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(共19張PPT)
Unit 5 Understanding ideas
A Journey of Discovery
Look at the evolutionary tree. What species do you recognise in the picture
I can see human, zebra, paramecium, snail, earthworm, crab, fish, tortoise, bird, frog, fern, algae, moss，angiosperm and so on.
zebra
frog
snail
tortoise
human
evolutionary tree進化樹
jellyfish
水母
crab
fish
fern
蕨類植物
paramecium
草履蟲
earthworm
蚯蚓
algae
水藻
bird
starfish
moss
angiosperm被子植物
platyhelminth
扁形動物（蠕蟲等）
annelid
環(huán)節(jié)動物
gymnosperm
裸子植物
Lead-in
Look and speak
Activity 1
genetic mutation and variation
What factors can cause the process of evolution
evolutionary
tree
factors
natural selection
population immigration
environmental changes
cultural preferences
Lead-in
Look and speak
Activity 1
While mentioning evolution,what will you think of
Pre-reading
Think and speak
Activity 2
Charles Darwin is a well-known naturalist and biologist. Born in 1809 in England.His most famous work is "On the Origin of Species," published in 1859. In this book, he proposed the theory of evolution by natural selection, which suggests that species change over time through a process of natural selection. This theory caused controversy at the time, but it has since become widely accepted in the scientific community.
Darwin also made important contributions to the study of geology, botany, and zoology. He was a prolific writer and published many books and articles throughout his career.
Charles Darwin
Pre-reading
Think and speak
Activity 2
Read the text about Darwin and tell us your understanding of the title.
journey:
an act of travelling from one place to another, especially when they are far apart （尤指長途）旅行，行程
The title may indicate that the work leading to the discovery takes quite a long time and great efforts, determination and perseverance.
A Journey of Discovery
Read and tell
While reading
Activity 3
Choose the main idea of the text.
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.
Read for the main idea
While reading
Activity 4
What was thhe old ideas about evolution
At that time, many people believed that all species had appeared on Earth at the same time and had not changed since.But Darwin began to think differently....
Read for details
While reading
Activity 3
Number the puzzle piece in order. Organize information from the text and complete them
Read and complete
While reading
Activity 4
He noticed that some species of animals were _________________
ON HIS JOURNEY
Darwin studies_______________________
various living things in their natural environments and samples of the plants and animals he had collected.
very similar to each other
GENERATE LEADS
Darwin asked the questions:
How diid different species_________
______________________________
come to exist
Maybe animals evolved as they adapted to their changing environments
1
2
LOOK FOR MORE EVIDENCE
On the Galapagos Islands:
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.
3
DEVELOP IDEAS
Darwin suspected that the finches _________________________________ ___________________________ and it had ________________
PROPOSE A THEORY
The theory of Evolution” living things, including humans, _______________.
had evolved from a common ancestor, which had arrived on the islands a long time before
slowly evolved into many new species.
had evolved from lower forms of life
4
5
1
4
5
2
3
Read and complete
While reading
Activity 4
ON HIS JOURNEY
GENERATE LEADS
LOOK FOR MORE EVIDENCE
DEVELOP IDEAS
PROPOSE A THEORY
Why did Darwin not publish his Theory of Evolution until 1859, about twenty years after his discovery
It may need to collect more information and materials to support the theory.
He may be worried about being restricted by the traditional social ideas of that time.
At that, Darwin was very young, and he may worry about the publisn of the theory would harm his future.
Read and answer
While reading
Activity 5
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.
...
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.
Read and answer
While reading
Activity 5
What kind of person was Darwin according to the passage
He was determined and curious about science and was enthusiastic to make new discovers.
determined
curious
enthusiastic
Read and answer
While reading
Activity 5
How do you think the human species will evolve in the future
Humans may become taller and taller.
Humans may liver longer.
Humans may become wiser and wiser.
...
Think and share
Post-reading
Activity 6
What have you learnt about the spirit of scientific exploration
How can this spirit help you in your life and studies
curiosity
perseverance
bravery
determination
strictness
questioning
spirits of scientific exploration
Discussion
Post-reading
Activity 7
Prepare for a talk about “The Theory of evolution”.
Assignment
Thanks!

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