外研版（2019）选择性必修 第一册Unit 5 Revealing nature Understanding ideas 课件(共29张PPT)

(共29张PPT)
Unit 5　
Revealing nature
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Understanding ideas
1. Students could learn some words and phrases.
2. Students could get the main idea of this passage.
3. Students could write some sentences about this topic.
Learning Aims:
What is your understanding of the title of this unit？
Share you ideas with others
揭示自然的秘密
Revealing nature
Before reading, please try to make a prediction of this unit.
Brainstorming:When learning this part,what comes to your mind
1. animals
2. plant
3...
Try to write your opinions in your notebook!
What is the main purpose
of this paragraph
1 The captain of the ship, the Beagle, wanted
someone who would “profit by the opportunity
of visiting distant countries yet little known”.
The person who answered the call was not the
captain’s first choice. It was a young man who
had left medical school without completing his
degree. What’s more, he had recently received
a letter from his father predicting that he
would be “a disgrace to yourself and all your
family”. Despite all this, his adventures on this
ship would lead to one of the most important
scientific discoveries of all time.
To introduce a topic.
Take notes quickly.
重点词汇
profit by 获益于
first choice 首选 ; 第一选择
lead to 导致 ; 通向
one of …之一
most important 重要的 ; 有重大影响的 ; important的最高级
of all time 有史以来；
2 The young man in question, Charles Darwin,
was a geologist and naturalist, fascinated by
rocks, plants and animals. He left England on
the ship, the Beagle, in 1831. The journey gave
him the chance to study various living things in
their natural environments. After Darwin had
spent some time in South America, his room on
the ship was crowded with samples of the plants
and animals he had collected. As he studied
these, he asked himself the question: how did
different species come to exist
Who is the main character and what did he do
Charles Darwin.
collecting samples.
Take notes quickly.
重点词汇
Charles Darwin 查尔斯·达尔文 ;
naturalist 博物学家 ; 同“naturalistic”
chance to 有机会 ; 偶然发生 ; 正巧
some time 早晚 ; 一段时间
South America 南美洲
different species 不同的物种 ; 异类
come to 苏醒，恢复知觉 ; 总计为，
3 At that time, people believed that all species
had appeared on Earth at the same time, and
had not changed since. But Darwin began to
think differently. He noticed that some species
of animals were very similar to each other.
Maybe animals evolved as they adapted to their
changing environments It was just an idea, but
enough to inspire Darwin to look for
more evidence.
What did Darwin do to prove the newi dea
To look for more evidence
.
Take notes quickly.
重点词汇
At that time 在那时
at the same time 同时 ; 然而，不过
Darwin 达尔文
similar to 类似
each other 彼此，互相
evolved 逐渐形成，
inspire 激励 ; 鼓舞 ;
look for 寻找 ; 探索 ;
4 When the Beagle reached the Galápagos
Islands in 1835, Darwin saw a variety of new
species, but it was the birds that interested
him the most. Darwin noticed that there was
a difference between the finches on each of
the islands. It seemed their beaks had evolved
according to what food was available on that
particular island.
Take notes quickly.
重点词汇
Beagle 小猎犬 ;
Gal 女孩 ; 姑娘 ; 女子
Darwin 达尔文
a variety of 各种各样的 ; 种种 ; 形形色色
noticed 看到 ;
beaks 鸟喙
evolved 逐渐形成
according to 根据 ;
5 Darwin suspected that the finches had evolved
from a common ancestor, which had arrived on
the islands a long time before. Over time, it had
slowly evolved into many new species. And that
was the answer to how new species of plants
and animals came to exist: they evolved from
earlier ancestors
What is the meaning of the underlined word
怀疑.
Take notes quickly.
重点词汇
Darwin 达尔文
suspected 疑有，
evolved 逐渐形成
common ancestor 共同祖先
Over time 随着时间的推移
new species 新种 ; 新物种 ;
answer to 回答；
ancestors 祖宗 ; 祖先
6 It was a completely new idea – a theory of
evolution. Darwin explained this theory in his
book, On the Origin of Species. It was not
published until 1859 and immediately caused
a storm. Many people refused to believe that
living things, including humans, had evolved
from lower forms of life. They were shocked.
But Darwin’s scientific studies were so
convincing that more and more people started
to believe his theory.
What theory was showed in this part
a theory of evolution.
Take notes quickly.
重点词汇
completely new 全新的
theory of 的理论 ; 理论探讨
Darwin 达尔文
Origin of Species 物种起源 ; 物种的起源
living things 生物
scientific studies 科学研究
convincing 令人信服的 ; 有说服力的 ;
7 Today, On the Origin of Species is regarded as
one of the most important works ever written.
It has changed ideas about life on Earth forever.
And it all began with the journey on the Beagle.
What are the influences of this theory
It has changed ideas about life on Earth forever.
Take notes quickly.
重点词汇
Origin of Species 物种起源 ; 物种的起源
regarded 将…认为 ; 把…视为 ; 看待 ; 注视，凝视 ;
one of …之一
written 书面的 ; 笔头的 ;
on Earth 在地球上 ; 地球上
forever 永远 ; 长久地 ;
journey 旅行 ; 行程
Try to finish it!
Before
the journey
During
the journey
After
the journey
A Journey of Discovery
Para.1
Para.2
Para.3
Para.4
Para.5
Para.6
Para.7
Introduction of this passage
On his journey
Think of ideas
More evidences
New ideas
A new theory
Conclusion of this passage
Try to finish it!
Choose the main idea of the passage and give your reasons.
1 Darwin’s interest in various living things made him a great naturalist.
2 Darwin’s journey on the Beagle inspired his Theory of Evolution.
3 Darwin went on a journey to confirm his theory that humans had evolved over time.
What have you learnt about the spirit of scientific exploration
virtues
Determined
strong will
fitness
self-confidence
freed time
imagination
creativity
inspiration
optimistic
not give up
Try to think about others
Question
Talk with others.
Write your ideas.
1.
2.
3.
Thank you!