冀教版九年级上册Lesson 30 Science Affects Us教学课件ppt

设计说明

本课共两篇电子邮件，采取分别教学的原则。首先,通过描述Lesson 25所学实验的过程引入本课第一封电子邮件的学习，并通过讨论该实验，利用图片学习其中的生词和短语。接着，通过听后回答问题、读后回答问题和阅读找短语并翻译短语三个步骤展开学习该电子邮件。然后，利用手机的图片并通过谈论手机对生活的影响学习生词和短语，并利用Let’s Do It! No.2练习巩固所学词汇。其次，进入对第二封电子邮件的学习：通过听后回答问题、读后匹配、读后填空 (Let’s Do It! No.1)、读后复述等环节逐步加深对该邮件的学习和理解。最后，利用Let’s Do It! No.3练习描述发明对日常生活的影响。

整个课堂既体现了阅读教学的环节和目的，又融入了对听说的练习，达到了听、说、读的相互交融和共同练习的目的。

教学目标

通过本课节的教学，学生达成以下目标：

1. 知识目标

掌握单词：suggest, development, mobile phone, discovery

接触单词：affect

短语：turn...over, push up, push down, in place

2. 能力目标

(1) 掌握本课所学的单词和英语表达；

(2) 能用英语描述实验过程；

(3) 能描述科技的发展对我们日常生活的影响。

3. 情感目标

努力学习科学知识，让科学造福人类。

重点难点

1. 重点：掌握本课所学的单词和英语表达。

2. 难点：能描述科技的发展对我们日常生活的影响。

教学准备

PPT 课件；本课节用到的音频。

授课时数

1课时

教学过程

Step 1  Warming up

Get the class to describe how to do the experiment according to the pictures.

Step 2  Presentation  

Teach the new words suggest and expressions turn...over, in place, push up, push down with the pictures by talking about the experiment.

Teacher says: When we do the experiment, we should turn the jar upside down.

That is, we should turn the jar over. After we take our hands off, the water in the jar can’t pour out. Why? Because the air pressure pushing up on the cardboard is higher than that of the water pushing down from inside the jar. The higher air pressure outside the jar holds the cardboard in place. The experiment is very interesting. I suggest you try it, too.

Step 3  Listening and answering

Get the class to listen to the first email and answer the questions.

1.Who is the email to?

2. Who is the email from?

 Answers: 1. Wang Mei.   2. Jenny.

Step 4  Reading

1. Get the class to read the first email and answer the questions.

(1) When did they do the experiment?

(2) How many steps do they need to do the experiment?  

(3) Why does the cardboard hold the water in the jar?

(4) What does Jenny think of science?

Answers: (1) This week. 　(2) Two. 　

(3) The air pressure pushing up on the cardboard is higher than that of the water pushing down from inside the jar. The higher air pressure outside the jar holds the cardboard in place.

(4) It’s interesting.

2. Get the class to read the first email and find the following expressions. Then

translate them into Chinese.

cover...with sth. 用某物盖住……

 turn…over把……翻转  

take...off把……拿开

 air pressure气压

push up向上推

 push down向下按

 in place原地；在适当的位置

Step 5  Presentation

  Teach the new words affect, development, discovery, mobile phone with the pictures by talking about the mobile phone.

Teacher says: Look! What’s this? (It’s a mobile phone.) Can you imagine what

life would be like without mobile phones?(...) So, mobile phones affect our everyday life. Our life will be very different with the scientific development. Scientific discoveries are making our lives better and better. Do you agree with me?

Step 6  Exercises

Fill in the blanks with the correct forms of the words in the box. (Let’s Do It!

No. 2)

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___________.

Answers: 1. suggests/suggested  2. affects/affected  3. discovery

4. development  5. place

Step 7  Listening and answering

Get the class to listen to the second email and answer the questions.

1. What does Wang Mei think of science?

2. What does Wang Mei enjoy learning about?

 Answers: 1. It’s interesting.

         2. DNA.

Step 8  Reading

1. Get the class to read the second email and match.

  Paragraphs               Main ideas

Answers: (above)

2. Get the class to read the second email and fill in the blanks. (Let’s Do It! No. 1)

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.

Answers: everyday, mobile phones, discoveries, change

3. Get the class to read the second email and find the following expressions. Then translate them into Chinese.

everyday life日常生活

 scientific development科学发展

 mobile phone手机

scientific discovery科学发现

better and better越来越好

enjoy doing sth. 喜欢做某事

 learn about了解

one of the+最高级+名词复数 最……的……之一

on the earth在地球上

        It is/was+ adj. +to do sth. 做某事是……

Step 9  Reading and retelling

  Get the class to read the second email and retell it.

Step 10  Discussion

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.

________________________________________________________

________________________________________________________

________________________________________________________

_______________________________________________________

Step 11  Summary

 Sum up what we’ve learnt in this period with the class.

  1.本课节所学的重要表达

    turn...over 使……翻转

    push up 向上推

    push down 向下按

    in place  原地；在适当的位置

2.如何描述实验及科学对生活的影响

Step 12  Language points

1. I suggest you try it, too!我建议你也试一下！

  suggest  v. 建议；提议。常用于以下结构：

  ① suggest sth. (to sb. ) (向某人)建议某事

   Visitors suggest a name for the new baby panda to the zoo.

   游客们向动物园建议了一个新生大熊猫宝宝的名字。

  ② suggest doing sth.建议做某事

   They suggested meeting for a drink after work.

   他们建议下班后一起喝一杯。

  ③ suggest +that从句  建议……(从句用虚拟语气，即(should +)动词原形, should可以省略)

   Her mother suggested that she should go to see the doctor.

   她妈妈建议她应去看医生。  

2. The air pressure pushing up on the cardboard in higher than that of the water pushing down from inside the jar.

向上作用于纸片的气压比广口瓶里的水向下作用于纸片的压力大。

  push up 向上推

  其反义短语push down意为“向下按；推倒；压倒”。

  Could you help me push up the window?

  你能帮我把窗户推上去吗？

  He pushes down the sand hard.

  他用力把沙子压实。

3. The higher air pressure outside the jar holds the cardboard in place.

广口瓶外更大的气压使纸片留在原位置。

 in place  在原地；在适当的位置

 Please put everything in place.

 请把一切放到适当的位置。

 The chairs for the concert were nearly all in place.   

 音乐会要用的椅子差不多都摆好了。

4. Scientific discoveries are making our life better and better.

科学发现正使我们的生活越来越好。

  discovery  n. 发现；发觉。 复数形式是discoveries。

  This is an important discovery. 这是一个重要的发现。

 【拓展】

  discover  v.  发现。后加名词、代词或宾语从句。

  We have discovered their secrets.

  我们已经发现了他们的秘密。

Step 13  Homework

1. Remember the new words and expressions learnt in this lesson.

2. Write a passage about how some inventions affect our lives.

3. Preview Unit Review.

当堂达标

Ⅰ.根据句意及提示写出单词

1. His suggestion won’t ________ (影响) my decision.

2. Danny suggested _____________ (have) a meeting at once.

3. We are proud of China because of the quick ____________ (develop).

4. The ________ (discover) of oil here made people richer.

5. People enjoy_________(eat) zongzi on the Dragon Boat Festival.

6. ______________(手机) make our lives more convenient.

Ⅱ. 连词成句

1. cup, the, over, Jenny, turns

  ________________________________________ .

2. can, cardboard, up, the air pressure, on, push, the

  _________________________________________.

3. our, affect, lives, can, everyday, science

  _______________________________________?

4. are, desks, in, all, the, place

  ________________________________________ .

5. would, TV, the, what, be, without, like, life

  _______________________________________ ?

答案: Ⅰ. 1. affect  2. having  3. development   4. discovery  5. eating

6. Mobile phones

Ⅱ.1. Jenny turns the cup over

  2. The air pressure can push up on the cardboard

3. Can science affect our everyday lives

4. All the desks are in place/ The desks are all in place

5. What would the life be like without TV

板书设计

教学反思