Unit 5 Section A 3a-3d 课件 2026-2027学年人教版英语九年级上册

Unit 5 Power of Ideas Lesson 3 Section A 3a–3d 1 1. Let’s review. • What are these things used for / to do? The mobile phone is used to contact people and surf the internet. The camera is used to record important moments. • Which of them do you think is the most useful to you? 2 2. Listen and answer the question. What does Peter think is the most useful invention of all time? Peter thinks the radio is the most useful invention of all time. a piece of electronic equipment used for listening to radio broadcasts a system of sending sound over a distance by transmitting electrical signals without wires 3 3. Scan the conversation. What information about the radio is mentioned in the conversation? The inventor, the time of its invention, and its effect. Invention: the radio Who was the inventor? When was it invented? How did it change the world? 4 4. Read the conversation and complete the chart. Who was the inventor? When was it invented? How did it change the world? • • • Peter: Yeah. And because of the radio, some other important inventions were developed as well. Fu Xing: Like the television? Peter: That’s right. It also had a big effect on music. The radio made it much easier for people to enjoy music from artists around the world. An Italian inventor called Guglielmo Marconi. In the 1890s. It made the world much smaller. It led to other important inventions, like the television. It made it much easier for people to enjoy music from artists around the world. Invention: the radio signal words for more information 5 5. Read again and answer the questions. (1) How does Fu Xing keep the conversation going? Fu Xing: What do you think is the most useful invention of all time, Peter? Peter: It has to be the radio. Fu Xing: The radio? Why? Peter: Before the radio was invented, information travelled very slowly. The world was made much smaller by the radio. Suddenly, news could be spread around the world in seconds. Fu Xing: Right. Who was the inventor? Peter: An Italian inventor called Guglielmo Marconi. He developed the idea in the 1890s. In 1901, a radio message was sent across the Atlantic Ocean for the first time. Fu Xing: Wow! That was quite a distance at that time. Peter: Yeah. And because of the radio, some other important inventions were developed as well. Fu Xing: Like the television? Peter: That’s right. It also had a big effect on music. The radio made it much easier for people to enjoy music from artists around the world. By asking follow-up questions. By giving comments. 6 5. Read again and answer the questions. (2) What does Peter mean by saying “it has to be the radio”? Peter believes that the radio is the most useful invention of all time, and there is no match for that. (3) What does Peter mean by saying “the world was made much smaller”? Before the radio was invented, information travelled very slowly. People sent letters by foot, horse, ship, and train. With the help of the radio, news could be spread around the world without wires. In other words, the world didn’t become smaller in physical terms, but the radio helped to speed up the travelling of information and connect people. 7 5. Read again and answer the questions. (4) How could the radio lead to other important inventions like the television? Radio offers a way to send information (sound) across distances without wires. TV developed this idea: send both sound and moving images over the same kind of radio waves. (5) Why is the effect on music worth mentioning? As an important form of entertainment and culture, the effect on music shows that the radio is not only useful in communication, but also in daily entertainment. It proves that the radio is indeed an important invention. 8 6. Listen to the conversation. Pay attention to how the key information is stressed. Fu Xing: What do you think is the most useful invention of all time, Peter? Peter: It has to be the radio. Fu Xing: The radio? Why? Peter: Before the radio was invented, information travelled very slowly. The world was made much smaller by the radio. Suddenly, news could be spread around the world in seconds. Fu Xing: Right. Who was the inventor? Peter: An Italian inventor called Guglielmo Marconi. He developed the idea in the 1890s. In 1901, a radio message was sent across the Atlantic Ocean for the first time. Fu Xing: Wow! That was quite a distance at that time. Peter: Yeah. And because of the radio, some other important inventions were developed as well. Fu Xing: Like the television? Peter: That’s right. It also had a big effect on music. The radio made it much easier for people to enjoy music from artists around the world. Key information • New information • Contrastive information • Names of persons • Names of places • Numbers 7. Role-play the conversation and check ( ) the items according to the checklist. How well can you do these things? Very well OK Needs work I can speak loudly, clearly, and smoothly. I can speak at a proper speed. I can pronounce the words correctly. I can pay attention to sentence stress, intonation, and pauses. I can cooperate with my partner well. 8. Challenge yourself and fill in the blanks according to 3a. Peter thinks the radio is the most useful invention of all time. It by an Italian inventor called Guglielmo Marconi. He in the 1890s. In 1901, a radio message across the Atlantic Ocean for the first time. Before that, information travelled very slowly. But the world by the radio. Suddenly, news could around the world in seconds. And because of the radio, some other important inventions as well, like the television. It also had a big effect on music. The radio for people to enjoy music from artists around the world. was invented developed the idea was sent was made much smaller be spread were developed made it much easier the inventor To introduce an invention the time the effect 9. Think further. (1) What other effects does the radio have? • It helped schools and teachers reach students in remote areas. • People could learn languages, history, or science without leaving home. • During war or big events, it allowed people to communicate quickly. (2) What qualities do you think Guglielmo Marconi had to invent the radio? • He was creative, as he thought of inventing something completely new. • He was determined, as it took him almost ten years to succeed. (3) What else would you like to know about the radio or the inventor? How Marconi got the idea, what challenges he met, how the radio was invented, etc. 12 10. Choose another invention that you think is the most important and make a mind map about it. Then describe it to a partner. Invention: Who was the inventor? How did he / she get the idea? What challenges did he / she meet? When was it invented? How did it change the world? 13 11. Use the checklist to evaluate your performance. How many points can you get? Checklist Criteria Points (1–5) Describe the invention and the effect clearly (清晰描述发明创造及其影响) Speak correctly and fluently (正确且流畅地表达) Use proper facial expressions and gestures (使用面部表情和肢体语言) 14 Homework Do a survey in your class and find out what your classmates think are the most important inventions. Then get prepared to present the results to the class. 15 Other 71208.93 $