Unit 5 Revealing nature Understanding ideas 课件(共32张PPT)-外研版（2019）选择性必修第一册

(共32张PPT)
Unit 5
Revealing nature
Understanding ideas
Contents
Post-reading
Careful reading
Fast reading
Pre-reading
I
II
III
IV
I
Pre-reading
zebra 斑马 tortoise 乌龟 crab螃蟹 snail蜗牛
earthworm 蚯蚓 paramecium 草履虫
[ θw m]
earthworm
[ p r mis m]
paramecium
New words Ⅰ
go back
frog 青蛙 moss 苔藓fern蕨类植物 algae水藻，海藻
New words Ⅱ
go back
pre - reading
Look at the evolutionary tree and answer the questions.
Q1. What species do you recognise in the picture
Evolutionary tree
Q2. What factors can cause the process of evolution
weather, environment,genetic mutation(基因突变) ....
物种
认出
因素
进化
human
zebra
tortoise
fish
crab
snail
fern
moss
earthworm
paramecium
algae
1. What species do you recognise in the picture (P66)
Evolutionary tree
bird
frog
pre - reading
New words Ⅰ
New words Ⅱ
pre - reading
lower forms of life
higher forms of life
evolution
The direction of evolution:
Tom
...
pre - reading
Tom:Hey, juli. I am curious about evolution . Can you recommend something to me Who do you recommend
Tom : That will be great!
Tom
pre - reading
pre - reading
Charles Darwin
geologist(地质学家）, naturalist
British (英国人）
The founder of Theory of Evolution 进化论
Published the Origin of Species 《物种起源》
[t ɑ:lz] [ dɑ w n]
Turn to P66 and step on Darwin’s journey of discovery!
What’s the story behind Darwin’s discovery of Theory of Evolution
II
Fast reading
A Journey of Discovery
What is the journey like
What’s
the discovery
Fast - reading
Para_____
The structure
2-5
The text is organized in order of______ .
Para___
Para _____
time
During
the journey
After
the journey
1
6-7
Fast - reading
Before
the journey
III
Careful reading
He was not the captain's
_______________
He was a ________ to himself and all his family
He was a young man who had left ______________ without_______________.
first choice
completing his degree
medical school
disgrace
Labels on the young man
In common people's eyes
In captain's eyes
In father's eyes
careful - reading
Para.1
careful - reading
1.on his journey
踏上旅途
2.generate ideas
产生观点
3.look for more evidence 寻求更多证据
4.develop ideas
发展观点
5.propose a theory
提出理论
Para.2前半部分
Para.2后半部分
Para.3
Para.5
Para.6
careful - reading
various living things in their natural environments
very similar to each other
Para.2
Para.3
careful - reading
come to exist
Maybe animals evolved as they adapted to their changing environments
Para.2
Para.3
careful - reading
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.
Para.4
1. In which aspect were these birds different？
2. What caused their differences
Beaks
Food available on that particular island
A _________ ancestor
common
__________ into different species
evolve
共同的
careful - reading
had evolved from a
common ancestor
slowly evolved into many new species
Para.5
careful - reading
had evolved from lower forms of life.
Para.6
_______ to believe
people were _______
______ to believe
refused
shocked
started
People’s reaction towards the theory
Para.6
What do you think about the theory of Evolution
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
A Journey of Discovery
Journey on the ___________
Journey to discover _______________
the Beagle
The Theory of Evolution
careful - reading
Choose the main idea of the passage and give your reasons.
Darwin’s interest in various living things made him a great naturalist.
Darwin’s journey on the Beagle inspired his Theory of Evolution.
Darwin went on a journey to confirm his
theory that humans had evolved over time.
激励
渐渐地，慢慢地
P68
1831
the Beagle
started his journey
South America,
asked himself questions
(generated ideas)
1835(developed an idea)
answered the question
1859
published the book
(proposed a theory)
Darwin spent _____ years on his discovery
But spent _____years publishing his Theory of Evolution in 1859
4
24
A ________ Journey of __________Discovery by_______Darwin
tough
important
brave
perseverant
Summary
dangerous
revolutionary
Think and share
What kind of person was Darwin according to the passage
What have you learnt about the spirit of scientific exploration
Darwin was a determined man. He had strong curiosity and interests in science and was good at thinking and making discoveries.
truth-seeking. perseverance. dare to question/challenge the authority....
I can succeed in science. The most important thing is the love of science and insisting on long-term exploration.
—Charles Robert Darwin
Darwin’s scientific spirit