外研版（2019）选择性必修 第一册Unit 5 Revealing nature Starting out & Understanding ideas课件(共54张PPT)
文档属性
| 名称 | 外研版（2019）选择性必修 第一册Unit 5 Revealing nature Starting out & Understanding ideas课件(共54张PPT) |  | |
| 格式 | pptx | ||
| 文件大小 | 14.7MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-10-26 16:14:50 | ||
图片预览
文档简介
(共54张PPT)
Unit 5 Revealing Nature
Starting out
Look at the page from a science magazine and answer the questions.
They are all species that exit thousands of years on earth; They are old and rare (unusual).
1. What do you know about these animals What makes them special
2. What other similar animals do you know about Share your knowledge with the class.
Komodo dragon（科莫多巨蜥）
Komodo dragons were first encountered by Western researchers in 1910. The researchers said the ancestor of the Komodo dragon most likely evolved in Australia and spread westward, reaching the Indonesian island of Flores 900,000 years ago.
The Komodo dragon is the largest lizard in the world. It can grow to three metres in length and can weigh about 135 kilograms. Despite its size and weight, it can run for short distances at up to 20 kilometres per hour.
Duck-billed platypus（鸭嘴兽）
The first scientists to examine a preserved platypus body judged it a fake in the late 18th century. The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago.
The duck-billed platypus is a small egg-laying mammal (up to 60 cm in length) found only in Eastern Australia including Tasmania. As its name suggests, it has a mouth that looks like a duck`s bill, while its thick fur and flat tail are similar to those of a beaver（海狸）.
Nautilus（鹦鹉螺）
Fossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. That is why it is often given the name “living fossil.”
Now let’s watch a video.
After watching the video, answer the questions.
How can seeds travel
Seeds usually are carried by the wind, water, animals and people.
How can this benefit plants
Plants can have a better chance at life when they are further away from their parent plant.
Unit 5 Revealing Nature
Understanding ideas
Look at the evolutionary tree on your book and answer the questions:
1. What species do you recognise in the picture
2. What factors can cause the process of evolution
Evolutionary tree
angiosperm
gymnosperm
tortoise
algae
crab
snail
fern
moss
round worm
earthworm
coelenterate
paramecium
algae
monad
Decide whether the following statements are True(T) or False(F)
As a child, Darwin wanted to be a doctor.
Darwin traveled to collect and study animal specimens(标本)
Darwin found out the animals were permanent and perfect all the time.
Animals will pass on the features(特点) to help them survive.
On the Origin of Species is oe of the most influential scientific work.
Darwin’s theory was welcomed by people of his time
F
study nature
T
F
evolved with time
T
T
F
questioned
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.
Put the puzzle pieces in order
Develop Ideas
Look for
more evidence
Propose a theory
Generate Ideas
On his journey
A Journey of Discovery
On his journey
Develop Ideas
Look for
more evidence
Propose a theory
Generate Ideas
Charles Darwin
Who
What
How
The Theory of Evolution
On his journey
Generate Ideas
Darwin studied __________________________________________
________________________________________________________
He noticed that some species of animals were __________________
Darwin asked the questions:
How did different species ____________________
_______________________________________
various living things in their natural environments
samples of the plants and animals he had collected.
very similar to each other
come to exist
Maybe animals evolved as they adapted to their changing environments
When the Beagle reached the Galapagos 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.
Look for more evidence
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
It seemed their beaks had evolved according to what food was available on that particular island.
Maybe animals evolved as they adapted to their changing environment
How did the evidence Darwin found out prove his ideas
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.
Develop Ideas
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
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.
Propose a theory
The Theory of Evolution: living things, including humans,
___________________________________________________
evolved from lower forms of life.
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
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 _______________
ship Beagle
The Theory of Evolution
Unit 5 Revealing Nature
Starting out
Look at the page from a science magazine and answer the questions.
They are all species that exit thousands of years on earth; They are old and rare (unusual).
1. What do you know about these animals What makes them special
2. What other similar animals do you know about Share your knowledge with the class.
Komodo dragon（科莫多巨蜥）
Komodo dragons were first encountered by Western researchers in 1910. The researchers said the ancestor of the Komodo dragon most likely evolved in Australia and spread westward, reaching the Indonesian island of Flores 900,000 years ago.
The Komodo dragon is the largest lizard in the world. It can grow to three metres in length and can weigh about 135 kilograms. Despite its size and weight, it can run for short distances at up to 20 kilometres per hour.
Duck-billed platypus（鸭嘴兽）
The first scientists to examine a preserved platypus body judged it a fake in the late 18th century. The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago.
The duck-billed platypus is a small egg-laying mammal (up to 60 cm in length) found only in Eastern Australia including Tasmania. As its name suggests, it has a mouth that looks like a duck`s bill, while its thick fur and flat tail are similar to those of a beaver（海狸）.
Nautilus（鹦鹉螺）
Fossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. That is why it is often given the name “living fossil.”
Now let’s watch a video.
After watching the video, answer the questions.
How can seeds travel
Seeds usually are carried by the wind, water, animals and people.
How can this benefit plants
Plants can have a better chance at life when they are further away from their parent plant.
Unit 5 Revealing Nature
Understanding ideas
Look at the evolutionary tree on your book and answer the questions:
1. What species do you recognise in the picture
2. What factors can cause the process of evolution
Evolutionary tree
angiosperm
gymnosperm
tortoise
algae
crab
snail
fern
moss
round worm
earthworm
coelenterate
paramecium
algae
monad
Decide whether the following statements are True(T) or False(F)
As a child, Darwin wanted to be a doctor.
Darwin traveled to collect and study animal specimens(标本)
Darwin found out the animals were permanent and perfect all the time.
Animals will pass on the features(特点) to help them survive.
On the Origin of Species is oe of the most influential scientific work.
Darwin’s theory was welcomed by people of his time
F
study nature
T
F
evolved with time
T
T
F
questioned
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.
Put the puzzle pieces in order
Develop Ideas
Look for
more evidence
Propose a theory
Generate Ideas
On his journey
A Journey of Discovery
On his journey
Develop Ideas
Look for
more evidence
Propose a theory
Generate Ideas
Charles Darwin
Who
What
How
The Theory of Evolution
On his journey
Generate Ideas
Darwin studied __________________________________________
________________________________________________________
He noticed that some species of animals were __________________
Darwin asked the questions:
How did different species ____________________
_______________________________________
various living things in their natural environments
samples of the plants and animals he had collected.
very similar to each other
come to exist
Maybe animals evolved as they adapted to their changing environments
When the Beagle reached the Galapagos 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.
Look for more evidence
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
It seemed their beaks had evolved according to what food was available on that particular island.
Maybe animals evolved as they adapted to their changing environment
How did the evidence Darwin found out prove his ideas
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.
Develop Ideas
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
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.
Propose a theory
The Theory of Evolution: living things, including humans,
___________________________________________________
evolved from lower forms of life.
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
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 _______________
ship Beagle
The Theory of Evolution