Unit 4 Topic 1 Section C课件（仁爱科普版九年级上册）

(共21张PPT)
Unit 4 Amazing Science
Topic 1 When was it invented？
Section C
By the end of the class, you will be able to
1. Master the following words, phrases and sentences:
Words： invention, crayon, thought, silly, balloon, gun, robot, keyboard
Phrases: laugh at, come about, the result of …, none of …
Sentences：Inventing is interesting and exciting and everyone can be an inventor.
2. Talk about the process of an invention.
3. Write a passage about an invention.
The Four Great Inventions in China
paper-making
printing
compass
gunpowder
What are these
Work in groups and discuss the questions before reading. Then read and check.
1. What is an invention
2. List some inventions that you know and their inventors.
3. Do you think you can be an inventor Why
1a Read and understand.
An invention may be a new product or a new way of doing things. Inventions come about in many ways. Most of the time, inventions happen because someone works to solve a problem. Sometimes inventions are the result of accidents. Look at your schoolbags. You have pencils, pens, crayons, rulers and some books. None of these things was planted in fields. They were made in factories and invented by someone. Inventing is interesting and exciting and everyone can be an inventor. Do you want to be an inventor There are a few simple steps to follow in the invention process.
1a Read and understand.
_____ 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.
_____ 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.
A. Draw your invention.
B. Name your invention.
C. Test your invention.
D. Use your imagination.
E. Plan and design your invention.
1b Read 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.
_____ 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.
D
E
A
C
B
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.
1c Read 1a again and fill in the blanks.
imagination
important
detailed
test
name
share
1. come about 出现，发生
How did this dangerous situation come about
这样危险的局面是怎样出现的？
2. solve a problem 解决一个问题
solve & answer
solve的宾语多为problem, answer的宾语多为question。
3. no one和none都表示否定，但用法有所不同，它们的区别是：
a. no one用来指人，含有not even one（连一个人也没有）之意，其后不能接of短语。用作主语时，谓语动词要用单数。
No one knew who took the book by mistake.
没有人知道谁误拿了这本书。
No one likes a person with bad manners.
谁也不喜欢不讲礼貌的人。
—Who is in your classroom now 谁现在在教室里？
—No one. 没有人。
b. none不仅指人也可指物，其后常接of短语，构成“none of+名词/代词”结构。当名词是复数时，谓语动词单复数均可。
None of the houses has/have a large garden in some big cities.
在一些大城里，没有一幢房子带有大花园。
—How many people are there in your classroom now
现在你班里有多少人？
—None.
没有人。
4. Inventing is interesting.
发明是有趣的。
此处inventing是动名词作主语，动名词作主语。谓语动词用单数形式。
5. in the invention process
在发明过程中
2 Discuss with your partner which of the following are the top 3 most important inventions and which is the least important invention. Then explain your choice to the class.
candy computer medicine balloon gun
robot lock scissors spaceship zero
chopsticks light bulb keyboard television X-ray machine
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 up with 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.
一、单项选择
( ) 1. The stars _____ as soon as it was dark.
A. came down B. came in C. came out
( ) 2. Can you tell me how the accident _____
A. came down B. come about C. came about
( ) 3. —How many children did you see in the park yesterday —_____.
A. None B. Little C. No one
( ) 4.—Who knows the answer to the question —_____.
A. Little B. A little C. No one
C
C
A
C
一、单项选择
( ) 5. —Have you sent your parents and grandparents an email telling them you arrived safe
—No. _____ of them can use a computer.
A. None B. Both C. Neither
( ) 6. No one but the Whites _____ the place so far.
A. visit B. has visited C. have visited
A
B
二、根据括号内所给提示完成句子
1. Fax machines were a wonderful __________(invent) at that time.
2. I have bought many ________(crayon) for my daughter.
3. He was killed by a _____ (gun) in the war.
4. These cars were built by ______ (robot) in that factory.
5. Many children like blowing ________(balloon).
invention
crayons
gun
robots
balloons
三、按要求完成句子
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. We can launch spaceships to explore other planets. (改为被动语态）
Spaceships ______ ____ _________to explore other planets.
3. Gore Verbiniski directed the movie Pirates of the Caribean in America . (对划线部分提问）
_______ ______ Gore Verbiniski ________ the movie Pirates of the Caribbean
4. The MP3 player was developed around 1998. (对划线部分提问)
________ ________ the MP3 player _______________
were widely used
can be launched
Where did
direct
When was
developed
We learn:
1. Talk about the process of an invention.
2. Write a passage about an invention.
We can:
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.
1. Read 1a again.
2. Finish Section C in your workbook.
3. Preview Section D.