Unit 5 Look into Science Lesson 25 Let’s Do an Experiment! 课件

课件16张PPT。

Lesson 25
Let’s Do an Experiment!Learning aims:·Aim of knowledge(知识目标)
A. Vocabulary: （词汇）
science experiment prove observe cardboard fill…with cover….with, turn upside down inside outside
B. Sentence Patterns（句子）
1. I’m sure the floor won’t get wet.
2. I’m not sure. I think the floor will get wet.
3. Maybe you should do this experiment outside.
·Aim of ability（能力目标）
How to to talk about certainty and uncertainty.
·Aim of emotion(情感目标)
Arouse the students’ interest in doing science experiment.
science 科学
experiment 实验;试验
theory 理论;学说
fill 装满
jar 广口瓶; 罐子
upside 上部;上边
prove 证实; 证明
observe 观察;监视
scientific 科学的　
method 方法; 办法Learn the words and expressionsFill in the blanks with the right words
and the first letter is given.
1. Let’s do an e .
2. Brian has one t and
Danny has another.
3. They can p who’s right.
4. I turn the jar u down.
5. Please o carefully.xperimentheoryrovepsidebserve.

·1. What will Brain do?He will do an experiment
1. Why does Danny say they should do this experiment outside?
Because Danny thinks the floor will get wet.
2. What’s Brain’s theory?
Brian is sure the floor won′t get wet.QUESTIONS Finish off these exercises.1.用……把……装满 ______________
2.用……把……盖住 ______________
3.我(不)确信…… _________________
4.正面朝上 ______________
5.把……翻转_______________________________
6.get wet __________ 7.do an experiment __________
8.a piece of cardboard ______________
9.inside（反义词） ________ 10.theory（复数） _____
11.careful (副词）_______ 11.science(形容词）______fill…with…cover …with…I am (not) sure…
right side upturn …upside down / turn …over变湿做一个实验一块硬纸板outsidetheoriescarefullyscientificLet's do itWrite down the steps of doing the experiment
1. Fill a jar with water.
2. Cover the top with a piece of cardboard.
3. Turn the jar upside down.
What will happen ? You may say…
I’m sure…
I’m not sure… The floor will get wet.
I think… The floor won’t get wet
Maybe… The cardboard can keep the
water in the jar.
一、I fill a jar with water. 我用水把瓶子装满。 fill …with… 用……装满…… (主语是人)
be full of … / be filled with… (主语是物或容器)
同义句转换。
1.The rooms are full of the students now.
The rooms _____ _____ _____ the students now.
2.My pocket is filled with the money.
My pocket _____ _____ _____ the money.
选择。
5. Can you ______ the box _______ books? ( )
A fill ,with B full ,with C filled ,with D full , in
6.The child _____ all the bowls ______ water.( )
A fill,with B fills, with C is full ,with D is filled ,with
are filled with is full of AB学以致用二. I turn the jar upside down. 我把广口瓶倒置。upside down 的意思是“向下翻转过来”.
You hold the book upside down. 你把书拿倒了。
right side up 是“正面朝上”的意思That picture is upside down.
学以致用三、 I’m sure the floor won’t get wet. 我确信地板不会湿。
b e sure 表示肯定, 有把握,而be not sure 表示不确定
be sure/ be not sure 后可接句子，还可接代词、名词、动名词或不定式。
常见用法： be sure of sb / doing sth , be sure to do sth
完成下列各题。
1.我确信她会来。_________that she will come here.
2.他没有把握通过考试_____________to past the exam.
3.I’m sure _________ Jim plays basketball well .（ ）
A of B to C that D withI’m sureHe’s not sureCPRACTISE
.
. ⒈ He ____ the stockings ____ christmas presents. （用…装满）⒉ Please pass me a bottle ___ water.
A. full with B. filled of C. filling with D. full of⒊ My mother is holding the book _____ _____ . （倒着）我弟弟用一块玻璃盖住了那个杯子。
⒋ My brother ______ the glass ____ a piece of glass⒌ 我肯定他会来。
____ ___ ____ he will come.
filledwithDupside downcoveredwith I am sureNew words:
science scientific experiment fill prove method theory jar observe
Phrases :
be filled with ＝be full of cover …with… turn …upside down
Sentence Patterns:sb. be sure +that 从句sb. be not sure +疑问词引导的从句How do we do the experimentFirst, ____ a jar _____ water.
Then ,_____ the top ____ a piece of cardboard.
Finally, ____ the jar ______ ______. withwithturnfillcoverupside downRead the text again and again till you can describe the content of the text by yourself .
Learn to express sequence.
Don′t forget to preview the next lesson.
Thank you for your presence and guidance!
Good-Bye