(
课件网) Unit 4 Amazing Science Topic 1 When was it invented Section D Warming up Talk about your inventions in pairs. When was it invented What is it made of/from What is it used for … E.g. A: When was your invention invented B: It was invented .... A: What’s it made of/from B: It’s made of/from.... A: What’s it used for B: It’s used for.... Among the following new inventions, which one can help us find the way Warming up A B C Pre-reading Vocabulary n.探险者，勘探者 n.标示；记号；符号 v.做记号，做标记 n.体系，方法，制度 adj.人造的；非天然的 explorer mark system man-made Pre-reading Before the GPS was invented, how could people find out where they were By using the stars. While-reading Activity1: Read Para1 and fill in the blanks. Using the stars. People_____ where they were. This method worked well at night _____ the weather was good. It _____ during the rest of the time. could find out as long as didn't worked so well While-reading Activity2: Read Para2 and finish the mind-map. The GPS It is like a _____ We can use it at_____, in _____ and in _____ to find out our position. It can also _____ study the shape of the earth. The GPS is a _____that helps us explore our planet and discover where we are. man-made star be used to any place any time any weather great invention While-reading Activity3: Read the passage and answer the questions . 1. How did the early explorers know where they were They found out where they were by using stars. 2. What’s the disadvantage of using the stars as guiding marks It didn’t work well when the weather was bad and the stars could not be seen. While-reading Activity3: Read the passage and answer the questions . 3. What is the GPS like 4. Is the GPS useful It is like a man-made star. Yes, it is. Post-reading 根据课文内容，完成以下的短文。 Thanks to GPS, we can exactly know _____we are now. GPS is like a man-made “star”. It can be _____ in any place and any weather condition to _____ out our position . In the past, the early explorers had to use stars in the _____ to tell them where they were, however, this method didn’t work well when the weather was bad. So GPS is a great _____ that can help humans to explore our planets better. where used find sky invention Listen to the passage and follow it in a low voice. Grammar Passive Voice (Ⅱ) The radio was invented by Guglielmo Marconi in 1895. When was the digital camera developed Where was it developed What is a rocket used for It was developed in the 1970s. It was developed in Japan. It is used for sending satellites or spaceships into space. Passive voice was /were +done （一般过去时的被动语态） 1. A big supermarket _____in our city last year. A. is built B. were built C. was built 2.Could you tell me who the radio ____ by A. invents B. invented C. was invented 3. Many trees and flowers _____ in our school last year.They made our school more beautiful. A. have planted B. were planted C. planted Passive v ... ...
