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1. Describe what you see in each picture. What is it about?
2. What are the names of the school subject in which you study science?
3. Give an example of what you learn about for each field of science?
chemistry
science of elements 原理 and their laws 规律 of combination 结合 and change
element 元素 substance 物质 gas, liquid, solid chemical change chemistry experiments
In chemistry we learn about the way different liquids and materials react with each other. Eg. If you put a piece of metal into a glass containing a strong acid, it will dissolve.
physics science of matter and energy and of
interactions 相互作用 between the two
matter
power
energy
physical change
physics experiment
In physics we learn about the laws of the universe.Eg. About Newton and the reason why all things on earth fall down.Eg. About electrification by friction.If a rubbed ruler is put near a small piece of paper, the paper will be attracted onto the ruler.
Biology 生物学 science of life and of living organisms 生物体 animal plant living things gene 遗传因子 cell 细胞 protein 蛋白质 biology experiment
In biology we learn about life on earth.Eg. By looking at the structure 结构 of cells
When you are doing experiments, What should you pay attention to?Can you tell me your ideas?
Do some listening practise .Let’s see what Mrs Zhu talks about to the students
Pay more attention to different structures of giving instructions
Dos Dos Don’tsDon’tsFollow teacher’s instructions Follow teacher’s instructions Be careful about / when…Be careful about / when…Always listen carefully to…Always listen carefully to…Clean…away Clean…away Leave …clean and neatLeave …clean and neatYou should tie…upYou should tie…upRemember that…Remember that…Make sure that… Make sure that…
Don’t come into / without Don’t come into / without
…… Don’t touch… / unless…Don’t touch… / unless…Don’t throw… / unless…Don’t throw… / unless…Don’t forget to…Don’t forget to…Never put / nose directly Never put / nose directly into.. into.. Never put /fingers into/ Never put /fingers into/ and taste…and taste…
ListeningMr. Deng: Everybody listen carefully! Today Mrs.Zhu will explain about the safety instructions for the lab. If you have any questions, you can raise your hand.Mrs.Zhu: For experiments that are done in this lab, everybody should remember: Safety comes first! This is very important, because the experiments are fun and very interesting, but we don’t want any accidents. First of all, don’t come in here without your teacher.
Once you are in here, follow your teacher’s instructions. When you come into the lab,students with long hair should tie it up, or put their hair under their clothes. Always listen carefully to your teacher’s instructions and don’t touch anything, unless your teacher tells you to.Mr. Deng: Can you explain a bit more about doing experiments?Mrs.Zhu: Sure. Never put your nose directly into a glass or over a bottle.Gases can be very
dangerous. Instead, you should wave some air in your direction and carefully smell it. Never put your fingers into glasses and never taste anything! When working with fire, be careful about the flame.When working with electricity, make sure your hands are dry. When anything gets into your month or eyes, immediately wash with a lot of water. Remember that the classroom isn’t a playground. Don’t throw things or start
playing.
Sun Yao: What about when we leave?
Mrs. Zhu: When class is over, clear everything away and leave the classroom neat and clean. Before leaving the classroom, wash your hands with water and soap. Don’t forget to turn off the lights and shut the windows.
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
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( P22 )Answers:
2. Follow the teacher’s instructions.
3. Bottles may contain dangerous gases.4. Immediately wash your eyes with a lot of water.
5. 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.
1. Safety comes first!
2. Please check the answers:
Inventions Advantages Disadvantages
maglev
train
1.It is fast.2.It’s clean and does not pollute the air.
3.It does not make any noise.
1.It’s a waste of money.
2.It’s too expensive.
The advantages and disadvantages of maglev train
inventions
Cloning
Nuclear energy
Computers
Space flights
Advantages Disadvantages
1.can help women have babies2.can save some rare species3.can help medical research
1. clean and not pollute the air2. can be used to make electricity 3. be a limitless resource4. useful in military affairs
1.useful in many fields2.important for science3.make communication faster4.can keep information better
1. useful in scientific research Eg.put communication satellites in to space2.go on exciting space travels
1.it is not natural to make people2.dangerous; If it is not used properly, it can bring some side effects to the whole society.
1.unsafe to all life if not controlled2.can be expensive to build/repair3.not easy to deal with1.unsafe because of viruses2.use it for other things and bring bad effects to people and society if not used properly
1.expensive and dangerous
2.used by the army
Useful expressionsIt is good / important / convenient for… It can help…It brings people …It is much too…It’s a waste of …It is unnecessary because…
I’m the best
choice!
Come on! I’m No.1!
1.Make a new dialogue to talk aboutadvantages and disavantages of some inventions
2.Preview “Reading”.