Unit 16 Scientists at work Period1 Warming up & listening academician President of Zhejiang University "Father of China's Aerospace" Director of the Guangzhou Institute of Respiratory Diseases

Scientist is a person who has expert knowledge of one or more sciences. (especially gained through experience).

physics chemistry biology Darwin Steven Hawking Li Zhengdao Thomas Edison Albert Einstein Newton Madam Curie Alfred Nobel Can you match the scientist and the field of science?

British theoretical physicist Hawking is confined to a wheelchair and is unable to speak without the aid of a computer voice synthesizer.

If you want to learn the science subjects well, what else should you do besides the class learning? Through a microscope We can learn the subjects well by ________.

Describe what you see in each picture. What is it about? …students at work in a chemistry lab …students at work in a physics lab …students looking at something through a microscope

What are the subjects in which you learn science? What can you learn in your science classes? Science physics chemistry biology

In chemistry we learn about the way different liquids and materials react with each other. back

In physics we can learn about the laws of the universe, for example about Newton and the reason why all the things on earth fall down. back

In biology we learn about life on earth, for example by looking at the structure of cells. back

Do you often do experiments in the chemistry, or physics or biology lab? What do you have to be careful with in a lab? Before listening

Do you still remember what your teacher often remind you before, when and after you do an experiment? Listen to what Mrs. Zhu is talking to his students for the first time, focusing on the subjects mentioned in the passage. Flames Safety in the lab Experiments Long hair Gases

1.______comes first! 2.______the teacher’s____________. Don’t come in __________________. Students with long hair should _____it ___.Always _______________ your teacher’s instructions and don’t _____ anything _____ your teacher tells you to. Listen to the tape for the second time to write down some key words. Before the experiment: Safety Followinstruction without your teacher tie uplisten carefully to touch unless

During the experiment 1. can be very dangerous. You should and carefully it. Never anything. 1.Be careful about the. 2.When working with,make sure your hands are. 3.When anything gets into your mouth or eyes, immediately your eyes. 4.Don’t things or start playing. Gases wavesmelltaste flame electricity dry wash with a lot of water throw

After the experiment everything and the classroom and clean. your hands with water and. the lights and the windows. Clear awayleave neat Washsoap Turn offshut

Safety comes first! Please check the answers: (1)What is the most important thing students should remember? (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? Because 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 window.

DOSDON’TS Follow / teacher’s /instructionsDon’t come into / without … Be careful about / when…Don’t touch… / unless… Always listen carefully to…Don’t throw… / unless… Clean…away and leave …clean and neat Don’t forget to… You should tie…upNever put / nose directly into… Remember that…Never put /fingers into/ and taste… Make sure that… Now list what you can do and can’t do in a lab as much as possible.

Knowing the rules in a lab is very necessary for the sake of our safety. Suppose you are a teacher and you are going to make an announcement to your students to give them some instructions before an experiment.

1.It suddenly starts raining with thunder and lighting.What are the things you should do and what are the things you should not do? 2.You want to do a science experiment in a physics class. Remember the safety instructions from the physics lab and practise them in English. 3.You want to go on a hiking trip in the mountains. What are the things you should do and what are the things you should not do? 4.You want to do a science experiment in a chemistry class. Remember the safety instructions from the chemistry lab and practise them in English. Situations:

Situation1: You are in a thunderstorm Dos: If you are outdoors, go home or to a safe place as quickly as possible. Stay indoors if you are at home. Close the windows if you are in a car. Keep your body low to the ground. --- Don’ts: Don’t shelter in small buildings. Don’t stand under trees. Don’t use electrical machines. Don’t take a bath or shower. --- back

Physics experiment Dos: Be on time before the experiment starts. Carefully follow all instructions. Check all the instruments to see if they are OK. Keep the lab clean. --- Don’ts: Don’t’ touch the instruments before the experiment starts. Don’t leave the lab without the teacher’s permission. Don’t take anything from the lab. --- back

Hiking trip Dos: Wear good shoes and clothes. Bring a backpack. Tell someone else where you are going. Bring water and a map. Watch out for dangers such as snakes. Wear a hat Bring a cell phone. --- Don’t s: Don’t go alone. Don’t take unsafe roads. Don’t go on if you aren’t felling well. --- back

Chemistry experiment Dos: Keep chemicals and instruments in order. Keep quiet in the lab. Take good care of the instruments in the lab. Keep the instruments clean and dry. --- Don’ts: Don’t speak loudly. Don’t walk around if you don’t have to. Don’t be late for the experiment. Don’t start without the teacher’s permission. --- back

“My belief is that if you do good science,science will take care of you.” ２００３年诺贝尔化学奖 美国科学家彼得 · 阿格 雷和罗德里克 · 麦金农

1. Have a discussion to find out the best rules for the lab and recommend it to the school leader. 2. Have a face-to-face interview with the prize winners or tutors (about science festival). 3. Preview Speaking and try to search for some information about the new inventions and discoveries. Homework:

Game: What equipment will you choose if you are asked to do experiment in a lab. chemistry physics biology PH indicator flask test tube litmus paper reagent stirring robfilter magnetengine condenser electric wire voltmeter amperemeter sample burette dissector microscope nipper pieces of glass