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(共24张PPT)
Unit 3
The world of science
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Developing ideas；
1. Students can memorize some key words and phrases.
2. Students can get the main idea of this passage.
3. Students can have a broad view of science.
Learning Aims:
draft /drɑ ft/ v. 起草，草拟
declaration / dekl re ( )n/ n. 声明
experiment / k sper m nt/ n. 实验
lightning / la tn / n. 闪电
fiction / f k ( )n/ n. 虚构的事
metal / metl/ n. 金属
attach / t t / v. 系，绑；贴
flash /fl / n. 闪光
conduct /k n d kt/ v. 传导
scientific / sa n t f k/ adj. 科学的
entirely / n ta li/ adv. 完全地
gravity / ɡr v ti/ n. 重力，引力
account / ka nt/ n. 记述，描述
proof /pru f/ n. 证明，证据
Key words
instead of 代替：而不是
fly a kite 放风筝
a form of 一种形式
tie to 把...系在
be attached to 把...附属于
more than one 不止一个
along with 与...一起
be amazed to 对...感到惊讶
in fact = actually 事实上
contribute towards 有助于；给...捐钱
an approach to doing sth 做某事的方法
neither...nor... 既不...也不
come up with 想出
take place 发生
establish the truth\fact 确立事实
die from 死于（外因）
there is no proof that 毫无证明
even if 即使
Useful expression
1.scientific adj. 科学的
science n.科学
scientist n.科学家
2.electrcity n.电
electric adj.电的
3.bravery n. 勇气；勇敢
brave adj. 勇敢的
4. prove v. 证明
proof n. 证明；证据
5.admittedly adv. 诚然；不可否认的是
admitted adj。 公认的
admit v. (勉强)承认
Benjamin Franklin (1706–1790) was one of the Founding Fathers of the United States and helped draft the Declaration of Independence and the US Constitution. Apart from being a successful statesman, he was also well known as a leading American author, printer and publisher, successful diplomat, creative scientist and inventor.
作者介绍:
What is the text mainly about
A
A. The story of Franklin's experiment is true or not.
B. The aim of Franklin's experiment.
C. The procedure of Franklin's experiment.
D. The effect of Franklin's experiment.
3.Number the statements to show how people's attitudes towards Franklin's experiment have changed.
Franklin's spirit of scientific exploration is still considered an inspiration.
People are amazed at and inspired by Franklin's experiment.
Scientists question what really happened in Franklin's experiment.
1
2
3
Read the passage and find out what Franklin’s experiment aimed to prove.
FRANKLIN’S
EXPERIMENT:
How Much Is True
1.Benjamin Franklin’s famous experiment with lightning has introduced generations of children to science.However, new research suggests that the story may be fiction instead of fact.
2.The well-known story is that the American Founding Father and scientist flew a kite during a storm in 1752. At that time, there was much interest in electricity. People wanted to know if lightning was really produced by electricity or something else. Franklin was one of them. He raised the kite with a piece of string tied to it.
1.fly a kite 放风筝
2.At that time在那时
3.be interested in... 对...感兴趣
4. tie to 把...系在
the teacher and writer. 老师兼作家（指同一人）
A metal key was attached to the string. A flash of lightning hit the kite, and electricity was conducted through the string to the key. Franklin then touched the key with his finger and got an electric shock. This, he said, proved that lightning was a form of electricity.
1.A flash of lightning 一道闪电
2.be attached to 附属于
3.a form of ...一种形式
4. electricity n. 电
electric adj 电的
What Franklin’s experiment aimed to prove
To prove that lightning was a form of electricity.
3 For many years, schools have taught the story of Franklin’s lightning experiment. More than one generation of schoolchildren has been amazed by his bravery and his scientific approach to looking for the truth. Franklin, along with many other scientists, has inspired us and taught us that scientific experiments are important in order to establish the truth and to contribute towards later scientific discoveries and inventions.
1.be amazed by...对...吃惊
2.along with 与...一起
3.an approach to doing sth 做某事的方法
4.in order to 为了...
5. contribute towards 有助于；给...捐款
more than one 不止一个，其引导的短语作主语时，谓语动词用单数形式。
当along with (as well as, but, except, together with 等)连接几个名词作主语时，谓语动词的单复数与前面的名词单复数保持一致，即“就远原则eg: Tom, as well as his parents, goes to the park every Sunday.
4. However, neither the story nor the details of the experiment are entirely true. Although it has been proved that Franklin’s experiment took place, more than one scientist has questioned what really happened. The detail about the string and the key is true. But scientists all agree that if Franklin had actually touched the key, he would certainly have died from the electric shock.
1.take place 发生
2.die from...死于...
neither...nor...“既不...也不”， 连接短语作主语时，谓语动词的单复数采用“就近原则”
5 Scientists often question accepted ideas because they want to establish the facts. Some have even questioned the story about the apple that fell on Newton’s head and led him to come up with his theory of gravity. In fact, more than one account suggests that while Newton was certainly inspired by a falling apple, there is no proof that it hit him on the head.
1.come up with 想出
2.there is no proof that 毫无证据...
3.fall on 落到
4. be inspired by被激励...
5. prove v. 证明
proof n. 证明；证据
D
What is the effect of the experiment
A. It has introduced generations of children to science.
B. It proved that lightning is a form of electricity.
C. It is important to establish the truth.
D. All of the above.
6 Admittedly, fiction is often more interesting
than the truth. People have been more inspired
by Franklin’s spirit of scientific exploration
than by the facts themselves. But in science,
facts should be proved by experiments and
research, and we should not always believe
everything we read or hear – even if it is a
great story.
1.Admittedly 诚然;应当承认
2.even if 即使
3.be proved by被证实...
Brainstorming:
What does the author think have more inspired people
A. The story of scientists' experiments.
B.The result of scientists' experiments.
C. The scientists' spirit of scientific exploration.
D. The fact of scientific exploration.
C
1.perseverance
2.creative
3.optimism
What qualities do you think a great scientist should have
In what ways do scientists contribute to society
contributions
Firstly, scientific discoveries promote the development of our society.
Secondly, the contributions of scientists in medicine extend our life span.
Thirdly, scientists have invented a lot of surprising tools that improve our living standards.
Thank you!

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