Unit 5 Into the unknown Starting out课件（共22张，内嵌音视频）2024-2025学年高二英语外研版（2019）选择性必修4
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| 名称 | Unit 5 Into the unknown Starting out课件（共22张，内嵌音视频）2024-2025学年高二英语外研版（2019）选择性必修4 |  | |
| 格式 | pptx | ||
| 文件大小 | 42.5MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2025-04-22 20:55:28 | ||
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文档简介
(共22张PPT)
Unit 5 Starting out
Into the unknown
探索未知
导读课件
To watch the video and get the main idea of the video;
To learn some English expressions related to the phenomena or events in the pictures by looking at them;
To talk about your understanding of the four unsolved mysteries based on your existing knowledge.
Learning objectives
civilisation n. 文明（社会） 66
* intrigue v. （因奇特或神秘而）激起……的兴趣，引起……的好奇心 66
bury v. 将……埋在下面 66
* pyramid n. 金字塔 66
astronomy n. 天文学 67
canal n. 运河 68
* tropical adj. 来自热带的；产于热带的 68
* cyclone n. 气旋；旋风 68
* megadrought n. 超级干旱 68
* downfall n. 衰败 68
ruin n. 残垣断壁，废墟 68
fall into ruin （因无人照料而）衰落，败落 68
abandon v. 离弃，逃离 68
dismiss v. 拒绝考虑，否定 68
expansion n. 扩大；增加 69
Words and expressions
1
Watch the video and answer the questions.
What natural phenomena are mentioned in the video
How were these explained in the past What are the scientific explanations behind them
Activity 1
Activity 1
1
Watch the video and answer the questions.
视频脚本
Ancient Mysteries
①A flash of lightning, a loud clap of thunder, the earth moving underneath our feet... These natural phenomena might be frightening, but we feel safer knowing the science behind them. In ancient times, however, such natural phenomena were believed to be the work of magnificent beasts and supernatural beings.
②Native 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, which are very large areas of Earth's outer crust.
古老的秘密
①一道闪电，一声雷鸣，大地在我们脚下移动……这些自然现象可能很可怕，但我们知道它们背后的科学原理会更安全。 然而，在古代，这种自然现象被认为是宏伟的野兽和超自然生物的杰作。
②印第安人过去认为地震是由一种叫做雷鸟的大鸟和鲸鱼之间的斗争引起的。 古老的日本人相信地震是由一只巨大的鲶鱼的运动引起的，它把世界驮在背上。 科学家们现在知道，地震实际上是由构造板块的运动引起的，构造板块是地球外壳的一大片区域。
Activity 1
1
Watch the video and answer the questions.
视频脚本
③In 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. The ancient Chinese would bang on drums to scare away this ferocious creature. In fact, solar eclipses happen when the Moon passes between Earth and the Sun, temporarily blocking the Sun's light.
④In 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.
③在许多文化中，古老的信仰认为日食是由一种生物吃掉太阳引起的。 在越南，这种生物是一只巨大的青蛙，在挪威是一只狼，在中国是一只巨大的狗。 古代中国人会敲鼓来吓走这种凶猛的生物。 事实上，当月球经过地球和太阳之间时，日食就会发生，暂时阻挡了太阳的光线。
④在中世纪的欧洲，人们认为是超自然的力量造成了打雷和闪电。 这是未来艰难时期的征兆。 现代科学告诉我们，闪电是一种电荷在云之间移动，或者在云与地球之间移动。 雷声是由闪电引起的冲击波。
Activity 1
1
Watch the video and answer the questions.
视频脚本
⑤And finally, we've all heard tales of water appearing in the desert ahead of thirsty travellers. They race towards it, only to find the water has disappeared. In Ancient China, people believed that this was caused by the breath of a dragon. These days, all schoolchildren learn that a "mirage" happens when layers of air with varying temperatures cause light to bend. Some of these students will grow up to be the scientists of tomorrow, exploring our natural world, and solving more of its mysteries.
⑤最后，我们都听说过这样的故事：在口渴的旅行者之前，沙漠里就出现了水。 他们冲向它，却发现水已经消失了。 在中国古代，人们认为这是由龙的呼吸引起的。 如今，所有的学生都知道，当不同温度的空气层导致光线弯曲时，就会出现“海市蜃楼”。 这些学生中的一些人将成长为未来的科学家，探索我们的自然世界，解决更多的谜团。
Activity 1
1
Watch the video and answer the questions.
1 What natural phenomena are mentioned in the video
2 How were these explained in the past What are the scientific explanations behind them
The natural phenomena that are mentioned in the video include: the earthquake, the solar eclipse, thunder and lightning, and the mirage.
In the past, such natural phenomena were believed to be the work of magnificent beasts and supernatural beings，which all varies from place to place.There is now a general scientific consensus on these phenomena.
Activity 1
1
Watch the video and answer the questions.
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.
2 How were these explained in the past What are the scientific explanations behind them
Activity 1
1
Watch the video and answer the questions.
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.
2 How were these explained in the past What are the scientific explanations behind them
Activity 1
1
Watch the video and answer the questions.
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.
2 How were these explained in the past What are the scientific explanations behind them
Activity 1
1
Watch the video and answer the questions.
For the mirage:
In Ancient China, people 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 1
2 How were these explained in the past What are the scientific explanations behind them
1
Watch the video and answer the questions.
The modern scientific explanations
1
2
3
4
Scientists now know that earthquakes are caused by the movement of tectonic plates.
In fact, solar eclipses happen when the Moon passes between Earth and the sun temporarily blocking the sun’s light.
Modern science tells us that lightning is an electric charge moving between clouds and the earth. Thunder is a shock wave of sound caused by lightning.
These days, people know that a mirage happens when layers of air with varying temperatures caused light to bend.
Activity 1
2 How were these explained in the past What are the scientific explanations behind them
1
Watch the video and answer the questions.
2
Look at the pictures and answer the questions.
Activity 2
1 What do you know about these mysteries
2 What other unsolved mysteries do you know of
3 Which of these do you most want to investigate
Atlantis
Atlantis is a legendary city, which is described in the work of the Greek philosopher Plato. The story of Atlantis with its fabulously wealthy and advanced civilisation which was swept into the sea to be lost for ever has captured the imagination of readers for over two millennia.
Activity 2
legendary / led nderi/adj. 非常有名的,传说中的
fabulously / f bj l sli/ adj.难以置信的
civilisation n. 文明；文明社会
sweep -swept- swept v.横扫
capture v. 俘获，捕获；夺取，占领
millennia /m leni / n.千年
It's been disturbed for the first time in millennia.
这是千年来第一次被打扰。
2
Look at the pictures and answer the questions.
Nazca Lines
The Nazca Lines are a collection of giant geometric patterns and animal shapes. Drawn into the landscapes of southern Peru, the majority of the lines are believed to be the work of the Nazca people around 1AD to 700. Designated a UNESCO World Heritage Site in 1994, numerous studies and theories have so far not explained the reason why the lines were created.
Activity 2
giant/ d a nt/ n. （传说中的）巨人
geometric / d i metr k/ adj. 几何图形的；几何的
majority /m d r ti/ n. 大多数
designate / dez ɡne t/ v. 把……定名为
numerous / nu m r s/ adj. 众多的，许多的
theory/ θi ri/ n. 学说，理论
gravitational/ ɡr v te nl/ adj. [力] 重力的，[力] 引力的
2
Look at the pictures and answer the questions.
Tunguska event通古斯大爆炸
Tunguska event, enormous explosion that is estimated to have occurred at 7:14 am plus or minus one minute on 30 June 1908, at an altitude of 5–10 kilometres, flattening some 2,000 square kilometres and charring more than 100 square kilometres of pine forest near the Podkamennaya Tunguska River in Central Siberia, Russia.
Activity 2
enormous / n rm s/ adj. 巨大的，极大的
explosion/ k splo n/ n. 爆破，爆炸
minus / ma n s/ prep. 减，减去,负的
at an altitude of 海拔高度有……
flatten / fl tn/ v. （使）变平
char /t ɑ r/ v. （使）烧焦
pine forest 松林
acceleration / k sel re n/ n. 加速，加快
2
Look at the pictures and answer the questions.
Black hole黑洞
A black hole is a region of space-time exhibiting gravitational acceleration so strong that nothing, not even light, can escape from it.
Activity 2
Black hole
An astronomical phenomenon whose gravity is so great that not even light can escape it. Usually formed from the collapse of a star.
gravitational/ ɡr v te n( )l/ adj.[力] 重力的，[力] 引力的
acceleration/ k sel re ( )n/n.加速，加快；加速度
escape from逃脱
She managed to escape from the burning car.
她设法从燃烧的汽车里逃了出来。《牛津词典》
2
Look at the pictures and answer the questions.
Search the Internet for an unsolved mystery about nature that interests you. Then talk about it in English. words should be controlled not more than 150 words.
Homework
One of nature's intriguing mysteries is the “Bermuda Triangle”, an area in the Atlantic Ocean where numerous ships and planes have disappeared under unexplained circumstances. Some theories suggest magnetic anomalies, underwater methane eruptions, or even extraterrestrial activity. However, scientists often attribute these incidents to human error, extreme weather, or natural oceanographic features. The lack of concrete evidence keeps the mystery alive, blending science with folklore. While many explanations exist, the Bermuda Triangle remains a fascinating enigma, reminding us of how much we still have to learn about our planet.
One possible version
“百慕大三角”是自然界最令人着迷的谜团之一，在大西洋的一个地区，许多船只和飞机在无法解释的情况下消失了。一些理论认为是地磁异常、水下甲烷喷发，甚至是地外活动。然而，科学家们经常将这些事件归咎于人为失误、极端天气或自然海洋特征。具体证据的缺乏使这个谜团得以延续，将科学与民间传说结合在一起。虽然存在许多解释，但百慕大三角仍然是一个迷人的谜，提醒我们对我们的星球还有多少需要了解。
Sample
The mystery of the Bermuda Triangle has always fascinated me. It's an area in the Atlantic Ocean where numerous ships and airplanes have mysteriously disappeared without a trace. Some theories suggest that strong ocean currents, unusual weather patterns, or even extraterrestrial activity could be responsible.
Personally, I find the idea of natural geophysical phenomena like methane gas releases from the ocean floor or electromagnetic disturbances quite plausible. These could potentially interfere with navigation equipment, leading to disasters. However, despite extensive research, the exact cause remains unknown.
The Bermuda Triangle remains a compelling enigma, reminding us of the vast unknowns still present in our natural world.
Sample
Another possible version
百慕大三角的神秘一直吸引着我。这是大西洋上的一个区域，许多船只和飞机神秘地消失得无影无踪。一些理论认为，强大的洋流、不寻常的天气模式，甚至是外星活动都可能是造成这种现象的原因。
就我个人而言，我觉得海底甲烷气体释放或电磁干扰等自然地球物理现象的想法很有道理。这些可能会干扰导航设备，导致灾难。然而，尽管进行了广泛的研究，确切的原因仍然未知。
百慕大三角仍然是一个引人注目的谜，提醒我们自然界中仍然存在着巨大的未知。
Unit 5 Starting out
Into the unknown
探索未知
导读课件
To watch the video and get the main idea of the video;
To learn some English expressions related to the phenomena or events in the pictures by looking at them;
To talk about your understanding of the four unsolved mysteries based on your existing knowledge.
Learning objectives
civilisation n. 文明（社会） 66
* intrigue v. （因奇特或神秘而）激起……的兴趣，引起……的好奇心 66
bury v. 将……埋在下面 66
* pyramid n. 金字塔 66
astronomy n. 天文学 67
canal n. 运河 68
* tropical adj. 来自热带的；产于热带的 68
* cyclone n. 气旋；旋风 68
* megadrought n. 超级干旱 68
* downfall n. 衰败 68
ruin n. 残垣断壁，废墟 68
fall into ruin （因无人照料而）衰落，败落 68
abandon v. 离弃，逃离 68
dismiss v. 拒绝考虑，否定 68
expansion n. 扩大；增加 69
Words and expressions
1
Watch the video and answer the questions.
What natural phenomena are mentioned in the video
How were these explained in the past What are the scientific explanations behind them
Activity 1
Activity 1
1
Watch the video and answer the questions.
视频脚本
Ancient Mysteries
①A flash of lightning, a loud clap of thunder, the earth moving underneath our feet... These natural phenomena might be frightening, but we feel safer knowing the science behind them. In ancient times, however, such natural phenomena were believed to be the work of magnificent beasts and supernatural beings.
②Native 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, which are very large areas of Earth's outer crust.
古老的秘密
①一道闪电，一声雷鸣，大地在我们脚下移动……这些自然现象可能很可怕，但我们知道它们背后的科学原理会更安全。 然而，在古代，这种自然现象被认为是宏伟的野兽和超自然生物的杰作。
②印第安人过去认为地震是由一种叫做雷鸟的大鸟和鲸鱼之间的斗争引起的。 古老的日本人相信地震是由一只巨大的鲶鱼的运动引起的，它把世界驮在背上。 科学家们现在知道，地震实际上是由构造板块的运动引起的，构造板块是地球外壳的一大片区域。
Activity 1
1
Watch the video and answer the questions.
视频脚本
③In 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. The ancient Chinese would bang on drums to scare away this ferocious creature. In fact, solar eclipses happen when the Moon passes between Earth and the Sun, temporarily blocking the Sun's light.
④In 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.
③在许多文化中，古老的信仰认为日食是由一种生物吃掉太阳引起的。 在越南，这种生物是一只巨大的青蛙，在挪威是一只狼，在中国是一只巨大的狗。 古代中国人会敲鼓来吓走这种凶猛的生物。 事实上，当月球经过地球和太阳之间时，日食就会发生，暂时阻挡了太阳的光线。
④在中世纪的欧洲，人们认为是超自然的力量造成了打雷和闪电。 这是未来艰难时期的征兆。 现代科学告诉我们，闪电是一种电荷在云之间移动，或者在云与地球之间移动。 雷声是由闪电引起的冲击波。
Activity 1
1
Watch the video and answer the questions.
视频脚本
⑤And finally, we've all heard tales of water appearing in the desert ahead of thirsty travellers. They race towards it, only to find the water has disappeared. In Ancient China, people believed that this was caused by the breath of a dragon. These days, all schoolchildren learn that a "mirage" happens when layers of air with varying temperatures cause light to bend. Some of these students will grow up to be the scientists of tomorrow, exploring our natural world, and solving more of its mysteries.
⑤最后，我们都听说过这样的故事：在口渴的旅行者之前，沙漠里就出现了水。 他们冲向它，却发现水已经消失了。 在中国古代，人们认为这是由龙的呼吸引起的。 如今，所有的学生都知道，当不同温度的空气层导致光线弯曲时，就会出现“海市蜃楼”。 这些学生中的一些人将成长为未来的科学家，探索我们的自然世界，解决更多的谜团。
Activity 1
1
Watch the video and answer the questions.
1 What natural phenomena are mentioned in the video
2 How were these explained in the past What are the scientific explanations behind them
The natural phenomena that are mentioned in the video include: the earthquake, the solar eclipse, thunder and lightning, and the mirage.
In the past, such natural phenomena were believed to be the work of magnificent beasts and supernatural beings，which all varies from place to place.There is now a general scientific consensus on these phenomena.
Activity 1
1
Watch the video and answer the questions.
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.
2 How were these explained in the past What are the scientific explanations behind them
Activity 1
1
Watch the video and answer the questions.
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.
2 How were these explained in the past What are the scientific explanations behind them
Activity 1
1
Watch the video and answer the questions.
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.
2 How were these explained in the past What are the scientific explanations behind them
Activity 1
1
Watch the video and answer the questions.
For the mirage:
In Ancient China, people 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 1
2 How were these explained in the past What are the scientific explanations behind them
1
Watch the video and answer the questions.
The modern scientific explanations
1
2
3
4
Scientists now know that earthquakes are caused by the movement of tectonic plates.
In fact, solar eclipses happen when the Moon passes between Earth and the sun temporarily blocking the sun’s light.
Modern science tells us that lightning is an electric charge moving between clouds and the earth. Thunder is a shock wave of sound caused by lightning.
These days, people know that a mirage happens when layers of air with varying temperatures caused light to bend.
Activity 1
2 How were these explained in the past What are the scientific explanations behind them
1
Watch the video and answer the questions.
2
Look at the pictures and answer the questions.
Activity 2
1 What do you know about these mysteries
2 What other unsolved mysteries do you know of
3 Which of these do you most want to investigate
Atlantis
Atlantis is a legendary city, which is described in the work of the Greek philosopher Plato. The story of Atlantis with its fabulously wealthy and advanced civilisation which was swept into the sea to be lost for ever has captured the imagination of readers for over two millennia.
Activity 2
legendary / led nderi/adj. 非常有名的,传说中的
fabulously / f bj l sli/ adj.难以置信的
civilisation n. 文明；文明社会
sweep -swept- swept v.横扫
capture v. 俘获，捕获；夺取，占领
millennia /m leni / n.千年
It's been disturbed for the first time in millennia.
这是千年来第一次被打扰。
2
Look at the pictures and answer the questions.
Nazca Lines
The Nazca Lines are a collection of giant geometric patterns and animal shapes. Drawn into the landscapes of southern Peru, the majority of the lines are believed to be the work of the Nazca people around 1AD to 700. Designated a UNESCO World Heritage Site in 1994, numerous studies and theories have so far not explained the reason why the lines were created.
Activity 2
giant/ d a nt/ n. （传说中的）巨人
geometric / d i metr k/ adj. 几何图形的；几何的
majority /m d r ti/ n. 大多数
designate / dez ɡne t/ v. 把……定名为
numerous / nu m r s/ adj. 众多的，许多的
theory/ θi ri/ n. 学说，理论
gravitational/ ɡr v te nl/ adj. [力] 重力的，[力] 引力的
2
Look at the pictures and answer the questions.
Tunguska event通古斯大爆炸
Tunguska event, enormous explosion that is estimated to have occurred at 7:14 am plus or minus one minute on 30 June 1908, at an altitude of 5–10 kilometres, flattening some 2,000 square kilometres and charring more than 100 square kilometres of pine forest near the Podkamennaya Tunguska River in Central Siberia, Russia.
Activity 2
enormous / n rm s/ adj. 巨大的，极大的
explosion/ k splo n/ n. 爆破，爆炸
minus / ma n s/ prep. 减，减去,负的
at an altitude of 海拔高度有……
flatten / fl tn/ v. （使）变平
char /t ɑ r/ v. （使）烧焦
pine forest 松林
acceleration / k sel re n/ n. 加速，加快
2
Look at the pictures and answer the questions.
Black hole黑洞
A black hole is a region of space-time exhibiting gravitational acceleration so strong that nothing, not even light, can escape from it.
Activity 2
Black hole
An astronomical phenomenon whose gravity is so great that not even light can escape it. Usually formed from the collapse of a star.
gravitational/ ɡr v te n( )l/ adj.[力] 重力的，[力] 引力的
acceleration/ k sel re ( )n/n.加速，加快；加速度
escape from逃脱
She managed to escape from the burning car.
她设法从燃烧的汽车里逃了出来。《牛津词典》
2
Look at the pictures and answer the questions.
Search the Internet for an unsolved mystery about nature that interests you. Then talk about it in English. words should be controlled not more than 150 words.
Homework
One of nature's intriguing mysteries is the “Bermuda Triangle”, an area in the Atlantic Ocean where numerous ships and planes have disappeared under unexplained circumstances. Some theories suggest magnetic anomalies, underwater methane eruptions, or even extraterrestrial activity. However, scientists often attribute these incidents to human error, extreme weather, or natural oceanographic features. The lack of concrete evidence keeps the mystery alive, blending science with folklore. While many explanations exist, the Bermuda Triangle remains a fascinating enigma, reminding us of how much we still have to learn about our planet.
One possible version
“百慕大三角”是自然界最令人着迷的谜团之一，在大西洋的一个地区，许多船只和飞机在无法解释的情况下消失了。一些理论认为是地磁异常、水下甲烷喷发，甚至是地外活动。然而，科学家们经常将这些事件归咎于人为失误、极端天气或自然海洋特征。具体证据的缺乏使这个谜团得以延续，将科学与民间传说结合在一起。虽然存在许多解释，但百慕大三角仍然是一个迷人的谜，提醒我们对我们的星球还有多少需要了解。
Sample
The mystery of the Bermuda Triangle has always fascinated me. It's an area in the Atlantic Ocean where numerous ships and airplanes have mysteriously disappeared without a trace. Some theories suggest that strong ocean currents, unusual weather patterns, or even extraterrestrial activity could be responsible.
Personally, I find the idea of natural geophysical phenomena like methane gas releases from the ocean floor or electromagnetic disturbances quite plausible. These could potentially interfere with navigation equipment, leading to disasters. However, despite extensive research, the exact cause remains unknown.
The Bermuda Triangle remains a compelling enigma, reminding us of the vast unknowns still present in our natural world.
Sample
Another possible version
百慕大三角的神秘一直吸引着我。这是大西洋上的一个区域，许多船只和飞机神秘地消失得无影无踪。一些理论认为，强大的洋流、不寻常的天气模式，甚至是外星活动都可能是造成这种现象的原因。
就我个人而言，我觉得海底甲烷气体释放或电磁干扰等自然地球物理现象的想法很有道理。这些可能会干扰导航设备，导致灾难。然而，尽管进行了广泛的研究，确切的原因仍然未知。
百慕大三角仍然是一个引人注目的谜，提醒我们自然界中仍然存在着巨大的未知。