新教材unit 16.ppt

* * Unit 16 Scientists at work Teaching goals: Talk about science and scientists Practise giving instructions. Learn to write an argumentative essay. Discuss and evaluate Pros and Cons. Astronomical telescope The nature of lightning Question : When you’re doing experiment in a lab, what should you pay attention to ? Student1: We shouldnt’t enter the lab without a teacher. Student2: We should follow the teacher’s instructions. Student3: Don’t touch anything without teacher’s permission. Students: ----- Listening 1. Listen to the tape. Tick the things that Mrs. Zhu talks about. ( ) safety in the lab ( ) gloves ( ) long hair ( ) experiments ( ) shoes ( ) liquids ( ) car accidents ( ) gases ( ) flames √ √ √ √ √ 2. Listen carefully and answer the following questions. （1） What is the most important thing students should remember? Safety comes first! （2） What is the first thing students should do when they come into the lab ? Follow the teacher’s instructions. （3） Why should students be careful smelling from bottles ? Bottles may contain dangerous gases. （4） What is to be done when anything gets into your eyes ? Immediately wash your eyes with a lot of water. （5） What should students do before leaving the lab ? Clear everything away and leave the classroom neat and clean. Wash your hands with water and soap. Turn off the lights and shut the windows. Speaking Example: Building a High-speed Maglev Train fast and clean / it has no wheels and no engine / it doesnt’t make any noise Advantages Disadvantages It’ a waste of money. It’s much too expensive. Space flight Computers Nuclear energy Cloning Disadvantages Advantages Oral practice: Useful expressions Some people will use it for other things. It brings people more comfort. It is unnecessary. It is important for science. It is bad for the environment. It is clean and does not pollute the air. It is dangerous