unit 16 scientist at work listening and speaking-PPT课件.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 youre doing experiment in a lab, what should you pay attention to ?,Student1: We shouldntt enter the lab without a teacher.,Student2: We should follow the teachers instructions.,Student3: Dont touch anything without teachers 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 teachers 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 doesntt make any noise,Advantages,Disadvantages,It a waste of money. Its much too expensive.,Oral practice:,Useful expressions,Useful / help medical research / save some rare species so that many animals will not die out.,Dangerous and unnecessary / unnatural / people look the same /,Cloning,Nuclear energy,The best way to make electricity instead of coal and oil / limitless resource / clean and doesntt pollute the air / cheap and good for the economy / used in military affairs (军事）,Nuclear waste is dangerous for peoples health and environment / expensive to build and keep functioning safely / unnecessary,Computers,make communication faster and store much information / important for science / good for economy / easy and useful in many respects,make people lazy / be into computer games / virus(病毒）/ have bad effects on people and society,Space flights,Interesting and exciting / be useful for scientific research on outer space,