Unit 5 Into the unknown_高二英语外研版（2019）选择性必修第四册教材习题精讲课件（共30张）
文档属性
| 名称 | Unit 5 Into the unknown_高二英语外研版（2019）选择性必修第四册教材习题精讲课件（共30张） |  | |
| 格式 | pptx | ||
| 文件大小 | 6.7MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2025-04-21 19:53:30 | ||
图片预览
文档简介
(共30张PPT)
教材习题
Unit 5
Into the unknown
01
Understanding ideas
Starting out Activity 1
Watch the video and answer the questions.
Activity
1 What natural phenomena are mentioned in the video
【Answer: The natural phenomena that are mentioned in the video include: the earthquake, the solar eclipse, thunder and lightning, and the mirage. 】
2 How were these explained in the past What are the scientific explanations behind them
【Suggest Answer: For the earthquake: Native Americans used to believe that earthquakes were caused by a struggle between a large bird, called the Thunderbird, and a whale. An ancient Japanese belief was that earthquakes were caused by the movements of a giant catfish that carried the world on its back. Scientists now know that earthquakes are actually caused by the movement of tectonic plates. ...】
Starting out Activity 1
Watch the video and answer the questions.
Activity
2 How were these explained in the past What are the scientific explanations behind them
【Suggest Answer: For the solar eclipse: In many cultures, there were ancient beliefs that solar eclipses were caused by a creature eating the Sun. In Vietnam, that creature was a giant frog, in Norway, a wolf, and in China, it was a huge dog. In fact, solar eclipses happen when the Moon passes between Earth and the Sun, temporarily blocking the Sun’s light.】
Starting out Activity 1
Watch the video and answer the questions.
Activity
2 How were these explained in the past What are the scientific explanations behind them
【Suggest Answer: For thunder and lightning: In Medieval Europe, people thought that supernatural forces caused thunder and lightning. It was a sign of bad times ahead. Modern science tells us that lightning is an electric charge moving between clouds, or between clouds and the earth. Thunder is a shock wave of sound caused by lightning.
For the mirage: In Ancient China, peolple believed that this was actually caused by the breath of a dragon. These days, people know that a “mirage” happens when layers of air with varying temperatures cause light to bend.】
Activity 2. Read the passage and find out the possible reasons for the disappearance of Maya civilisation.
Activity
【Answer: The way that the Maya people changed the landscape around them may have been one of the reasons behind the disappearance of their civilisation. Turning wetlands into fields for growing grains, digging huge canal systems and cutting down more trees for construction reduced their ability to cope with natural disasters. When those natural disasters, such as droughts, struck, the Maya would have faced food shortages, conflicts and, eventually, the downfall of their cities.】
Activity 3. Choose the topic sentences and write them on the lines to complete the passage.
Activity
a Maya civilisation has been surrounded by mystery since its rediscovery in the 19th century.
b But the greatest mystery of all is what caused the Maya to abandon most of their great cities.
c Although his theory has been dismissed by scholars, it shows how powerful the secrets of Ancient Maya civilisation are among people.
d Research also suggests that those natural disasters may have led to the decline of the Maya.
e Meanwhile, the rise and fall of this civilisation must also leave us thinking about our own past, present and future.
f Some research seems to indicate that the Maya people themselves may have played a part in their downfall.
1-c 2-a 3-b 4-f 5-d 6-e
Activity 4. Organise information from the passage and complete the file of Maya civilisation.
Activity
Mexico
Central America
natural disasters
turning wetlands into fields
digging huge canal systems
population
droughts
lasting for a couple of years
Activity 5. Complete the cultural comparison with information from the passage.
Activity
Comparing the highly-sophisticated civilisations of the Maya and Ancient China reveals some surprising similarities. They both possessed a detailed understanding of 1___________ and astronomy, which helped them maintain an accurate 2__________ and a complex 3____________ that used signs to represent sounds and meanings.
mathematics
calendar
writing system
Activity 5. Complete the cultural comparison with information from the passage.
Activity
It can therefore be difficult to explain why, despite their excellent construction skills, the Maya never learnt to use 4___________________________________, while the ancient Chinese did. Facts such as these add to the mystery surrounding Maya civilisation, driving people to find out why it 5___________ while others, such as Ancient China, survived and thrived.
wheels, metal tools or even animal power
disappeared
Think & share
1. What is the author’s purpose in starting the passage with the story about William Gadoury
The story about William Gadoury shows how the secrets of Ancient Maya civilisation have captured people’s imaginations.
2. What other things do you think could destroy a civilisation Share an example with the class.
3.What lessons can you learn from the collapse of Maya civilisation How can this information help the development of today’s society
4.Which of the arguments in the passage did you find the most convincing Give your reasons.
02
Using language
Activity
1 Which sentence contains a clause that serves as the
subject of the sentence
2 Which sentence contains a clause that serves as the object
of the sentence
3 Which sentence contains a clause that gives further
information about the subject in the sentence
Sentence c.
Sentence a.
Sentence b.
Activity 1. Look at the sentences from the reading passage and answer the questions.
Activity
In sentence a, “how” refers to the extent of power of Ancient Maya civilisation’s secrets; In sentence b, “what” refers to the thing that caused the Maya to abandon most of their great cities; In sentence c, “why” refers to the reason that Maya civilisation collapsed.
4 What do “how”, “what” and “why” in each sentence refer to
Activity 1. Look at the sentences from the reading passage and answer the questions.
Activity 2. Complete the passage using noun clauses with words in brackets.
Activity
There are many mysteries about dinosaurs to which we long to find explanations. You may think that dinosaurs were big, green and scaly, right In fact, it seems that they appeared very different form 1 ______________ (think).
In recent years, scientists have worked out 2 ________________________________(look): many of them were small with feathers. However, 3 _______________ (have) feathers still isn’t clear — it might have been for communicating or for staying warm, but not just for flight.
Scientists also believe that many dinosaurs had bright colours. It seems 4 _______________ (depend on) their habitats. That is, dinosaurs which could fly would have had different colours to those living in the sea.
what we think
what they looked like/ how they looked
whether they had
that depended on
Activity 5. Read the passage and answer the questions. Pay attention to the words and expressions in bold.
Activity
1 What is the flight instinct Why do some people react that way in the face of the unknown
2 What other reactions could people have when facing the unknown
Flight instinct is our instinctive reaction to get away from a strange, unfamiliar or dangerous situation.
Some people react that way in the face of the unknown because it is a sensible and understandable natural response.
Some people choose to overcome their fears and face the unknown.
Activity 6. Put the words and expressions in Activity 5 into the table. Add any more you can think of.
Activity
Avoiding Exploring Overcoming Hesitating
making a quick getaway
running for their lives from
steer clear of
retreating to
shrink from
check out
test the waters of
set out into
delve into
taking action
subdue
endured
think twice
look into
consider our options
Activity 7. Read the passage and answer the questions.
Activity
1 What functions of the brain are mentioned in the passage
2 What is the current research situation concerning the brain
The brain functions mentioned include its being the centre of the nervous system and controlling most of the body’s activities, including vision, memory, speech and rhythm.
There is still a long way to go before we can completely understand the workings of the brain.
Activity 8. Listen to the interview and choose the topic discussed.
Activity
Methods to keep the brain healthy and active.
Sleep-related mysteries.
Ways of improving sleep quality.
Methods of interpreting dreams.
√
Activity 9. Listen again and complete the table.
Activity
rest and do maintenance
remain active
makes lots of poisonous chemicals
remove these chemicals
enough data
the most important reason
New connections are formed between different parts
uses them to form new memories
sleep is necessary to this function
Why do some people dream in colour and others don’t
Activity plete the boxes with the expressions from the interview.
Activity
Asking for more information Explaining
Could you tell us something about...
What other reasons could there be for it
Would you tell us more about...
it’s because...
... prove that...
03
Developing ideas
Activity 1. Work in groups. Look at the picture and answer the questions. Do further research if necessary.
Activity
1 What different zones are there in the ocean
The different zones in the ocean are Sunlight Zone, Twilight Zone, Midnight Zone and Abyssal Zone.
Activity 2. Read the passage and find out what has been discovered in the ocean depths.
Activity
Shipwrecks such as that of the Esmeralda, ruins of ancient cities like Nea polis, extraordinary deep-sea creatures such as bone-white coral and the barreleye, and the substance known as “fire ice” have been discovered in the ocean depths.
Activity 3. Think about the structure of the passage and complete the diagram.
Activity
deep sea
Archaeological
shallow waters
vast depths
the ruins of Neapolis
Biological
the planet’s fish
bone-white coral
the capacity for life on our planet
the barreleye
life to be found even around the deep-sea volcanic openings
“fire ice”
deep-sea drilling
the sea bed
China’s underwater vessels
Think & share
1 Why do you think the author uses statistics in the passage
The use of statistics and examples make the passage more convincing.
4 What common message do the two reading passages in this unit convey How do they each build upon this idea
Both passages convey the message that humans have the desire and means to explore the unknown.
The first passage does this by looking at our fascination with history’s greatest mysteries, while the second passage looks at pioneering exploration of Earth’s oceans.
Activity 5. Read the magazine article and answer the questions.
Activity
1 Why is the 30th parallel north mysterious
2 What are some unusual explanations for it
3 What are some possible scientific explanations
The 30th parallel north is mysterious because it is where numerous sites of ancient civilisations and impressive natural features lie.
Some believe that the 30th parallel north is a line of great natural energy, with frequent earthquakes and volcanic eruptions, and others even claim that its amazing natural features were caused by supernatural powers.
Possible scientific explanations for the 30th parallel north include the generally warm and damp climate that made it a good place for civilisations to develop, and the fact that it is where major tectonic plates meet.
【Sample】
Far below the surface of the North Atlantic Ocean, in a roughly triangular area known as the Bermuda Triangle, lie more than 50 shipwrecks and 20 plane wrecks. What makes these wrecks so mysterious is that the cause of their fate remains largely unknown - ships were abandoned without apparent reason, distress signals were never sent and aircraft were lost without trace.
Activity
【Sample】
Some believe that supernatural forces are responsible, while others put the accidents and disappearances down to coincidence. Scientific theories, meanwhile, include pilot error when trying to navigate the area, and huge “rogue waves” caused by terrible storms. Although many ships and planes cross the Bermuda Triangle without incident, the stories behind those doomed vessels’ fates continue to capture people’s imaginations.
Activity
THANKS
教材习题
Unit 5
Into the unknown
01
Understanding ideas
Starting out Activity 1
Watch the video and answer the questions.
Activity
1 What natural phenomena are mentioned in the video
【Answer: The natural phenomena that are mentioned in the video include: the earthquake, the solar eclipse, thunder and lightning, and the mirage. 】
2 How were these explained in the past What are the scientific explanations behind them
【Suggest Answer: For the earthquake: Native Americans used to believe that earthquakes were caused by a struggle between a large bird, called the Thunderbird, and a whale. An ancient Japanese belief was that earthquakes were caused by the movements of a giant catfish that carried the world on its back. Scientists now know that earthquakes are actually caused by the movement of tectonic plates. ...】
Starting out Activity 1
Watch the video and answer the questions.
Activity
2 How were these explained in the past What are the scientific explanations behind them
【Suggest Answer: For the solar eclipse: In many cultures, there were ancient beliefs that solar eclipses were caused by a creature eating the Sun. In Vietnam, that creature was a giant frog, in Norway, a wolf, and in China, it was a huge dog. In fact, solar eclipses happen when the Moon passes between Earth and the Sun, temporarily blocking the Sun’s light.】
Starting out Activity 1
Watch the video and answer the questions.
Activity
2 How were these explained in the past What are the scientific explanations behind them
【Suggest Answer: For thunder and lightning: In Medieval Europe, people thought that supernatural forces caused thunder and lightning. It was a sign of bad times ahead. Modern science tells us that lightning is an electric charge moving between clouds, or between clouds and the earth. Thunder is a shock wave of sound caused by lightning.
For the mirage: In Ancient China, peolple believed that this was actually caused by the breath of a dragon. These days, people know that a “mirage” happens when layers of air with varying temperatures cause light to bend.】
Activity 2. Read the passage and find out the possible reasons for the disappearance of Maya civilisation.
Activity
【Answer: The way that the Maya people changed the landscape around them may have been one of the reasons behind the disappearance of their civilisation. Turning wetlands into fields for growing grains, digging huge canal systems and cutting down more trees for construction reduced their ability to cope with natural disasters. When those natural disasters, such as droughts, struck, the Maya would have faced food shortages, conflicts and, eventually, the downfall of their cities.】
Activity 3. Choose the topic sentences and write them on the lines to complete the passage.
Activity
a Maya civilisation has been surrounded by mystery since its rediscovery in the 19th century.
b But the greatest mystery of all is what caused the Maya to abandon most of their great cities.
c Although his theory has been dismissed by scholars, it shows how powerful the secrets of Ancient Maya civilisation are among people.
d Research also suggests that those natural disasters may have led to the decline of the Maya.
e Meanwhile, the rise and fall of this civilisation must also leave us thinking about our own past, present and future.
f Some research seems to indicate that the Maya people themselves may have played a part in their downfall.
1-c 2-a 3-b 4-f 5-d 6-e
Activity 4. Organise information from the passage and complete the file of Maya civilisation.
Activity
Mexico
Central America
natural disasters
turning wetlands into fields
digging huge canal systems
population
droughts
lasting for a couple of years
Activity 5. Complete the cultural comparison with information from the passage.
Activity
Comparing the highly-sophisticated civilisations of the Maya and Ancient China reveals some surprising similarities. They both possessed a detailed understanding of 1___________ and astronomy, which helped them maintain an accurate 2__________ and a complex 3____________ that used signs to represent sounds and meanings.
mathematics
calendar
writing system
Activity 5. Complete the cultural comparison with information from the passage.
Activity
It can therefore be difficult to explain why, despite their excellent construction skills, the Maya never learnt to use 4___________________________________, while the ancient Chinese did. Facts such as these add to the mystery surrounding Maya civilisation, driving people to find out why it 5___________ while others, such as Ancient China, survived and thrived.
wheels, metal tools or even animal power
disappeared
Think & share
1. What is the author’s purpose in starting the passage with the story about William Gadoury
The story about William Gadoury shows how the secrets of Ancient Maya civilisation have captured people’s imaginations.
2. What other things do you think could destroy a civilisation Share an example with the class.
3.What lessons can you learn from the collapse of Maya civilisation How can this information help the development of today’s society
4.Which of the arguments in the passage did you find the most convincing Give your reasons.
02
Using language
Activity
1 Which sentence contains a clause that serves as the
subject of the sentence
2 Which sentence contains a clause that serves as the object
of the sentence
3 Which sentence contains a clause that gives further
information about the subject in the sentence
Sentence c.
Sentence a.
Sentence b.
Activity 1. Look at the sentences from the reading passage and answer the questions.
Activity
In sentence a, “how” refers to the extent of power of Ancient Maya civilisation’s secrets; In sentence b, “what” refers to the thing that caused the Maya to abandon most of their great cities; In sentence c, “why” refers to the reason that Maya civilisation collapsed.
4 What do “how”, “what” and “why” in each sentence refer to
Activity 1. Look at the sentences from the reading passage and answer the questions.
Activity 2. Complete the passage using noun clauses with words in brackets.
Activity
There are many mysteries about dinosaurs to which we long to find explanations. You may think that dinosaurs were big, green and scaly, right In fact, it seems that they appeared very different form 1 ______________ (think).
In recent years, scientists have worked out 2 ________________________________(look): many of them were small with feathers. However, 3 _______________ (have) feathers still isn’t clear — it might have been for communicating or for staying warm, but not just for flight.
Scientists also believe that many dinosaurs had bright colours. It seems 4 _______________ (depend on) their habitats. That is, dinosaurs which could fly would have had different colours to those living in the sea.
what we think
what they looked like/ how they looked
whether they had
that depended on
Activity 5. Read the passage and answer the questions. Pay attention to the words and expressions in bold.
Activity
1 What is the flight instinct Why do some people react that way in the face of the unknown
2 What other reactions could people have when facing the unknown
Flight instinct is our instinctive reaction to get away from a strange, unfamiliar or dangerous situation.
Some people react that way in the face of the unknown because it is a sensible and understandable natural response.
Some people choose to overcome their fears and face the unknown.
Activity 6. Put the words and expressions in Activity 5 into the table. Add any more you can think of.
Activity
Avoiding Exploring Overcoming Hesitating
making a quick getaway
running for their lives from
steer clear of
retreating to
shrink from
check out
test the waters of
set out into
delve into
taking action
subdue
endured
think twice
look into
consider our options
Activity 7. Read the passage and answer the questions.
Activity
1 What functions of the brain are mentioned in the passage
2 What is the current research situation concerning the brain
The brain functions mentioned include its being the centre of the nervous system and controlling most of the body’s activities, including vision, memory, speech and rhythm.
There is still a long way to go before we can completely understand the workings of the brain.
Activity 8. Listen to the interview and choose the topic discussed.
Activity
Methods to keep the brain healthy and active.
Sleep-related mysteries.
Ways of improving sleep quality.
Methods of interpreting dreams.
√
Activity 9. Listen again and complete the table.
Activity
rest and do maintenance
remain active
makes lots of poisonous chemicals
remove these chemicals
enough data
the most important reason
New connections are formed between different parts
uses them to form new memories
sleep is necessary to this function
Why do some people dream in colour and others don’t
Activity plete the boxes with the expressions from the interview.
Activity
Asking for more information Explaining
Could you tell us something about...
What other reasons could there be for it
Would you tell us more about...
it’s because...
... prove that...
03
Developing ideas
Activity 1. Work in groups. Look at the picture and answer the questions. Do further research if necessary.
Activity
1 What different zones are there in the ocean
The different zones in the ocean are Sunlight Zone, Twilight Zone, Midnight Zone and Abyssal Zone.
Activity 2. Read the passage and find out what has been discovered in the ocean depths.
Activity
Shipwrecks such as that of the Esmeralda, ruins of ancient cities like Nea polis, extraordinary deep-sea creatures such as bone-white coral and the barreleye, and the substance known as “fire ice” have been discovered in the ocean depths.
Activity 3. Think about the structure of the passage and complete the diagram.
Activity
deep sea
Archaeological
shallow waters
vast depths
the ruins of Neapolis
Biological
the planet’s fish
bone-white coral
the capacity for life on our planet
the barreleye
life to be found even around the deep-sea volcanic openings
“fire ice”
deep-sea drilling
the sea bed
China’s underwater vessels
Think & share
1 Why do you think the author uses statistics in the passage
The use of statistics and examples make the passage more convincing.
4 What common message do the two reading passages in this unit convey How do they each build upon this idea
Both passages convey the message that humans have the desire and means to explore the unknown.
The first passage does this by looking at our fascination with history’s greatest mysteries, while the second passage looks at pioneering exploration of Earth’s oceans.
Activity 5. Read the magazine article and answer the questions.
Activity
1 Why is the 30th parallel north mysterious
2 What are some unusual explanations for it
3 What are some possible scientific explanations
The 30th parallel north is mysterious because it is where numerous sites of ancient civilisations and impressive natural features lie.
Some believe that the 30th parallel north is a line of great natural energy, with frequent earthquakes and volcanic eruptions, and others even claim that its amazing natural features were caused by supernatural powers.
Possible scientific explanations for the 30th parallel north include the generally warm and damp climate that made it a good place for civilisations to develop, and the fact that it is where major tectonic plates meet.
【Sample】
Far below the surface of the North Atlantic Ocean, in a roughly triangular area known as the Bermuda Triangle, lie more than 50 shipwrecks and 20 plane wrecks. What makes these wrecks so mysterious is that the cause of their fate remains largely unknown - ships were abandoned without apparent reason, distress signals were never sent and aircraft were lost without trace.
Activity
【Sample】
Some believe that supernatural forces are responsible, while others put the accidents and disappearances down to coincidence. Scientific theories, meanwhile, include pilot error when trying to navigate the area, and huge “rogue waves” caused by terrible storms. Although many ships and planes cross the Bermuda Triangle without incident, the stories behind those doomed vessels’ fates continue to capture people’s imaginations.
Activity
THANKS