Lesson 25 Let’s Do an Experiment!第二课时教案

冀教版

九年级

Lesson 25: Let’s Do an Experiment!

课题

Lesson 25 Let’s Do an Experiment!

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一、重点词汇

Science, experiment, theory, fill, jar, upside, probe, observe 二、重点句型

1）A theory predicts what will happen. 2）I’m not sure.

3）Maybe you should do this experiment outside, Brian! Write a composition to describe an interesting experiment. 课型

New 课时

One 知识目标:Words and expressions 能力目标:Do and express the experiment

德育目标:Love science 教学

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Talk ,listen , read, practice 学法

Talk ,listen , read, practice

教具

tape slides

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Lesson 25 【辨析比较】maybe与may be

【辨析比较】another, the other, other, others

【拓展延伸】含有turn的动词短语有：

turn on开，旋开（电灯、无线电、水龙头等）

turn off关掉

turn away转过脸不面对

turn over翻身，翻过来

turn up调高，调大

turn down关小，调低

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学生活动

Step 1.Greetings.

设计意图：让学生做好上课的准备。

Step 2. Think about it. Try to answer the 1. What kinds of experiments have you done in science class?

two questions. 2. If you hold a jar that is filled with water upside down, what will happen?

设计意图：与学生进行一个简短的对话，进入本课主题。

Step 3. Show the pictures. Enjoy the pictures. Show the students two pictures to let them know two phrases.

设计意图：通过展示图片让学生理解两个短语的含义。

Step 4. Read and answer

Read the text and answer the following questions: Read the text in 1) Why does Danny say they should do this experiment outside? groups. 2) What will Brian do?

3) Does Danny have the same theory as Brian’s?

设计意图：让学生带着任务读课文。

Step 5. Let’s do it.

1)

Discuss in groups about the experiment.

2)

Make a list of the materials and tools that we were used in the Have a discussion experiment. with your group 3)

Write down two different theories.

mates. 4)

Write down the steps of doing the experiment.

5)

Write down the result of the experiment.

6)

Make a conclusion.

设计意图：让学生通过小组合作对这一实验的设计及结果更加明确。

Step 6. Language Points

1)

fill …with…

用……装满……

He has filled his case with many books. 他已经把书装满了箱子。

2) cover…with… 用……盖住……

Let the students I cover the top with a piece of cardboard. write the 3)

upside down 的意思是“向下翻转过来”。

important You hold the book upside down.

你把书拿倒了。

language down. 拓展：right side up 是“正面朝上”的意思。

4）be sure +that 从句表示“认为……一定……”。

而be not sure表示不确定。

I’m sure she will come here.

我确信她会来。

I’m not sure when he’ll come here.

我不能肯定他什么时候来这儿。

5) observed 动词, “观察”observe sb. do/ doing sth.

例句：I observed her dance. When I passed by the grass, I observed him walking. 设计意图：通过教师讲解让学生对重点知识更加熟悉。

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矫正反馈

Step 7. Exercises Let the students do some exercises about the key points. 设计意图：通过练习让学生巩固本课的重点知识。

Step 8. Homework 请根据课文内容, 以

“An Interesting

Experiment”为题写一篇小作文。

Students do some exercises.

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一、根据句意及首字母提示完成下列句子。

1. Do you often do e __________ in your physics class? 2. I’ll p ____ that what he said is right. 3. He likes to read books about s _____. 4. Mr. Smart sat in a corner and o _______ what was going on with this little aunt. 二、选择与划线部分意思相同或相近的词。

1. Is the theory right or wrong?

A. idea

B. way

C. mind

D. answer 2. Don’t turn the bottle upside down.

A. away

B. off

C. up

D. over 3. When I do the experiment, you must watch closely.

A. learn

B. know

C. see

D. observe 4. -- Excuse me! May I ask you a question?

-- Certainly.

A. No

B. Sorry

C. Sure

D. Thanks

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