资源简介

(共40张PPT)
Unit5 Power of ideas
Section B (1a-1f)
2026新人教版九上
Learning Objectives
By the end of this lesson, we will be able to:
1. Use past passive voice and sequence words to describe the process of making paper.
2. Analyze the problem-solution-impact structure and evaluate Cai Lun’s contribution.
3. Sequence the paper-making steps and retell the process using the passive voice.
What are the four great inventions in China
Paper-making
Compass
Gunpowder
Printing
Which one do you think is the most important Why
What material are these things made of
Find more things that are made of this material.
paper
Title: An Invention That Changed the World
The passage is mainly about
____________________.
an invention
What invention is the text about
papermaking
Think and share
What do you know about the papermaking
Paragraph 1
Paragraph 2
Paragraph 3
Paragraph 4
Paragraph 5
A. Early materials to write on
B. Cai Lun’s experiment was successful
C. Papermaking shaped the modern world
D. How paper changed the world
E. Cai Lun’s creative idea
Read the text and match each paragraph with its topic.
1b
What’s the structure of this passage
What’s the main idea of each part
A. ①②/③④/⑤
B. ①/②/③④/⑤
Part 1(para.1): introduction
Part 2(para.2): problem
Part 3(para.3&4): solution
Part 4(para.5): impact
Common structure about inventions: Problem → Solution → Impact.
Find out what these pronouns from the text refer to.
1c
It in Paragraph 1: ________
his in Paragraph 3: ________
It in Paragraph 5: ________
it in Paragraph 5: ________
This in Paragraph 5: ________
Understanding reference words
Noticing what pronouns refer to will help you understand how different parts of the reading are connected.
Tips: Locate pronouns and find matching nouns ahead.
Can you imagine a world without books, newspapers, or magazines All of these things depend on one invention—papermaking. It, more than any other invention, was responsible for the rapid spread of information that shaped our modern world.
Tips: Locate pronouns and find matching nouns ahead.
It in Paragraph 1: ________
① Locate the pronoun.
②Underline the sentence before the pronoun.
③Find matching noun and check if it makes sense.
papermaking
something
As the head officer of the palace workshop for the emperor in the Eastern Han Dynasty, Cai Lun became interested in trying to solve the problem. Different methods for creating something to write on were tried, but none were ideal. In his times, some kinds of bark—the outside part of trees—were used to make clothes. From past experiences, Cai Lun got the idea that bark, certain plants, and old clothes could be used to make a special material suitable to write on.
Tips: Locate pronouns and find matching nouns ahead.
his in Paragraph 3: ________
① Locate the pronoun.
②Underline the sentence before the pronoun.
③Find matching noun and check if it makes sense.
Cai Lun’s
somebody’s
Later on, the papermaking technique did not only speed up the development of Chinese culture, but also changed civilizations around the world. It first spread to China’s neighbouring countries and finally reached Europe through Arabic countries in the 12th century. When the use of paper and printing came together in later centuries, it led to a rapid increase in the number of books. This resulted in a new birth of knowledge, creating the world we have today.
Tips: Locate pronouns and find matching nouns ahead.
It in Paragraph 5: ____________________
① Locate the pronoun.
②Underline the sentence before the pronoun.
③Find matching noun and check if it makes sense.
the papermaking technique
something
Later on, the papermaking technique did not only speed up the development of Chinese culture, but also changed civilizations around the world. It first spread to China’s neighbouring countries and finally reached Europe through Arabic countries in the 12th century. When the use of paper and printing came together in later centuries, it led to a rapid increase in the number of books. This resulted in a new birth of knowledge, creating the world we have today.
Tips: Locate pronouns and find matching nouns ahead.
it in Paragraph 5: ____________________
① Locate the pronoun.
②Underline the sentence before the pronoun.
③Find matching noun and check if it makes sense.
the use of paper and printing
something
Later on, the papermaking technique did not only speed up the development of Chinese culture, but also changed civilizations around the world. It first spread to China’s neighbouring countries and finally reached Europe through Arabic countries in the 12th century. When the use of paper and printing came together in later centuries, it led to a rapid increase in the number of books. This resulted in a new birth of knowledge, creating the world we have today.
Tips: Locate pronouns and find matching nouns ahead.
this in Paragraph 5: ____________________
① Locate the pronoun.
②Underline the sentence before the pronoun.
③Find matching noun and check if it makes sense.
the rapid increase in the number of books
something
Materials to write on before Cai’s paper
Cai Lun’s paper
What’s the difference between Cai Lun’s paper
and materials to write on before it
Read again and complete the table.
1d
Question Material to write on before Cai Lun Cai Lun’s paper
What was it like
What was used to make it
Para.2
Para.3&4
Can you imagine a world without books, newspapers, or magazines All of these things depend on one invention—papermaking. It, more than any other invention, was responsible for the rapid spread of information that shaped our modern world.
In ancient China, many different materials were used to write on, such as animal bones, bronze wares, stones, wood, bamboo, and even silk. In the Western Han Dynasty, there was also a very early form of paper made from jute—a fibre that comes from plants. However, all of these materials were either difficult to use and store or very expensive.
What was it like
What was used to make it
Material to write on
before Cai Lun
It is difficult to use and store or very expensive.
Animal bones, bronze wares, stones, wood, bamboo, even silk and jute.
As the head officer of the palace workshop for the emperor in the Eastern Han Dynasty, Cai Lun became interested in trying to solve the problem. Different methods for creating something to write on were tried, but none were ideal. In his times, some kinds of bark—the outside part of trees—were used to make clothes. From past experiences, Cai Lun got the idea that bark, certain plants, and old clothes could be used to make a special material suitable to write on.
In the first step of Cai Lun’s experiment, all the ingredients were mixed and boiled in water. Then, this material was beaten, cut up, and mixed with water again. Next, the liquid was poured over a bamboo screen, leaving just the fibre. Finally, this fibre was dried and pressed to form paper. To everyone‘s surprise, this paper was soft, light, easy to make and use, and most importantly, cheap. In 105 CE, Cai Lun showed his creation to the emperor. The emperor was very pleased and praised Cai Lun for his great work.
What was it like
What was used to make it
Cai Lun’s paper
It was soft, light, easy to make and use, and most importantly, cheap.
Bark, certain plants, and old clothes.
Read again and complete the table.
1d
Question Material to write on before Cai Lun Cai Lun’s paper
What was it like
What was used to make it
difficult to use and store
very expensive
animal bones, bronze wares, stones, wood, bamboo, and even silk
soft, light, easy to make and use
cheap
bark, certain plants, and old clothes
Put the sentences in order. Then retell the process of making paper in your own words.
1e
A. The material was beaten, cut up, and mixed with water.
B. All the ingredients were mixed and boiled in water.
C. The fibre was dried and pressed to form paper.
D. The liquid was poured over a bamboo screen, leaving just the fibre.
Para.4
In the first step of Cai Lun’s experiment, all the ingredients were mixed and boiled in water. Then, this material was beaten, cut up, and mixed with water again. Next, the liquid was poured over a bamboo screen, leaving just the fibre. Finally, this fibre was dried and pressed to form paper. To everyone‘s surprise, this paper was soft, light, easy to make and use, and most importantly, cheap. In 105 CE, Cai Lun showed his creation to the emperor. The emperor was very pleased and praised Cai Lun for his great work.
A. The material was beaten, cut up, and mixed with water.
B. All the ingredients were mixed and boiled in water.
C. The fibre was dried and pressed to form paper.
D. The liquid was poured over a bamboo screen, leaving just the fibre.
B. All the ingredients were mixed and boiled in water.
A. The material was beaten, cut up, and mixed with water.
D. The liquid was poured over a bamboo screen, leaving just the fibre.
C. The fibre was dried and pressed to form paper.
Retell the process of making paper in your own words.
How did papermaking make a difference to the world
Later on, the papermaking technique did not only speed up the development of Chinese culture, but also changed civilizations around the world. It first spread to China’s neighbouring countries and finally reached Europe through Arabic countries in the 12th century. When the use of paper and printing came together in later centuries, it led to a rapid increase in the number of books. This resulted in a new birth of knowledge, creating the world we have today.
speed up the development of Chinese culture
change civilizations around the world
lead to a rapid increase in the number of books
result in a new birth of knowledge
How did papermaking make a difference to the world
Discuss the questions.
1f
What other great inventions do you know that were made in ancient China How was the world changed by them
What qualities do you think a great inventor has
The impact of the four great inventions in China
What qualities do you think a great inventor has
Curiosity — they ask questions and want to know how things work.
Creativity — they think of new ideas and new solutions.
Perseverance — they never give up, even when things get hard.
1. It, more than any other invention, was responsible for the rapid...
Language Points
responsible /r sp ns bl/adj. 作为原因的；有责任的
用法：形容词，常与 for 搭配，表对… 负责、是… 的原因
搭配：be responsible for 对… 负责；引起
同义：accountable 有责任的
词形变换：responsibility n. 责任
例句：He is responsible for this project.（他负责这个项目。）
2. ...for the rapid spread of information that shaped our modern world.
Language Points
shape / e p/v. 塑造 n. 形状
词形变换：shapes pl.
用法：名词表形状，动词表塑造、影响
同义：form 形状；mould 塑造
搭配：in the shape of 呈… 形状；shape one's life 塑造人生
例句：Clouds have different shapes.（云朵有不同的形状。）
3. This resulted in a new birth of knowledge.
Language Points
result in 造成；导致
用法：动词短语，后接结果，主语为原因
搭配：result in trouble 导致麻烦；result in failure 导致失败
例句：Carelessness will result in mistakes.（粗心会导致错误。）
同义：lead to 导致
lead to success 导致成功；lead to problems 导致问题
Hard work leads to success.（努力工作会带来成功。）
4. This resulted in a new birth of knowledge.
Language Points
birth /b θ/n. 起源；诞生
用法：不可数名词，指出生、诞生
搭配：give birth to 诞生；the birth of …… 的诞生
例句：The birth of the computer changed the world.（电脑的诞生改变了世界。）
同义：beginning 起源
词形变换：bear v. 生育→born 过去分词
根据首字母及汉语提示，完成下列单词的拼写
1. [传统文化] In the Chinese lunar calendar, each year is named after one of the 12 animals based on the year of a person's ___________ (出生).
2. The school organized a science ___________ (作坊) where students could build simple robots by hand.
3. For ___________ (某些) reasons, the invention exhibition has been postponed until next month.
4. Travelling by subway is ___________ (便宜的), while taking a private car is ___________ (昂贵的).
5. We should keep up with the ___________ (迅速的) development of AI technology, or we will fall behind.
birth
workshop
certain
cheap
expensive
rapid
Ⅱ. 用括号内所给单词的适当形式填空
6. This quiet park is a ___________ (suit) place for reading and relaxing.
7. There are some huge ___________ (stone) on the path. Be careful not to trip over them.
8. After years of planning, their dream of building a smart home finally became a ___________ (real).
9. Two police ___________ (office) were directing traffic at the busy crossroads.
10. The beautiful clay pot is my own ___________ (create). I made it in the art class.
suitable
stones
reality
officers
creation

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