外研版（2019） 选择性必修第一册 Unit 5 Revealing Nature Understanding ideas课件(共22张PPT)

(共22张PPT)
Unit 5 Revealing nature
to make known something that was
previously secret or unkown
1 What species do you recognise in the picture
2 What factors can cause the process of evolution
The ever-changing environment of nature; environmental changes;
population immigration;
genetic mutation;
cultural preferences...
lower forms of life
higher forms of life
evolve---evolution
lead-in
Who made this discovery
What is the discovery
How did he make the discovery
Charles Robert Darwin
The theory of evolution
The Origin of Species
Pre-reading
Introduction
On his journey
Generate ideas
Look for more evidence
Develop ideas
Propose a theory
Conclusion
How he made the discovery.
Para.1
Para.7
Para.2
Para.3
Para.4
Para.5
Para.6
Fast-reading
Activity 4
1
4
2
3
5
produce
put forward
Choose the main idea of the passage and give your reasons.
Darwin’s interest in various living things made him a great naturalist.
2. 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.
A Journey of Discovery
Fast-reading
1. What is the function of para. 1
To praise Charles Darwin
To arouse readers’ interests
To introduce Charles Darwin’s achievements
To inform readers of Charles Darwin’s life
Careful-reading
Read Para.1 and choose the correct answer.
2. Which of the following statements about Charles Darwin is True
Darwin wanted to benefit from visiting little-known countries
Darwin quitted medical school due to his lack of money
Darwin’s father was satisfied with Darwin
Darwin’s made a significant scientific discovery thanks to his adventures on the ship Beagle
Introduction
Read Para.2 and choose the correct answer.
Careful-reading
various living things in their natural environments and samples of the plants and animals he had collected
very similar to each other
Read Para.3 and choose the correct answer.
Careful-reading
come to exist
Maybe animals evolved as they adapted to their changing environments？
premise (前提) All species were created by ________ Some species of animals were very __________ to each other.
The environment was ___________.
conclusion All species had appeared on Earth ____________, and had not _______ since. Maybe animals _________ as they ______________ their changing environments.
God
at the same time
changed
similar
changing
evolved
adapted to
Read Para.4 and choose the correct answer.
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.
In which aspect were these birds different
What caused their differences
Beaks
Food available on that particular island
Read Para.5 and choose the correct answer.
Careful-reading
had evolved from a common ancestor, which had arrived on the islands a long time before
slowly evolved into many new species.
A _________ ancestor
__________ into different species
common
evolve
Read Para.6 and choose the correct answer.
Careful-reading
had evolved from lower forms of life.
_______ to believe
people were _______
______ to believe
refused
shocked
started
Develop Ideas
Propose a theory
Look for
more evidence
Generate Ideas
On his journey
studied ________________ and noticed some species were very ___________ to each other
Animals _________ as they adapted to their _________ environments
_______ of finches ______
Species________
The Theory of _______
various living things
similar
evolved
changing
Beaks
evolved
evolved
evolution
A Journey of Discovery
Read Para.7 and choose the correct answer.
Careful-reading
Journey on the ___________
Journey to discover _______________
The Theory of Evolution
ship Beagle
A Journey of Discovery
Conclusion
Darwin was a determined man. He had strong curiosity and interests in science and was good at thinking and making discoveries.
Why were many people “shocked” by Darwin’s theory？
At that time, many people believed that all species had appeared on Earth at the same time and had not changed since, but Darwin’s theory proposed that living things, including humans, had evolved from lower forms of life, which, as a result, shocked many people.
2. What kind of person was Darwin according to the passage
Post-reading
The structure
1
2--5
The text is organized in order of____ .
Para___
Para___
Para 6-7
time
Before
the journey
During
the journey
Conclusion
asked himself a question(generated an idea)
answered the question(developed an idea)
published the book (proposed a theory)
started his journey
Conclusion