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1、Unit16 Scientists at Work 科学家在工作科学家在工作Warming Up :1.Describe what you see in each picture .What is it about?1.Photo1 shows students at work in a chemistry lab.2.Photo2 shows an English book called Hamlet, a dictionary and a notebook.3. Photo3 shows two students doing an experiment.4.Photo4 shows stu
2、dents looking at something through a microscope.2.What are the names of the school subjects in which you study sciences.1.Chemistry 2.Physics3.Biology 3.Give an example of what you learn about for each field of science.举一个例子，说明你在每个科学领域中举一个例子，说明你在每个科学领域中学习的内容。学习的内容。In chemistry we learn about the way
3、 different liquids（液体）液体） and materials react（反映）反映） with each other. For example, if you put a piece of metal into a glass containing a strong acid（酸）（酸）, it will dissolve（溶解）（溶解）.2.In physics, we learn about the laws of the universe（宇宙）（宇宙）, for example about Newton and the reason why all things o
4、n earth fall down.3. In biology we learn about life on earth, for example by looking at the structure of cells（细胞）（细胞）. Review:evaluate science pros scientistcons liquidformation lab experiment essay评价，评估评价，评估赞成赞成反对反对形成，结构形成，结构实验实验科学科学科学家科学家液体液体实验室实验室文章、短文文章、短文Listening:( difficult points)Why should
5、 students be careful smelling from bottle?be careful doingbe careful doing的意思是的意思是”做某事仔做某事仔细或小心细或小心”, be careful , be careful 后面常跟后面常跟withwith, , in, aboutin, about等介词短语等介词短语, , 也可跟也可跟 to doto do或或从句从句. . 为什么学生在闻从瓶子里冒出来的气味为什么学生在闻从瓶子里冒出来的气味时要小心时要小心? ?大家对自己说的话应该很谨慎大家对自己说的话应该很谨慎. .要小心把药在安全的地方要小心把药在安全的地
6、方, , 不要让小孩拿到不要让小孩拿到. .people should be more careful about the things they say.Be careful that the medicine is kept away from children.那些盘子那些盘子, ,要十分小心要十分小心You must be careful with those plates!You must be careful who you accept a lift from 搭乘谁的车要小心搭乘谁的车要小心. .如果你眼睛里进了东西如果你眼睛里进了东西, ,该怎么该怎么办办? ?“be+ to
7、 do”“be+ to do” 结构表示安排、命令、结构表示安排、命令、职责、义务、目的、用途、可能性、职责、义务、目的、用途、可能性、命中注定等命中注定等. .What is to be done when anything gets into your eyes?We are to meet at the school gate.You are to be back by 10 oclock.我们约定在校门口碰头。（安排）我们约定在校门口碰头。（安排）你得在你得在1010点钟前回来。（命令）点钟前回来。（命令）我谨通知你会议在杭州举行。我谨通知你会议在杭州举行。( (职责）职责）刀是用来切
8、割的。（用途）刀是用来切割的。（用途）I am to inform （通知）（通知）you that the meeting will be held in Hangzhou.A knife is to cut with.他们注定以后永远不再见面。（命他们注定以后永远不再见面。（命中注定）中注定）They were never to meet again.Listening Text:Mr Deng: Everybody listen carefully! Today Mrs Zhu will explain about the safety instructions（安全说明安全说明） fo
9、r the lab. If you have any questions you can raise your hand（举手举手）. Mrs Zhou: For experiments that are done in this lab, everybody should remember: Safety comes first! （安全第一）（安全第一）This is very important ,because the experiments（实验实验） are fun and very interesting , but we dont want any accidents.（事故）
10、（事故）First of all（首首先）先）, dont come in here without your teacher. Once （一旦一旦）youre in here, follow your teachers instructions（说明说明）. When you come into the lab, students with long hair should tie it up（把它系起来把它系起来）, or put their hair under their clothes. Always listen carefully to your teachers instru
11、ctions and dont touch anything, unless your teacher tells you do.Mr Deng: Can you explain a bit more about doing experiments?Mrs Zhu: Sure .Never put your nose directly(径直地径直地） into a glass or over a bottle. Gases（气体气体） can be very dangerous. Instead, you should wave （波动、挥舞波动、挥舞）some air in your dir
12、ection （方向方向）and carefully smell it .Never put your fingers into glasses and never taste anything! When working with fire, be careful about the flame（火焰）. When working with electricity（电）. Make sure your hands are dry（干的）. When anything gets into your mouth or eyes, immediately（立即） wash with a lot o
13、f water. Remember that the classroom isnt a playground（操场）. Dont throw （扔）things or start playing . That can be dangerous.Sun Yao: What about when we leave?Mrs Zhu: When class is over, clear everything away（清走） and leave the classroom neat（整洁） and clean. Before leaving the classroom, wash your hands with water and soap（肥皂）. Dont forget to turn off （关掉）the lights and shut （关闭）the windows.
