unit 16 Warming up and speaking-PPT课件
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原理：把两块磁铁相同的一极靠近，它 们就相互排斥，反之，把相反的一极靠近， 它们就互相吸引。托起磁悬浮列车的，那似 乎神秘的悬浮之力，其实就是这两种吸引力 与排斥力。
国际上磁悬浮列车有两个发展方向。一 个是以德国为代表的常规磁铁吸引式悬浮系 统－－EMS系统，利用常规的电磁铁与一般铁 性物质相吸引的基本原理，把列车吸引上来， 悬空运行，悬浮的气隙较小，一般为10毫米 左右。常导型高速磁悬浮列车的速度可达每 小时400-500公里，适合于城市间的长距离快 速运输；另一个是以日本的为代表的排斥式 悬浮系统－－EDS系统，它使用超导的磁悬浮 原理，使车轮和钢轨之间产生排斥力，使列 车悬空运行，这种磁悬浮列车的悬浮气隙较 大，一般为100毫米左右，速度可达每小时 500公里以上。
down.
h
6
What can you learn in Biology ?
In biology we learn about life on earth, for example by looking at the structure of cells.
h
7
• Match the celebrities with their field
Japan
Germany
Maglev Train
Pros: 1. It’s very fast. People can
travel from Beijing to Shanghai
in a few hours.
2. It’s clean and it doesn’t make
any noise….
Nuclear energy
Space computers Flights
h
9
Fast Clean Quiet
Expensive
磁悬浮列车是一种采用无接触的电磁悬 浮、导向和驱动系统的磁悬浮高速列车系统。 它的时速可达到500公里以上，是当今世界最 快的地面客运交通工具，有速度快、爬坡能 力强、能耗低运行时噪音小、安全舒适、不 燃油，污染少等优点。磁悬浮技术利用电磁 力将整个列车车厢托起，摆脱了讨厌的摩擦 力和令人不快的锵锵声.
Albert Einstein Steven Hawking
chemistry
Madame Cruie
Darwin
Physics
Li Zhengdao
Thomas Edison
Newton
h
biology
8
Maglev train
Speaking
Cloning
Advantages and Disadvantages
h
16
Nuclear energy
Advantages
Disadvantages
1. Can make all the 1. Unsafe to all life electricity that we if not controlled
need
2. Can be expensive
2. Is a limitless resource
3
What do you learn in Chemistry ?
In chemistry we learn about the way different liquids and materials react with each other.
h
4
This photo shows an English book called Hamlet, a dictionary and a notebook. English is a useful tool in the acadh emic field of science. 5
Cons: 1. It’s a waste of money. It’s much too
expensive.
2. The money
would be better spent building more roads
or railways in other hparts of China…. 14
Clone– (any of a )group of plants or organisms produced asexually from one ancestor.
1. Unsafe because of viruses
2. difficult to control when something goes wrong
3. Can keep information 3. Make more problems
better
4. can do things
than they solve such as indulgence in
2. Put communication 3. if something
satellites in space
goes wrong,
3. shows the power of a
it’s difficult to help or rescue
country
h people …
19
再 见 ］
再见
h
20
to build/ repair
3. produce very
3. do not pollute the
dangerous waste …
environment …
h
17
Computers
Advantages
Disadvantages
1. Make communication faster
2. make work/ travel safer
What do you learn in physics ?
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
faster than
computer games …
people…
h
18
Space flights
Advantages
Disadvantages
1. Make research 1. Expensive and
of outer space
dangerous
possible
2. Used by the army
Unit 16 Scientists at Work
h
1
What are the subjects in which you learn science ?
Science
physics
chemistry
h
biology
2
in a chemistry lab
doing an experiment
h
h
15
Cloning
AdvantagesΒιβλιοθήκη Disadvantages
1. Can help some women have babies
2. Can help medical research
1. It is not natural to make people.
2. Dangerous; people use it to do strange things
国际上磁悬浮列车有两个发展方向。一 个是以德国为代表的常规磁铁吸引式悬浮系 统－－EMS系统，利用常规的电磁铁与一般铁 性物质相吸引的基本原理，把列车吸引上来， 悬空运行，悬浮的气隙较小，一般为10毫米 左右。常导型高速磁悬浮列车的速度可达每 小时400-500公里，适合于城市间的长距离快 速运输；另一个是以日本的为代表的排斥式 悬浮系统－－EDS系统，它使用超导的磁悬浮 原理，使车轮和钢轨之间产生排斥力，使列 车悬空运行，这种磁悬浮列车的悬浮气隙较 大，一般为100毫米左右，速度可达每小时 500公里以上。
down.
h
6
What can you learn in Biology ?
In biology we learn about life on earth, for example by looking at the structure of cells.
h
7
• Match the celebrities with their field
Japan
Germany
Maglev Train
Pros: 1. It’s very fast. People can
travel from Beijing to Shanghai
in a few hours.
2. It’s clean and it doesn’t make
any noise….
Nuclear energy
Space computers Flights
h
9
Fast Clean Quiet
Expensive
磁悬浮列车是一种采用无接触的电磁悬 浮、导向和驱动系统的磁悬浮高速列车系统。 它的时速可达到500公里以上，是当今世界最 快的地面客运交通工具，有速度快、爬坡能 力强、能耗低运行时噪音小、安全舒适、不 燃油，污染少等优点。磁悬浮技术利用电磁 力将整个列车车厢托起，摆脱了讨厌的摩擦 力和令人不快的锵锵声.
Albert Einstein Steven Hawking
chemistry
Madame Cruie
Darwin
Physics
Li Zhengdao
Thomas Edison
Newton
h
biology
8
Maglev train
Speaking
Cloning
Advantages and Disadvantages
h
16
Nuclear energy
Advantages
Disadvantages
1. Can make all the 1. Unsafe to all life electricity that we if not controlled
need
2. Can be expensive
2. Is a limitless resource
3
What do you learn in Chemistry ?
In chemistry we learn about the way different liquids and materials react with each other.
h
4
This photo shows an English book called Hamlet, a dictionary and a notebook. English is a useful tool in the acadh emic field of science. 5
Cons: 1. It’s a waste of money. It’s much too
expensive.
2. The money
would be better spent building more roads
or railways in other hparts of China…. 14
Clone– (any of a )group of plants or organisms produced asexually from one ancestor.
1. Unsafe because of viruses
2. difficult to control when something goes wrong
3. Can keep information 3. Make more problems
better
4. can do things
than they solve such as indulgence in
2. Put communication 3. if something
satellites in space
goes wrong,
3. shows the power of a
it’s difficult to help or rescue
country
h people …
19
再 见 ］
再见
h
20
to build/ repair
3. produce very
3. do not pollute the
dangerous waste …
environment …
h
17
Computers
Advantages
Disadvantages
1. Make communication faster
2. make work/ travel safer
What do you learn in physics ?
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
faster than
computer games …
people…
h
18
Space flights
Advantages
Disadvantages
1. Make research 1. Expensive and
of outer space
dangerous
possible
2. Used by the army
Unit 16 Scientists at Work
h
1
What are the subjects in which you learn science ?
Science
physics
chemistry
h
biology
2
in a chemistry lab
doing an experiment
h
h
15
Cloning
AdvantagesΒιβλιοθήκη Disadvantages
1. Can help some women have babies
2. Can help medical research
1. It is not natural to make people.
2. Dangerous; people use it to do strange things