外研版（2019）选择性必修 第二册Unit 5 A delicate world Starting out 课件（共24张，内嵌音视频）
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| 名称 | 外研版（2019）选择性必修 第二册Unit 5 A delicate world Starting out 课件（共24张，内嵌音视频） |  | |
| 格式 | pptx | ||
| 文件大小 | 28.7MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-11-21 11:46:42 | ||
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(共24张PPT)
Unit 5 Starting out
A delicate world
脆弱的星球
导读课件
Unit 5 A delicate world
easily broken or damaged
易碎的，脆弱的
We should treat the Earth well,
but how to treat it well
Now let’s learn Unit 5 A delicate world.
To analyse the reasons why the changes of Aral Sea’s satellite images happened;
To discuss the actions we can take to protect our earth;
To learn how the chaos was caused in Macquarie Island and how people tried to protect the island;
To learn to describe a story by using a mind-map;
To realize the great effect of humans’ actions on ecology and the importance of ecological balance.
Learning objectives
Word and expressions
halfway adj. 中间的，半途的 50
dramatically adv. 显著地 50
heritage n. 遗产；传统 50
inhabitant n. 栖居的动物 50
penguin n. 企鹅 50
habitat n. 栖息地 50
rat n. 大老鼠 50
subsequently adv. 后来，随后 50
appetite n. 胃口，食欲 50
multiply v. （使）大大增加，倍增 50
vegetation n. 植物，草木（总称） 50
erosion n. 侵蚀 50
parakeet n. 长尾（小）鹦鹉 51
chaos n. 大混乱；紊乱 51
conservation n. 保护 51
virus n. 病毒 51
decrease v. （使）变小，减少 51
trap n. 夹子，陷阱 51
departure n. 离开 51
immunity n. 免疫力 51
explode v. 突然增加 51
collapse v. 倒坍；塌下 51
substantial adj. 大量的，多的 51
incident n. 事件 51
intervention n. 干预，介入 51
owe v. 应该做；对...负有...的义务 51
postscript n. 附言 51
pest n. 有害小动物；害虫 51
ecology n. 生态 51
What is an ecosystem(生态系统)
How many ecosystems do you know
Lead-in
A wonderful serenity has taken possess
tundra /'t ndr / 冻原
glassland 温带草原
steppe 大草原
A wonderful serenity has taken possess
taiga /'ta ɡ / 北方针叶林
prairie / pre ri/ 北美草原
intertidal zone / nt 'ta d l/ 潮间带
A wonderful serenity has taken possess
savannah /s 'v n / 稀树草原
desert / dez t/ 沙漠
subtidal zone /s b'ta dl/ 潮下带
A wonderful serenity has taken possess
continental shelf 大陆架
tropical rain forests 热带雨林
wetlands 湿地
A wonderful serenity has taken possess
deep ocean zones 深海带
Artic ice packs 北极浮冰
A wonderful serenity has taken possess
estuary / estju ri/ 港湾
temperate rain forests 温带雨林
marine mud flat 海滨泥滩
deciduous forests 落叶林
The environment where different types of plants, animals and species live.
Different kinds of animals and plants in a balanced environment.
Ecosystem
Biodiversity
Match the definitions（定义）with the terms (术语).
生态系统
生物多样性
The _______ (more/less) different kinds of living things in the ____________, the more successful it is.
more
ecosystem
Biodiversity
What are they on Earth
All the living things on the Earth live in __________.
ecosystems
Watch the video and answer the questions.
1 Are humans part of Earth’s ecosystems Why
2 In what ways can humans affect ecosystems
1
Watch the video and answer the questions.
1 Are humans part of Earth’s ecosystems(生态系统) Why
2 In what ways can humans affect ecosystems
Yes, because all living things live in ecosystems and humans are living things. So humans are part of Earth’s ecosystem.
Humans affect ecosystems in positive and negative ways. On the one hand, they plant trees, protect animals, and recycle things. But on the other hand, air and water pollution and water waste from humans do harm to ecosystems.
1
We can think of an ecosystem as this wooden puzzle game.
Ecosystems are a little bit like this game of sticks(游戏棒)
What does the writer suggest
The things that live in ecosystems ____________ each other. They are _________.
connected
depend on
The whole thing represents an ___________. The woods stand for ________ including _________who fit all together and __________ each other to live. If a species go ________, it you disappear from the ecosystem. Losing few of them __________cause too much trouble.
humans
ecosystem
depend on
extinct
will not
species
But losing too many will make the ____________rickety(摇晃的).Humans have to manage the ecosystem extremely ___________. If not, it will _______and there won’t be any place for human beings
ecosystem
carefully
fall
Connected Together
Between where I am standing and wherever you are sitting, there are millions of different types of plants and animals, millions of different species, all living together in the environment, in something we call an ecosystem. Now in order for an ecosystem to be successful, in order for it to be healthy, it has to have different kinds of plants and animals - lots of different kinds of plants and animals... something we call “biodiversity ". Now biodiversity sounds kind of complicated. But if you listen, it also sounds kind of nice.
This is the Earth, our world. All the living things that we know of live here, and they live in ecosystems, places like tundras, taigas, savannahs, grasslands, prairies, deserts, steppes, intertidal zones, subtidal zones, continental shelves, deep ocean zones, estuaries, deciduous forests, temperate rain forests, tropical rain forests, Artic ice packs, wetlands, marine mud flats and cities. That's a lot of environments but there are a lot of living things to fill them up. The Earth's environments are just crowded with life. Living things take hold everywhere they can.
Here's an insect living right on top of blades of grass. It's a living thing that lives on other living things. See, environments always have living parts and non-living parts. Some animals live on top of plants, some animals live in the water, some plants grow on rocks. It's all part of the ecosystem.
视频脚本
相互配合，赖以生存
在我站着的地方和你们坐着的地方之间，有数百万种不同种类的植物和动物，数百万种不同的物种，都生活在一个我们称之为生态系统的环境中。为了一个生态系统的成功，为了它的健康，它必须有不同种类的植物和动物——很多不同种类的植物和动物……我们称之为“生物多样性”。生物多样性听起来有点复杂。但如果你仔细听，它听起来也很不错。
这是地球，我们的世界。我们所知道的所有生物都生活在这里，它们生活在生态系统中，像冻土带、针叶林、稀树大草原、草原、大草原、沙漠、草原、潮间带、潮下带、大陆架、深海区、河口、落叶林、温带雨林、热带雨林、北极冰原、湿地、海洋泥滩和城市。这是很多环境，但有很多生物填满它们。地球上到处都是生命。生物会在任何地方扎根。
这是一只生活在草叶上的昆虫。它是一种以其他生物为食的生物。环境总是有生物部分和非生物部分。有些动物生活在植物上，有些动物生活在水中，有些植物生长在岩石上。这都是生态系统的一部分。
视频脚本
Connected Together
Nearly three-quarters of the world's surface is covered with water. So most of the world's living things live here, just one ecosystem after another. Now [as] near as we can tell, all [the] living things depend on other living things. So the more different kinds of living things in an ecosystem, the more successful it is. We call this “biodiversity”- different kinds of life.
We can think of an ecosystem as this wooden puzzle game. See all the different species They all fit together and they depend on each other to live. And you know, once in a while a species will go extinct, it'll disappear from the ecosystem. You can see how you can lose... a few of those without too much trouble. But [if] you start to lose too many, the whole thing becomes... becomes a little... rickety. Now, where do people fit in Oh, they fit in just about every where. Just about anywhere you can walk, you'll find people living because people are living things and they are part of the ecosystem. So when we go to manage an ecosystem, we have to be careful about how things fit together or there won't be a place for us. We have to be very careful... extremely careful.
Now this hasn't happened yet, but it could.
Ecosystems are a little bit like this game of sticks. You can't take one stick out without disturbing most of the other ones. The things that live in ecosystems depend on each other. They are connected. It's kind of cool!
视频脚本
相互配合，赖以生存
近四分之三的地球表面被水覆盖。所以世界上大多数生物都生活在这里，只是一个又一个的生态系统。现在，据我们所知，所有的生物都依赖于其他生物。所以一个生态系统里的生物种类越多，它就越成功。我们称之为“生物多样性”——不同种类的生命。
我们可以把生态系统想象成这个木制的益智游戏。看到所有不同的物种了吗？它们都相互配合，相互依赖才能生存。你知道，有时候一个物种会灭绝，它会从生态系统中消失。你可以看到你是如何输掉的……不太麻烦就能买到一些。但（如果）你开始失去太多，整个事情就会变得……变得有点…摇摇晃晃的。现在，人们适合在哪里？哦，他们几乎适合任何地方。无论你走到哪里，你都会发现有人在生活，因为人也是生物，他们是生态系统的一部分。所以当我们去管理一个生态系统时，我们必须小心事物如何组合在一起，否则我们就没有立足之地了。我们必须非常小心……非常小心。
现在还没有发生，但有可能发生。
生态系统有点像棍子游戏。你拿掉一根棍子，肯定会影响到其他的。生活在生态系统中的生物相互依赖。他们是有联系的。挺酷的！
视频脚本
Look at the satellite images and answer the questions.
1 What is happening to the area according to the satellite images
2 What do you think a later satellite image would show
What do you think caused
these changes
咸海
2
Satellite Images of Aral Sea, Central Asia
1.What is happening to the area according to the satellite images
Aral Sea is becoming _________ and _________.
smaller
smaller
Satellite Images of Aral Sea, Central Asia
2. What do you think a later satellite image would show
3. What do you think caused these changes
Global Warming
air pollution
deforestation森林砍伐
desertification沙漠化
Satellite Images of Aral Sea, Central Asia
2. What do you think a later satellite image would show
The water area will be smaller.
3. What do you think caused these changes
Maybe it’s due to overexploitation.
/ Perhaps because of overexploitation.
我们应该善待地球；保护地球，人人有责。
We should be kind to the earth and protect the earth, everyone has the responsibility.
Unit 5 Starting out
A delicate world
脆弱的星球
导读课件
Unit 5 A delicate world
easily broken or damaged
易碎的，脆弱的
We should treat the Earth well,
but how to treat it well
Now let’s learn Unit 5 A delicate world.
To analyse the reasons why the changes of Aral Sea’s satellite images happened;
To discuss the actions we can take to protect our earth;
To learn how the chaos was caused in Macquarie Island and how people tried to protect the island;
To learn to describe a story by using a mind-map;
To realize the great effect of humans’ actions on ecology and the importance of ecological balance.
Learning objectives
Word and expressions
halfway adj. 中间的，半途的 50
dramatically adv. 显著地 50
heritage n. 遗产；传统 50
inhabitant n. 栖居的动物 50
penguin n. 企鹅 50
habitat n. 栖息地 50
rat n. 大老鼠 50
subsequently adv. 后来，随后 50
appetite n. 胃口，食欲 50
multiply v. （使）大大增加，倍增 50
vegetation n. 植物，草木（总称） 50
erosion n. 侵蚀 50
parakeet n. 长尾（小）鹦鹉 51
chaos n. 大混乱；紊乱 51
conservation n. 保护 51
virus n. 病毒 51
decrease v. （使）变小，减少 51
trap n. 夹子，陷阱 51
departure n. 离开 51
immunity n. 免疫力 51
explode v. 突然增加 51
collapse v. 倒坍；塌下 51
substantial adj. 大量的，多的 51
incident n. 事件 51
intervention n. 干预，介入 51
owe v. 应该做；对...负有...的义务 51
postscript n. 附言 51
pest n. 有害小动物；害虫 51
ecology n. 生态 51
What is an ecosystem(生态系统)
How many ecosystems do you know
Lead-in
A wonderful serenity has taken possess
tundra /'t ndr / 冻原
glassland 温带草原
steppe 大草原
A wonderful serenity has taken possess
taiga /'ta ɡ / 北方针叶林
prairie / pre ri/ 北美草原
intertidal zone / nt 'ta d l/ 潮间带
A wonderful serenity has taken possess
savannah /s 'v n / 稀树草原
desert / dez t/ 沙漠
subtidal zone /s b'ta dl/ 潮下带
A wonderful serenity has taken possess
continental shelf 大陆架
tropical rain forests 热带雨林
wetlands 湿地
A wonderful serenity has taken possess
deep ocean zones 深海带
Artic ice packs 北极浮冰
A wonderful serenity has taken possess
estuary / estju ri/ 港湾
temperate rain forests 温带雨林
marine mud flat 海滨泥滩
deciduous forests 落叶林
The environment where different types of plants, animals and species live.
Different kinds of animals and plants in a balanced environment.
Ecosystem
Biodiversity
Match the definitions（定义）with the terms (术语).
生态系统
生物多样性
The _______ (more/less) different kinds of living things in the ____________, the more successful it is.
more
ecosystem
Biodiversity
What are they on Earth
All the living things on the Earth live in __________.
ecosystems
Watch the video and answer the questions.
1 Are humans part of Earth’s ecosystems Why
2 In what ways can humans affect ecosystems
1
Watch the video and answer the questions.
1 Are humans part of Earth’s ecosystems(生态系统) Why
2 In what ways can humans affect ecosystems
Yes, because all living things live in ecosystems and humans are living things. So humans are part of Earth’s ecosystem.
Humans affect ecosystems in positive and negative ways. On the one hand, they plant trees, protect animals, and recycle things. But on the other hand, air and water pollution and water waste from humans do harm to ecosystems.
1
We can think of an ecosystem as this wooden puzzle game.
Ecosystems are a little bit like this game of sticks(游戏棒)
What does the writer suggest
The things that live in ecosystems ____________ each other. They are _________.
connected
depend on
The whole thing represents an ___________. The woods stand for ________ including _________who fit all together and __________ each other to live. If a species go ________, it you disappear from the ecosystem. Losing few of them __________cause too much trouble.
humans
ecosystem
depend on
extinct
will not
species
But losing too many will make the ____________rickety(摇晃的).Humans have to manage the ecosystem extremely ___________. If not, it will _______and there won’t be any place for human beings
ecosystem
carefully
fall
Connected Together
Between where I am standing and wherever you are sitting, there are millions of different types of plants and animals, millions of different species, all living together in the environment, in something we call an ecosystem. Now in order for an ecosystem to be successful, in order for it to be healthy, it has to have different kinds of plants and animals - lots of different kinds of plants and animals... something we call “biodiversity ". Now biodiversity sounds kind of complicated. But if you listen, it also sounds kind of nice.
This is the Earth, our world. All the living things that we know of live here, and they live in ecosystems, places like tundras, taigas, savannahs, grasslands, prairies, deserts, steppes, intertidal zones, subtidal zones, continental shelves, deep ocean zones, estuaries, deciduous forests, temperate rain forests, tropical rain forests, Artic ice packs, wetlands, marine mud flats and cities. That's a lot of environments but there are a lot of living things to fill them up. The Earth's environments are just crowded with life. Living things take hold everywhere they can.
Here's an insect living right on top of blades of grass. It's a living thing that lives on other living things. See, environments always have living parts and non-living parts. Some animals live on top of plants, some animals live in the water, some plants grow on rocks. It's all part of the ecosystem.
视频脚本
相互配合，赖以生存
在我站着的地方和你们坐着的地方之间，有数百万种不同种类的植物和动物，数百万种不同的物种，都生活在一个我们称之为生态系统的环境中。为了一个生态系统的成功，为了它的健康，它必须有不同种类的植物和动物——很多不同种类的植物和动物……我们称之为“生物多样性”。生物多样性听起来有点复杂。但如果你仔细听，它听起来也很不错。
这是地球，我们的世界。我们所知道的所有生物都生活在这里，它们生活在生态系统中，像冻土带、针叶林、稀树大草原、草原、大草原、沙漠、草原、潮间带、潮下带、大陆架、深海区、河口、落叶林、温带雨林、热带雨林、北极冰原、湿地、海洋泥滩和城市。这是很多环境，但有很多生物填满它们。地球上到处都是生命。生物会在任何地方扎根。
这是一只生活在草叶上的昆虫。它是一种以其他生物为食的生物。环境总是有生物部分和非生物部分。有些动物生活在植物上，有些动物生活在水中，有些植物生长在岩石上。这都是生态系统的一部分。
视频脚本
Connected Together
Nearly three-quarters of the world's surface is covered with water. So most of the world's living things live here, just one ecosystem after another. Now [as] near as we can tell, all [the] living things depend on other living things. So the more different kinds of living things in an ecosystem, the more successful it is. We call this “biodiversity”- different kinds of life.
We can think of an ecosystem as this wooden puzzle game. See all the different species They all fit together and they depend on each other to live. And you know, once in a while a species will go extinct, it'll disappear from the ecosystem. You can see how you can lose... a few of those without too much trouble. But [if] you start to lose too many, the whole thing becomes... becomes a little... rickety. Now, where do people fit in Oh, they fit in just about every where. Just about anywhere you can walk, you'll find people living because people are living things and they are part of the ecosystem. So when we go to manage an ecosystem, we have to be careful about how things fit together or there won't be a place for us. We have to be very careful... extremely careful.
Now this hasn't happened yet, but it could.
Ecosystems are a little bit like this game of sticks. You can't take one stick out without disturbing most of the other ones. The things that live in ecosystems depend on each other. They are connected. It's kind of cool!
视频脚本
相互配合，赖以生存
近四分之三的地球表面被水覆盖。所以世界上大多数生物都生活在这里，只是一个又一个的生态系统。现在，据我们所知，所有的生物都依赖于其他生物。所以一个生态系统里的生物种类越多，它就越成功。我们称之为“生物多样性”——不同种类的生命。
我们可以把生态系统想象成这个木制的益智游戏。看到所有不同的物种了吗？它们都相互配合，相互依赖才能生存。你知道，有时候一个物种会灭绝，它会从生态系统中消失。你可以看到你是如何输掉的……不太麻烦就能买到一些。但（如果）你开始失去太多，整个事情就会变得……变得有点…摇摇晃晃的。现在，人们适合在哪里？哦，他们几乎适合任何地方。无论你走到哪里，你都会发现有人在生活，因为人也是生物，他们是生态系统的一部分。所以当我们去管理一个生态系统时，我们必须小心事物如何组合在一起，否则我们就没有立足之地了。我们必须非常小心……非常小心。
现在还没有发生，但有可能发生。
生态系统有点像棍子游戏。你拿掉一根棍子，肯定会影响到其他的。生活在生态系统中的生物相互依赖。他们是有联系的。挺酷的！
视频脚本
Look at the satellite images and answer the questions.
1 What is happening to the area according to the satellite images
2 What do you think a later satellite image would show
What do you think caused
these changes
咸海
2
Satellite Images of Aral Sea, Central Asia
1.What is happening to the area according to the satellite images
Aral Sea is becoming _________ and _________.
smaller
smaller
Satellite Images of Aral Sea, Central Asia
2. What do you think a later satellite image would show
3. What do you think caused these changes
Global Warming
air pollution
deforestation森林砍伐
desertification沙漠化
Satellite Images of Aral Sea, Central Asia
2. What do you think a later satellite image would show
The water area will be smaller.
3. What do you think caused these changes
Maybe it’s due to overexploitation.
/ Perhaps because of overexploitation.
我们应该善待地球；保护地球，人人有责。
We should be kind to the earth and protect the earth, everyone has the responsibility.