(共22张PPT)
Unit 4 Amazing Science
Topic 1 When was it invented
Section C
balloon
gun
robot
keyboard
1.What are the top 3 most important inventions Why
2.Which is the least important invention Why
学习目标
We learn : 1.Some words: invention, crayon, thought,
silly, balloon, gun, robot, keyboard
2.Some phrases: laugh at，come about，
the result of …， none of …
We can : 1. Talk about the process of an invention.
2. Write a passage about an invention.
invention
crayon
thought
silly
brainstorm
evaluate
redesign
detailed
愚蠢的，傻的
发明，创造
彩色铅笔
想法，看法，主意
集思广益，动脑筋
重新设计
估值，评价，评估
详细的
Match the words with their meanings.
i________ n. the creation of something in the mind; the act of inventing
c________ n. a rod(棒） of colored wax（蜡） used for drawing
t________ n. an idea that you have in your mind
s________ adj.foolish
b________n. small thin inflatable(可充气的） rubber bag with narrow neck
g________ n. a weapon（武器） from which bullets（子弹） or other things are fired
r________ n. a machine that can move automatically（自动地）
k________ n. the set of keys that you press in order to operate it
Complete the following words according to their first letters and meanings.
nvention
rayon
hought
illy
alloon
un
obot
eyboard
学习指导﹙学习1a﹚
1.Work in groups and discuss the questions before reading. Then read 1a and check.
Read 1a and put the sentences in the correct places . Finish 1b.
Listen to 1a and repeat, pay attention to the pronunciation and intonation.
Read 1a again and fill in the blanks. Finish 1c.
1a Read and understand.
自研共探：（5mins)
参照118页Section C的课文注释，自读1a,并口头翻译,要弄懂每个句子，划出重点短语和句型，若有不理解的语言点，可向本小组同学求助，然后小组讨论，解决自学中的疑惑点。
1. 读1a，完成1b和1c。
2. 从1a中找出重点短语及句型，理解并熟记。
Work in groups and discuss the questions before reading.
What is an invention
invention n.发明，创造
invent v. 发明，创造
inventor n. 发明者，发明家
An invention may be a new product or a new way of doing things.
2.List some inventions that you know and their inventors.
computer lock television light bulb chopsticks crayon …
3.Do you think you can be an inventor Why
Yes, inventing is interesting and exciting and everyone can be an inventor.
v.列清单，把…列表
n.彩色铅笔（粉笔，蜡笔）等
Work in groups and discuss the questions before reading.
A. Draw your invention. B. Name your invention.
C. Test your invention. D. Use your imagination.
E. Plan and design your invention.
1b Read 1a and put the sentences in the correct places .
___ You can have wild and crazy thoughts. Remember that no idea is too silly. Many people laughed at the Wright brothers and said they would never fly. But they weren’t discouraged by what people said. That’s why now we have planes.
D
想像力
1b Read 1a and put the sentences in the correct places .
_______ Careful planning is important in the invention process. This is the time to brainstorm for ideas and to evaluate them.
_______ Make a detailed drawing of your invention so others will understand how your invention works.
Make a model of your invention.
_______ See if your invention works as it is planned . If not, do more research, redesign it, and test it again.
_______ Every invention needs a name.
Share your inventions with others.
E
A
C
B
1c Read 1a again and fill in the blanks.
When you want to have an invention , first you must use your ________. Then you should plan and design it. Careful planning is very _________ in the invention. Third, you should make a _______ drawing of your invention and make a model of it. If you want to make your invention more successful, you must ______ it again and again. After that, you _______ your invention. Last, remember that you should _______ your invention with others.
imagination
important
detailed
test
name
share
Can you list it
1. An invention – come about –solve a problem– the result of –crayons—none of –be made in –interesting, exciting – inventor –a few simple steps
2.Use your imagination– thought– silly – laugh at –be discouraged
3.Plan and design your invention– be important to –brainstorm– evaluate
4.Draw your invention—make a detailed drawing
5. Make a model
6.Test your invention --do more research
7. Name your invention
8. Share…with
Retell it
2 Discuss with your partner which of the followings are the top 3 most important inventions and which is the least important invention. Then explain your choice to the class.
Example:
I think zero is the most important invention. It is said that it was invented by an Indian. It is a very interesting number. For example, I have only ten yuan. If you add five zeros after it for me, haha, I will be a rich man.
3 Do you know how to be an inventor Do you want to invent something Write a passage about your invention. The following questions may help you .
1. How do you come to the idea of your invention
2. What does it look like
3. What is it made of/from
4. What’s it used for
5. What are you going to name it
Before writing, think more clearly and tell about the looks, uses, advantages and disadvantages of an object.
My invention is a robot. It is called “Superman”. There is a computer inside its body. It looks like a tiger. When you see it for the first time, you may be frightened. In fact, it is gentle and polite. It can help us do housework, such as cleaning a room, washing dishes, and making the bed. When the room is dirty, it will begin to work at once. It can also watch over a house instead of humans. It is careful, clever and hard-working. In short, this robot is very useful to us, though it can’t run or speak.
You can write it like this:
Summary
We learn : 1.Some words: invention, crayon, thought,
silly, balloon, gun, robot, keyboard
2.Some phrases: laugh at，come about，
the result of …， none of …
3. Some sentences:
Inventing is interesting and exciting and everyone
can be an inventor .
We can : 1. Talk about the process of an invention.
2. Write a passage about an invention.
1.People used the light bulbs widely in the past. (改为被动语态）
The light bulbs ______ ______ _______ by people in the
past.
2. The MP3 player was developed around 1998. (对划线部分提问)
________ ________ the MP3 player _______________
were widely used
When was
developed
(A)根据句意及首字母提示补全单词。
1.Don’t forget to l_____ the door when you leave home.
2.That was a s_____ thing to do! You shouldn’t do like that again.
3.The horse with a white m_____ on its head is my father’s.
4.Every computer has a k_____.
5.She was struck by the sudden t_____ that he might have already left home.
(B)根据句意，用所给单词的适当形式填空。
6.Fax machines were a wonderful ______(invent) at that time.
7.I have bought many _____(crayon) for my daughter.
8.He was killed by a _____ (gun) in the war.
9.These cars were built by _____ (robot) in that factory.
10.Many children like blowing _____(ballon).
