从句。
(2)find out指“弄清楚,查明”。着重表示通过调查、分析、思考等得出结果。
(3)discover意为“发现”,指发现已存在但不为人所知的事物。
(4)invent意为“发明”,指发明原来不存在的东西。
(1)Where does Danny think they should do the experiment?
(2)What keeps the water in the jar?
(3)Is Jenny sure of her theory?How do you know?
(4)Why does Danny put on his raincoat?
(5)What does Danny conclude?Read the lesson and answer the questions.Danny thinks that they should do the experiment outside.The force of the air./The air pressure.Yes,she is.She is so sure of her theory that Brian can do the experiment over Danny’s head and he won’t get wet.Because he thinks he will get wet.Air is stronger than he thought. Put a piece of cardboard over the jar.
The jar of water is upside down, but the water stays in the jar. This is because air pressure pushes the cardboard onto the jar.
Fill the glass jar with water.
Turn the glass jar over quickly. Hold your hand on the cardboard for a few seconds.
Remove your hand from underneath the jar. What happens?
There is more air outside the jar than inside, so there is more air pressure outside than inside. Read the experiment.Put the sentence in the correct order.251346What happens when you use less water, more water, wet cardboard, or different kinds and sizes of jars?Try to do the experiment in this lesson yourself.1. Make a list of the materials and tools that we will use in the experiment.2. Write down two different theories. Retell the process of the experiment.3. Write down the steps of doing the experiment.4. Write down the result of the experiment. Summary the experiment.How do we do the experiment?
Let’s do an interesting experiment. First, I ___ a jar ___ a desk, ___ it ____ water, then _____the top ____ a piece of cardboard. When I ____the jar ______ _____, can you guess what will happen? downputonfillwithcoverwithturnupsideWhat is science?
What is science?
Can you explain?
Please make it easy for my brain.
It’s about making observations.
Why do onions make me cry?
Why do clouds go by?
What keeps the birds in the sky?
That’s just science.
It’s about matter—the universe.
Why does a car stay on the road?
Why is there green all over a toad?
Why can’t I carry a heavy load?
That’s just science.1.Listen and read.
2.Finish exercises of this lesson.
Homework课件19张PPT。Unit 5 Look into ScienceLesson 26 Keep the Candle BurningThink about it!
Do you think science is interesting? Why or why not?
2. Name one or two famous Chinese scientists. What do you know about them?Let's do another experiment.Keep the Candle Burning. What do we need?a candle?蜡烛a big glass jar玻璃罐子a candleholder烛台a shallow dish with water??浅的?matches火柴?a match一根火柴How do we do the experiment?
Let's read the text and fill in the blanks.Let’s do the experiment together! Put the candle in the candle holder. Put the candle holder on the dish. Fill the dish half full with water. Light the candle with a or a lighter. What can you see? The candle is burning. __ the candle burn for two or three minutes. Then carefully put the jar _over it until the top of the jar rests on the dish. As the candle burns, it the oxygen in the air. When the candle stops , it has used up all the oxygen in the air. The water inside the jar and fills about of the jar. This is because about one fifth of the air is made up of oxygen. matchLetburningrisesWhat is happening?1) 分数由分子和分母两部分构成。用英语表达时，分子用基数词，分母用序数词。
2) 如果分子为1，则分母的序数词是单数形式，如果分子大于1，则分母的序数词用复数形式。
? ＝ one (a) half 或 one second (one-second)
? = one (a)quarter 或 one-quarterHow to express the fractions:口 诀:
分子基，分母序。分子﹥1 ，分母加s 。二分之一
三分之一
四分之一
四分之三
五分之二
十分之九a/one half (one second)
one-third
one quarter
three-fourths three quarters
two-fifths
nine-tenths1. Practice the text in groups.
2. Finish the exercise on page 69.Do the experiment what you want in groups.
Read about the experiment in this lesson.With a group of classmates,practice the experiment.Do your experiment in front of the class.Don’t forget the following things:
First,describe your experiment.
Second,ask the class what they think will happen.
Third,do the experiment.
Finally,ask the class if the result is what they expected.Write the progress in the experiment.1.Listen and read.
2.Finish exercises of this lesson.
Homework课件22张PPT。Unit 5 Look into ScienceLesson 27 Plant DannyThink about it!
1. Do you like science? Why or why not?
2. Do you know any of the planets in the solar system?行星?太阳的??How to see solar system?telescopese望远镜??What do they do?What do they see?What does the solar system include? The earth, the sun and the moon all belong to the solar system. Our solar system is in a galaxy called the Milky Way. The Milky Way has more than five hundred billion srats. Scientist say the universe contains billions of galaxies.Do you think there is life on other planets? Let's see! telescope n.
solar adj.
certainly adv.
unless conj.
double n. & adj.
mystery n.
望远镜
太阳的
当然
除非
两倍&双倍的
谜Listen to the dialogue and tick the correct answers.
(1)What did Danny do last night?
He tried to study the moon.
He tried to find a new planet.
(2)What did Danny use?
A telescope.
A book.
(3)What did Danny need?
More sleep.
More stars.√√√外语教学与研究出版社 九年级 | 全一册 arrive意为“到达,来到”，为不及物动词,后接表地点的名词时,需使用介词in或at。in用于指较大的地点,at则指比较具体的小地点。arrive at/in=get to/reach外语教学与研究出版社 九年级 | 全一册 He said that I could use his telescope.
本句含有that引导的宾语从句。无论主句是陈述句还是疑问句,宾语从句都应使用陈述语序。含宾语从句的复合句,主从句谓语动词的时态呼应包括以下三点:
(1)如果主句的谓语动词是一般现在时,宾语从句的谓语动词可根据需要,选用相应的时态。
(2)如果主句的谓语动词是一般过去时,宾语从句的谓语动词应用相应的过去时态。
(3)如果宾语从句所表示的是客观事实、普遍真理、自然现象或习惯性动作等,不管主句用什么时态,从句时态都用一般现在时。The usage of through， across and overthough: 表示“穿过、通过”，指从某处或某物中间通过，侧重点是从某空间里面通过。
across: 表示“横过、穿过”，指在某一平面或物体上从一边到另一边去。
over: 表示“越过”，指从某物的上方越过。unless :“除非，如果不”。
unless 引导的条件状语从句常用一般现在时表示将来的意义，主句多用一般将来时。
例句：You will fail unless you study hard.
如果你不努力学习，就会失败。double
作名词或形容词,意为“两倍(的);双重(的)”,
也可作动词,意为“使加倍”worth:“相当……价值,值得”,
用于be worth+n./doing结构。
even if:“即使……”,用来引导让步状语从句。
belong to sb.意为“属于某人”,
=be sb.’s
belong to不能用于进行时态和被动语态。
billions of:“数十亿计的”Read the lesson and write true or false.( )1.Danny is studying the solar system at school.
( )2.Danny is looking through the telescope when Jenny and Brian come to visit.
( )3. During the day, Danny can see many stars in the sky through the telescope.
( )4. Jenny and Brian will come back to Danny’s house because they want to use the telescope.
( )5. Danny has discovered a new planet.TTFTFOn Saturday afternoon, Brian and Jenny visited Danny at his house. When they arrived, Danny was outside looking __ ___a telescope. Brian and Jenny laughed at Danny because he was using the wrong of the telescope. Of course, Danny couldn’t see the during the day. Brian and Jenny also wanted to join Danny. They decided to come back after supper. After the sun went down, they could see the stars. Danny hoped to a new planet. Read the lesson and fill in the blanks.throughendstarsdiscoverGroup work:
1. Practice the dialogue in groups
2. Act it out.What interests you about the solar system?
If you had a chance to go to space, would you go?
Share your ideas with a partner.Let's enjoy some picturesMake a new dialogue with your partner.1.Listen and read.
2.Finish exercises of this lesson.
Homework课件23张PPT。Unit 5 Look into ScienceLesson 28 The Study of Living ThingsThink about it!
1.Would you like to be a biologist when you grow up? Why or why not?
2.What mysteries of nature do you know about?未解之谜[mist?riz]How to see solar system?butterfly??蝴蝶a?What subject are they belong?biology?生物?a??migrateadj迁徙的a?migratinge?What it like?奇异的strange?fantastic??How to see solar system?grandchildren外孙（女）female?雌性e?milkweek马利筋?i:chemicale化学物质?puzzling?令人费解的completely?完全地??completely?蝴蝶复数??small piece of forestleave for
引起某人的注意 回到、返回 多达 下蛋 在大学里
小片的森林
动身去某地 draw one’s attention return to…as many as
lay eggs
at a university have been doing sth.：“一直在做某事”,表示从过去某时开始的某个动作或状态一直延续到现在,而且还在进行。表示动作的延续性、重复性以及感彩等。
draw one’s attention：“吸引某人的注意力”。draw one’s attention to sth.
使某人注意某事pay attention to sth.
注意、留心 give one’s attention to sth.
关心catch one’s attention
引起某人注意 the phrases about attention:as…as… 像......一样 否定形式：not as/so... as...
eg: I do my homework as carefully as my brother does.
我做作业像我哥哥一样认真。spend: 度过,花(钱/时间)”
过去式和过去分词都是spent。
spend time/money(in) doing sth.
花费时间/金钱做某事
spend time/money on sth.
在某物上花费时间/金钱
spend time with sb.
和某人一起度过时光
lay eggs : 产卵
lay的过去式和过去分词都是laying.
cut down: 砍伐
both... and...: ......和...... 用于连接两个并列成分。当它做主语时，谓语动词使用复数形式。
=not only... but(also)... 不仅......而且......
反义词组：neither... nor... 既不......也不......
外语教学与研究出版社 九年级 | 全一册 Read the lesson and complete the table.returnspendlay restkillfindWork in groups of three to play a game.
Task tips: Each group should prepare some pieces of paper and divide them into three columns. Student A writes a person’s name in the first column, folds the paper and passes it to Student B. Student B writes a statement beginning with “who”, folds the paper and passes it to Student C. Student C must finish the sentence and read it out loud.
Example:Mr BrownWho is a biologistwill give us a talkJoin the sentences to make attributive clauses.
Example:
We did some experiments yesterday.The experiments were fantastic.
The experiments that we did yesterday were fantastic.
1.Listen and read.
2.Finish exercises of this lesson.
Homework课件22张PPT。Unit 5 Look into ScienceLesson 29 DNA-The Story of YouThis is the shape of DNA. “DNA” is short for deoxyribonucleic acid.Do you think it's magic? biology?生物?a??blueprint计划，蓝图complex复杂的，合成的pattern模式，图案，样品identify确定，认同general一般的，普通的introduction指令，命令，指示related有关系的，有关联的，叙述Read the lesson and answer the questions：What is a blueprint?
Which is more complex, building a living thing or building a house?
Do some twins have the same DNA?
Is it possible to change your DNA?
Whose DNA is related to yours?Read the lesson and answer the questions.
(1)What is a blueprint?
(2)Which is more complex, building a living thing or building a house?
(3)Do some twins have the same DNA?
A blueprint is a drawing that shows how to put a house together with many different parts.Building a living thing is far more complex than building a house. Yes,they do.(4)Is it possible to change your DNA?
(5)Whose DNA is related to yours?Yes, it is. In the future, scientists might be able to change our DNA.People who are related to me. For example,
my parents and grandparents.between与among
between用于两者之间，among一般指三者或三者以上。
Jack sits between Tim and Bob.
Jack坐在Tim和Bob之间。
She was among the crowd.
她处在人群中。use…to do sth. 用……做某事
She is using a knife to cut vegetables.
她正用小刀切蔬菜。
use的形容词是useful.
Is the fridge very useful?
这台冰箱很有用吗？too与either
too与either都表示“也”，其区别是too用于肯定句，表示“也”；either用于否定句，表示“也不”。他们通常都位于句末，其前用逗号隔开。
He has a babybrother, too.
他也有个小弟弟。
He doesn’t have an eraser, either.
他也没有橡皮。own的用法adj. 自己的（用在所有格后面，加强语气） He makes all his own notebooks.
她所有的衣服都是自己做的。
vt. 有；拥有
Who owns the car?
这辆汽车是谁的？
owner n. 所有人；物主
She is the owner of the house.
她是这座房子的主人。except for除……以外，只是
David is a good man except for hot temper.
大卫除了脾气暴躁以外，他是个好人。
The classroom is nice except for dirty on the floor.
教室除了地板脏以外都很好。Fill in the blanks with the phrases in the box.
in general, except for, not only…but also,
related to, even if, the same…as…
1.Your homework is quite good a few spelling mistakes.
2. the young the old like pop music.
3.Kate’s hair is colour her sister’s.
4. ,women live longer than men.
5. many difficulties remain, we can overcome them.
6.Is wealth happiness? except forNot only but alsothe same asIn generalEven ifrelated toComplete the passage with the sentences in the box.
Changing DNA
Do you know DNA can be changed? Have you ever seen a pig with a dog’s body? Of course not! Pigs and dogs can’t have babies together.________But now, scientists can do it. Scientists can take DNA from one kind of animal and put it into another kind of animal. They can design new plants by combining the DNA of other plants. ________ Some scientists are worried. They say we need to know more about DNA before we start changing it. But what if the plants are bad for humans, too?
A.Their DNA can’t combine.
B.We can make plants that are bad for pests.
C.They can even combine the DNA of a plant and an animal.ACB Is it a good idea to change the DNA of the food we eat?
Some people say doing this makes our food better. Others think it’s too dangerous.
1. Discuss the idea of yours.
2. Write down your ideas.Group work:1. Listen and read.
2. Finish exercises of this lesson.
Homework课件16张PPT。Unit 5 Look into ScienceLesson 30 Science Affects UsWhat would life be like without computers or mobile phones?moble phone手机????affect影响esuggest建议?eWhat do they do?Read the lesson and fill in the blanks：Science affects people’s lives. Without the scientific developments of recent years, our lives would be very different. Can you imagine life without computers or__ _______ ? Scientific are making our lives better and better.DNA is really one of the most amazing things on the earth. Many people think it will__________the world. everydaymobile phonesdiscoverieschange suggest v. 建议，提议
1) suggest sth. to sb. 向某人建议某事
2) suggest doing sth. 建议做某事
3) suggest that 建议……
4) suggestion n. 建议
better and better
比较级+and+比较级: “越来越……”。
My sister is getting more and more
beautiful.
我姐姐变得越来越美丽了。
lie, lay, lain与 lying的区别
lie vi. 躺，平放
过去式lay，过去分词lain，现在分词 lying
David was lying in the shade of the tree.
大卫正躺在树荫下。
Jerry lay down on his bed.
杰瑞躺在床上。lay vt. / vi. 放，置
过去式laid，过去分词laid，现在分词laying
Lay them on the floor. 把它们放在地板上。
lie vi. 说谎
过去式lied过去分词lied，现在分词lying
I’m sorry I lied to her. 我很抱歉向她撒了谎。
She is always telling a lie. 她总是说谎。Fill in the blanks with the correct forms of the words in the box.
discover, affect, suggest, place, develop
1.Jenny they use a stronger piece of cardboard for the experiment.
2.The air pressure the result of the experiment.
3.The experiment led to a wonderful .
4.What are your plans for the of your company?
5.They used a rock to hold the map in . suggestsaffectsdiscoverydevelopmentplaceGroup work：Have you ever done any interesting experiments?
Can you describe one of them?Here are some inventions.How do they affect our everyday lives?Talk about them with your partner.Example:
With TV
I watch TV to get information.
Without TV
I would spend more time talking with my family.
TV, camera, radio, computer, telephone,
light bulb, clock, washing machine, compass, telescope, X-ray, eyeglassesWriting:
Write a letter about your experiments you have did to your pen pal.1. Listen and read.
2. Finish exercises of this lesson.
Homework
