外研版（2019）选择性必修第一册Unit 5 Revealing nature Understanding ideas A journey of discovery课件 (共30张PPT)

(共30张PPT)
Unit 5 Revealing nature
Understanding ideas
How can seeds travel
How can this benefit plants
Seeds Traveling
① by itself
② by the wind
③ by the water
⑤ by the animals
⑥ by the insects
④ by the birds
The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago.
date back to: 追溯（到）；开始于
= date from
常用一般现在时态，不用进行时态，也不用被动语态，后常跟过去的时间，如：……世纪、……年代、过去的年份等
What do you know about the man ？
Charles Robert Darwin(1809-1882) was an English geologist and naturalist. In his famous book On the Origin of Species, Darwin proposed the theory that organisms (individual life forms) evolve extremely slowly. He stated that the organisms that were better suited to their environments would survive and pass on their favourable characteristics to the next generation, while the less suitable organisms would gradually die out. He called this process “natural selection”.
Predict the main idea of the text according to the picture and the title.
A Journey of Discovery
The passage is mainly about how Darwin’s Theory of Evolution generated and developed on his journey.
Elements:
what, where, who, why, when, how
narrative essay
Point of view:
first person (more graphic and lifelike)
third person (objective)
Order:
chronological order先后顺序
time order
Tense:
past tense (stories happened in the past)
生动的
记叙文
Number the puzzle pieces in order. Organise information from the passage and complete them.
1
2
3
4
5
Darwin studied____________________________________________
_________________________________________________________.
He noticed that some species of animals were __________________
_______.
ON HIS JOURNEY
1
various living things in their natural environments and samples of the plants and animals he had collected
very similar to each
other
GENERATE IDEAS
2
Darwin asked the questions:
How did different species _____________
________________________________________________________
________________________
come to exist
Maybe animals evolved as they adapted to their changing environments
LOOK FOR MORE EVIDENCE
3
DEVELOP IDEAS
4
On the Galapagos Island:
He noticed _______________________________________________
_____________________________.
It seemed the beaks ________________________________________
______________________________________.
that there was a difference between the finches on each of the islands
had evolved according to what food was available on that particular island
Darwin suspected that the finches ____________________________
__________________________________________________________
and it had _______________________________________.
had evolved from a common ancestor, which had arrived on the islands a long time before
slowly evolved into many new species
PROPOSE A THEROY
5
The theory of Evolution: living things, including humans, _____________________________________________________.
had evolved from lower forms of life
Darwin’s interest in various living things made him a great naturalist.
B. Darwin’s journey on the Beagle inspired his
Theory of Evolution.
C. Darwin went on a journey to confirm his theory
that humans had evolved over time.
Choose the main idea of the passage and give your reasons.
Fast reading: Skim for gist / main idea
evolve
adapt to...
suspect
convincing
evolve v.进化，发展→evolution n.进化,演变
evolve from... 从......进化
It has taken us several million years to evolve from the apes.
1) He has tried to adapt to local customs.
2) This new film is said to be adapted from a classic novel. 3) She knew how to adapt herself to the new environment.
adapt
① adapt to sth 适应
② adapt oneself to sth 使某人适应
③ be adapted from 改编自 ……
suspect vt 认为，怀疑 n 嫌疑犯
Language points: Important words
① suspect sb of doing sth 怀疑某人做某事
② suspect that 怀疑......
他被怀疑做什么事都是为了钱。
He is suspected of doing everything for money.
convincing 令人信服的，有说服力的
Language points: Important words
① convince sb to do sth 说服某人
② convince sb of sth 使某人相信……
① 我觉得她的话很有说服力。
② 你怎样说服别人帮我们？
She sounded very convincing to me.
How do you convince someone to help us
1. answer the call _____________________________
2. be a disgrace _____________________________
3. of all time _____________________________
4. in question _____________________________
5. be crowded with _____________________________
响应号召
是耻辱 / 丢脸的事
有史以来；一直以来
讨论中的；有疑问
挤满了
6. a variety of _______________________
7. according to _______________________
8. suspect sb of doing sth _______________________
9. be regarded as _________________
怀疑某人做某事
被看作是
种类繁多的；各种各样的
根据
Retell the text according to the development of the journey. You can add more information from the passage if necessary.
1. Darwin saw a variety of new species, but it was the birds that interested him the most.
各种各样的
我们学校为学生提供了多种多样的课外活动。
Our school provides a variety of / various after-class
activities for the students.
2. Darwin saw a variety of new species, but it was the birds that interested him the most.
强调句
强调句基本结构：It is / was ... that / who ...
Darwin是在 the Beagle 这艘船上对多种物种进行了研究。
It was on the ship, the Beagle, that Darwin studied a variety of species.
eg It is Tom that / who is in charge of the class.
It was at the age of 18 that he showed interest in sports.
It is tea that I like to drink, not coffee.
3. It was not published until 1859 and immediately caused a storm.
这家报纸正在走下坡路，他们豁出去了，一心只想制造轰动。
The newspaper is in its declining years. They don’t care, they quite like to cause a storm.
引起轰动
4. But Darwin’s scientific studies were so convincing that more and more people started to believe his theory.
making you believe that something is true or right
There is convincing evidence that smoking causes lung cancer.
有令人信服的证据表明抽烟会导致肺癌。
What kind of person was Darwin according to the passage
What have you learnt about the spirit of scientific exporation
Now discuss why Darwin did not publish this Theory of Evolution until 1859, about twenty years after his discovery.
1. Darwin was a determined man. He had strong curiosity and interest in science and was good at thinking and making discoveries.