Unit 5 第2课时 Section A 3a-3d-【七彩课堂】2026-2027学年九年级上册英语同步课件（人教版·新教材）

right? Who was the inventor? An italian inventor called the yellow mark ony. He developed the idea in the nineteen nineties. In nineteen, no one, a radio message was sent across the atlantic ocean for the first time. Wow, that was quite a distance at that time. yeah. And because of the radio, some other important inventions were developed as well. like the television. That's right. IT also had a bier effect on music. The radio made IT much easier for people to enjoy music from artists around the world. Section a activity three c listen to the conversation, pay attention to how the key information is stressed, then role play the conversation. What do you think is the most useful invention of all time? Peter IT has to be the radio. The radio. Why, before the . radio was invented, information traveled very slowly. The world was made much smaller by the radio. Suddenly, news could be spread around the world in seconds. right? Who is the inventor? An italian . inventor called guyer mocco y. He developed the idea in the eighteen nineties. In nineteen, no one a radio message was sent across the atlantic ocean for the first time. Well, that was quite a distance at that time. yeah. And because of the radio, some other important inventions were developed as well. like the television. 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. Section A 3a-3d Unit 5 Power of Ideas To learn the words and expressions. To read 3a and complete 3b. To retell when and how radio was invented. If you like, you can talk more about radio. Objectives car Karl Benz in 1885 calculator in 1971 What is it? Who and when was it invented … telephone in 1876 TV in 1927 Karl Benz Do you know who these inventors are? Alexander Bell J. L. Baird Can you match the inventions with the right inventors? Read the conversation. What does Peter think is the most useful invention of all time? 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. 3a Fu Xing: Right. Who was the inventor? Peter: An Italian inventor called Guglielmo Marconi. He developed the idea in the 1890s.In 190l,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. 3b Read again and complete the chart. Invention: Who was the inventor? When was it invented? How did it change the world? radio Guglielmo Marconi. In 190l, a radio message was sent across the Atlantic Ocean for the first time. Because of the radio some other important inventions were developed as well. The radio made it much easier for people to enjoy music from artists around the world. The world was made much smaller by the radio. 3c Listen to the conversation. Pay attention to how the key information is stressed. Then role-play the conversation. 3d Choose another invention that you think is the most important and make a mind map about it. Then describe it to a partner. Brilliant Inventions Made by Accident Greatbatch was a lifelong inventor. In the 1950s, he worked as a medical researcher. He was building an oscillator (振荡器) to record heart sounds when he pulled the wrong resistor out of a box. When he assembled his device, it began to give off a rhythmic electrical pulse. It was then he realized his invention could be used as a pacemaker (起搏器). 拓展阅读 It also had a big effect on music. 它对音乐也产生了很大的影响。 have/has a big effect on … 对……有重大影响 have a good effect on 对…… 有好影响 have a bad effect on 对…… 有坏影响 Weather has an effect on crops. 天气对农作物有影响。 Language Points 12 The new rule will have ______ great effect ______ our daily life. The pollution has ______ effect on the environment. a on an Exercise Homework Read 3a. Remember the phrases of 3a. 伴你成长 $Read the conversation. What does Peter think is the most useful invention of all time? What do you think is the most useful invention of all time? Peter IT has to . be the radio. The radio. why? Before the radio . was invented, information traveled very slowly. The world was made much smaller by the radio. Suddenly news could be spread around the world in seconds.