Unit 5 Power of Ideas Section B 1a-1e课件2026-2027学年人教版英语九年级上册

Unit 5 Power of ideas Section B 1a-1e How do we turn ideas into reality? Learning Objectives 1 2 3 通过阅读关于造纸术的语篇，获取古代书写材料、蔡伦改进造纸术的实验过程以及造纸术对世界的深远影响等关键信息，理解段落主旨和代词指代关系。（学习理解） 根据时间顺序正确排序造纸流程，运用被动语态复述造纸过程，完成对比表格梳理蔡伦造纸前后的变化。（应用实践） 谈论其他中国古代发明及其对世界的影响，探讨伟大发明家应具备的品质，表达个人观点，感悟中国古代科技成就和创新精神。（迁移创新） paper bags book envelops lanterns newspaper magazine notebooks box napkin Papermaking plays an important part in our life. They are all made of paper. Presentation Can we live a life without paper? What will be impossible if if there is no paper? We can’t live easily without paper. We won’t have books, newspapers or magazines. Information will be very hard to spread. Many things will become difficult. Before paper was invented, what did people use to write on? Do you know who improved papermaking in ancient China? Let’s read! According to the title, what may the writer mention? The invention The inventor The inventing process The changes it brings ...... What do you expect to know from this text? Please brainstorm about three questions. ① Who invented/improved papermaking? ② How was paper made? ③ Why is papermaking a world-changing invention? Title: An Invention That Changed the World papermaking The passage is mainly about ____________________. What invention is the text about? an invention What may the passage be about? A. How paper was sold. B. How museums protect paper. C. How books are written. D. How paper was invented and changed the world. An Invention That Changed the World 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. 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. 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 Arab 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. 1 2 3 4 5 1. What’s the type of this passage? A. Narrative （记叙文） B. Exposition （说明文） C. Argumentation（议论文） 2. What’s the main idea of each paragraph? A. Early materials to write on B. Cai Lun’s experiment C. Introduction to the topic D. How paper changed the world E. Cai Lun’s creative idea Part 1(_______): introduction Part 2(_______): problem Part 3(_______): solution Part 4(_______): influence Divide the text into four parts based on the main ideas. para.1 para.2 para.3-4 para.5 Part 1(para.1): introduction Part 2(para.2): problem Part 3(para.3&4): solution Part 4(para.5): influence Identifying text organization Finding main ideas in paragraphs helps understand text organization. 识别文本结构 找到段落主旨有助于理解文本结构。 What’s the structure of this passage? Part 1(para.1): introduction Part 2(para.2): problem Part 3(para.3&4): solution Part 4(para.5): influence C. D. B. A. Common structure about inventions: Problem → Solution → Inflence ( )1. How does the writer introuduce the invention-papermaking? A.By asking a question. B. By giving an example. C.By listing numbers. D.By using sayings 2.It in Paragraph 1 refer to______________________. papermaking A Read Para. 1 , choose the right answer and find out the pronoun refer to. Part 1(para.1): introduction Understanding reference words Noticing what pronouns refer to will help you understand how different parts of the reading are connected. 理解指代词 注意代词到底指代什么，会帮助你理解阅读中不同的部分是怎样联系起来的。 Read Paragraph 2 and complete the table. Question Material to write on before Cai Lun What was it like? What was used to make it? It was either difficult to use and store, or very expensive. Animal bones, bronze ware, stones, wood, bamboo, silk, and an early form of paper made from jute. 1d either...or... 或者...... 或者...... 要么...... 要么...... (materials) (disavantages) Read Paragraph 3 and answer the question. 1b What was Cai Lun’s creative idea? Where did Cai Lun get the idea? From past experiences, Cai Lun got the idea that bark, plants, and old clothes could be used to make a special material suitable to write on. Read Para. 4 again and put the sentences in order _______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. 1 2 3 4 How can we describe the process of papermaking clearly? By using linking words, such as in the first step, then, next, and finally. First, all the ingredients were mixed and boiled in water. Then,the material was beaten, cut up, and mixed with water. Next,the liquid was poured over a bamboo screen, leaving just the fibre. Finally, the fibre was dried and pressed to form paper. Retell the process of making paper in your own words. 动作词链:mix and boil → beat,cut and mix → pour → dry and press Complete the table based on Paragraphs 3 and 4. Question Cai Lun’s paper What was it like? What was used to make it? It was soft, light, easy to make and use, and most importantly, cheap. Bark, plants, and old clothes. 1d Before inventing his paper, Cai Lun noticed the problems with old materials and wanted to make something better. What qualities do you think Cai Lun had? He was observant, creative, and hard-working. 15 Read Para. 5 and answer the question What influences did the papermaking technique bring? It not only speeded up the development of Chinese culture, but also changed civilizations around the world. 、Read Para. 5 and find out what these pronoun refer to. It in Paragraph 5 refer to______________________. it in Paragraph 5 refer to______________________. This in Paragraph 5 refer to______________________. the papermaking techniqu the use of paper and printing a rapid increase in number of books. Tips: Locate pronouns and find matching nouns ahead. Presentation Discuss in groups: 1.What other ancient Chinese inventions do you know? How was the world changed by them? Gun‑powder, the compass and printing. The compass helped people travel and sail across the sea. Gun‑powder changed wars. Printing helped people spread knowledge quickly. These inventions greatly pushed the progress of the whole world. 1f Presentation 1f Discuss in groups: 2.What qualities do you think a great inventor has? Great inventors curiosity observation creativity courage persistence wisdom experience Idea Exploration Reality Patience Courage Presentation Presentation Discuss in groups: What made Cai Lun finally succeed? If there were no Cai Lun’s paper, how might history be different? He had curiosity and careful observation. He kept trying different materials and learned from experience. Also, he was patient and never gave up. People still used expensive or heavy materials to write on. Knowledge spread much more slowly. Fewer books could be created, and cultures could not develop so quickly around the world. 假设你能回到古代，给蔡伦写一张50词左右的感谢便条，说明纸张带来的改变 Homework: Thank-You Note Suppose you could go back to ancient times and write a thank-you note to Cai Lun, explaining the changes brought by papermaking. Dear Cai Lun, thank you for inventing papermaking! Your technique not just speeded up Chinese culture’s development, but changed world civilizations. It spread to neighbours first and reached Europe through Arab countries in the 12th century. Later, paper and printing together increased books rapidly, bringing a new birth of knowledge. We owe today’s world to your great invention—thank you! Presentation 1. 依靠；取决于 ________________________ 2. 对……负有责任；促成 ________________________ 3. 要么...... 要么...... ________________________ 4. 令所有人惊讶的是 ________________________ 5. 因某事而表扬某人 ________________________ 6. 变得对......感兴趣____________________ 7. 导致；引发 ________________________ 8. 造成；带来……结果 ________________________ 9. 不仅...... 而且...... ________________________ 10. ……的数量 ________________________ 11.解决问题_______________________ depend on be responsible for either...or to everyone’s surprise praise sb. for sth. become interested in...  lead to result in not only...but also.... the number of solve the problems 由......制成 ________________________ 来自 ________________________  做某事的方法 ________________________ 适合做某事 ________________________ 切碎 ________________________ ......的使用____________________ 加速，增强 ________________________ ……快速增长 ________________________  被用来做某事...... ________________________  一种……的形式 ________________________ 主管_______________________ made from/of... come from... methods for doing sth./method to do sth. suitable to do sth.... cut up the use of...  speed up a rapid increase in...... be used to do... a form of ... head officer be suitable for sb./sth null 187961.55 $