外研版（2019）选择性必修 第二册Unit 5 A delicate world Using language 课件（共41张，内嵌音频）
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| 名称 | 外研版（2019）选择性必修 第二册Unit 5 A delicate world Using language 课件（共41张，内嵌音频） |  | |
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| 科目 | 英语 | ||
| 更新时间 | 2024-11-21 11:47:17 | ||
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(共41张PPT)
Unit 5 A delicate world
Using language
To learn the use of “it” as an empty object.
To distinguish the usage of it as an empty object by analysing the sentences from reading passage.
To answer some questions about food chain between living things.
To listen to a conversation about bees and learn some expressions from the conversation.
To talk about what would happen to the ecosystem if another species died out.
Learning objectives
It as an empty object
It 作形式宾语
1. What does “it” refer to in sentences (a) and (c)
Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage.
a No visitor would think it surprising that the island is a UNESCO World Heritage Site.
b No visitor would think that the island being a UNESCO World Heritage Site is surprising.
------------------------------------------------------------------------------------------------------------------
c Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
d Experts felt to come up with a plan to remove all the rabbits from the island was necessary.
In sentence (a), “it” refers to “that the island is a UNESCO World Heritage Site”.
In sentence (c), “it” refers to “to come up with a plan to remove all the rabbits from
the island”.
1
2. What is the difference between the sentences in each group
a No visitor would think it surprising that the island is a UNESCO World Heritage Site.
b No visitor would think that the island being a UNESCO World Heritage Site is surprising.
------------------------------------------------------------------------------------------------------------------
c Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
d Experts felt to come up with a plan to remove all the rabbits from the island was necessary.
The sentences with “it” as an empty object are well balanced in structure.
Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage.
1
83%
58%
No visitor would think it surprising that the island
is a UNESCO World Heritage Site.
c. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
宾语从句
不定式
Analyze the structure of the sentences .
主语+动词+it+宾语补足语+真正的宾语
It 作形式宾语
用法：当不定式、动名词或从句在某个句子中作宾语时，为了保持句子的结构平衡，常用it作为形式宾语，而将真正的宾语放到句子后部去。
（it 没有具体的意义，仅用于维持句子结构平衡。)
构成结构为：
动词+it+宾语补足语+真正的宾语
It作形式宾语条件
条件
真正的宾语是
有宾语补足语
不定式
动名词
从句
具备了这两个条件， 形式宾语it一定要用。
※it 作形式宾语时， 需具备两个条件：
①真正的宾主是不定式、动名词或从句。
②有宾语补足语
具备了这两个条件， 形式宾语it一定要用。
1. it作形式宾语代替动词不定式。
常用动词不定式作真正宾语的句型：
动词＋it＋形容词/名词＋（for sb） to do sth
I find it pleasant to work with him.
我觉得和他一起工作很愉快。
He makes it a rule never to borrow money from others.
他的规矩是从不向别人借钱。
He likes to stay up late， so he often feels sleepy， which makes it difficult for him to concentrate on what he is doing.
他喜欢熬夜，所以他经常感到困倦，这使他很难集中精力在他正在做的事情上。
2. it作形式宾语代替动词－ing形式。
常用动词－ing形式作真正宾语的句型：
动词＋it＋no good/no use/no value/a waste of time/hard work/worthwhile＋doing sth
I think it no good spending too much time watching TV.
我认为花太多时间看电视是没有好处的。
He thought it no use trying to multiply their number.
他认为企图增加它们的数量没有用。
3.it作形式宾语代替从句。
（1）当从句在复合宾语结构中作某些动词（如think,make, find等）的宾语时，it作形式宾语代替从句。
We all thought it a pity that the conference should have been cancelled.
会议取消了，我们都感到很遗憾。
I find it strange that she doesn’t want to go.
她竟然不想去，我觉得奇怪。
名师点津
上述句中it后面需要有名词或形容词作宾语补足语。
3 it 代替宾语从句
1）某些表示“喜，怒，哀，乐”的动词， 如like, enjoy, love, hate, appreciate等，往往不能直接接宾语从句，而是先用it作形式宾语， 再把真正的宾语从句放在后面。
I don’t like it that he’s so lazy.
I hate it when my mother asks me to eat eggs.
We really appreciated it when she offered to help .
2) 在一些“动词＋介词”构成的短语，如：depend on，rely on，see to（照料；处理），stick to，take ...for granted，owe ...to sb, answer for（因...而受罚；对...负责）等常先接it，再接that 引导的从句。
You may depend on it that we shall always help you.
Would you see to it that she gets home early
She insisted on it that she was innocent.
3) 动词+it+过去分词+从句
He made it known to everyone that he was right.
Summary
活学活用
语法填空：
1. I would appreciate ______ if you could let me know in advance whether or not you will come.
2. Susan made _____ clear to me that she wished to make a new life
for herself.
3. We feel it our duty ________(make) our country a better place.
4. I find it hard ______ me to get on well with my classmates.
5. I think it no use ________ (talk) about it with them.
6. We find it essential ______ we should learn to spend money wisely.
7. The right level of background noise may interrupt our normal patterns of thinking just enough to allow our imaginations to wander, withough making it impossible ________(focus).
it
it
to make
for
talking
that
to focus
Translate the following sentences.
1. 我认为保护环境非常重要。
I think it very important to protect the environment.
2. 以前我们总是理所当然地认为自然资源取之不尽，这对大自然造成了巨大的伤害。
We took it for granted that the natural resources were endless, which caused great harm to nature.
3. 我们一定要确保采取有效措施阻止污染。
We should see to it that effective measures should be taken to
prevent pollution.
活学活用
Rewrite the underlined parts using it as an empty object.
The red-eared slider, a species of freshwater turtle, is native to the Southern United States and Northern Mexico. Due to its cute appearance, many people think keeping this turtle as a pet is a good idea. Recent years have seen more and more pet sliders escaping or being released from homes, and some owners believe to release them into the wild is no big issue.
These days, people have found to release these turtles into the wild is a threat to other species. Experts consider owners keeping their pets in an enclosed area important, and anyone unable to keep their pets should take them to an appropriate animal shelter.
2
1 many people think keeping this turtle as a pet is a good idea
改：
many people think it a good idea to keep this turtle as a pet
2 believe to release them into the wild is no big issue
改：
believe it no big issue to release them into the wild
3 people have found to release these turtles into the wild is a threat to other species
改：
people have found it a threat to other species to release these turtles into the wild
4 Experts consider owners keeping their pets in an enclosed area important
改：
Experts consider it important that owners should keep their pets in an enclosed area
Rewrite the underlined parts using it as an empty object.
2
Look at the pictures of the Saihanba National Forest Park and describe its changes using it as an empty object where appropriate.
present day
1960s
3
nouns / adjectives
to do / that
breakthrough
impossible
likely
unrealistic
...
grow
investigate
plant trees
transform
...
I think it a breakthrough to transform a desert into a forest ...
You may refer to the words and expressions in the table for help.
Now work in pairs. Try to write your own articles.
Describe how a place you know has changed using it as an empty object where appropriate.
4
Ecosystems
生态系统
Look at the diagram and pay attention to the words and expressions in bold.
5
Now answer the questions according to the diagram.
1. What does the diagram show
The diagram shows a food chain – the connection between the living things.
2. What are the relationships between the living things
The living things are closely connected with each other by the food they eat. Secondary consumers prey on primary consumers, primary consumers feed on producers, and producers absorb light from the sun, and water and dissolved nutrients from the soil, which are provided by decomposers.
Complete the passage with the correct form of the words and expressions in Activity 5.
In a woodland ecosystem, trees and other plants are producers. They 1 ________ water, take in nutrients from the soil, and energy from the sun. Insects are an example of a primary consumer. They 2 _________ the producers to provide food for them, and are 3 ________ by secondary consumers: small mammals and birds. They 4__________ the primary consumers. Worms, fungi and bacteria are decomposers. They 5 __________ animal waste and the remains of living things. The chemicals these decomposers 6 _______ fertilise the soil and give the plants the nutrients they need to grow.
absorb
rely on
fed on
prey on
break down
release
6
One of the oldest species in the ecosystem, the honey bee has been in existence for millions of years.
A honey bee can fly as fast as 24 kilometres per hour and its wings can beat 200 times per second.
In just one journey to collect pollen and nectar, one single honey bee can pollinate as many as 50 to 100 flowers.
Did You Know
Did You Know
Listen to the conversation and choose the true statements.
1. Bees are very important to our food supply because they
provide honey.
2. The bee population is declining.
3. Without bees, humans would die out.
4. All human crops depend on bees for pollination.
5. If bees became extinct, other insects could pollinate enough crops.
6. Humans are responsible for the decline in the bee population.
7
1. Bees are very important to our food supply because they provide honey.
Meg: It's a fact!! I watched a nature documentary all about it the other evening. Bees are very important to our food supply.
Ollie: How can that be possible Humans won't die out just because there's no honey!
Meg: Bees don't just make honey. Don't forget that bees are also
responsible for pollinating plants. Without them, crops would be unable to reproduce.
×
Listen to the conversation and choose the true statements.
7
Meg: I'm afraid you're wrong. The bee population is declining very quickly. According to statistics, bee numbers in the US have fallen by 17% in just one year.
2. The bee population is declining.
√
3. Without bees, humans would die out.
Ollie: Are you sure about that data It sounds rather exaggerated.
Meg: Watch the documentary and check it out for yourself if you don't believe me. Without bees, numerous plant species would die out. Animals that live on the crops would die out, and we wouldn't have enough to eat.
√
Listen to the conversation and choose the true statements.
7
4. All human crops depend on bees for pollination.
Meg: Well, there are other insects that pollinate plants, but it's unlikely that they would be able to fully compensate for the loss of bees. Bees are responsible for pollinating about 70% of the species of crops.
5. If bees became extinct, other insects could pollinate enough crops.
×
×
Listen to the conversation and choose the true statements.
7
6. Humans are responsible for the decline in the bee population.
Ollie: Gosh! What caused that
Meg: A combination of things, really, but it's mainly due to damage to their habitats caused by pesticides and climate change.
Ollie: So human activity is the main cause
Meg: That's right.
Ollie: Well, in that case, we'd better do something before it's too late.
√
Listen to the conversation and choose the true statements.
7
Listen to the conversation and choose the true statements.
1. Bees are very important to our food supply because they
provide honey.
2. The bee population is declining.
3. Without bees, humans would die out.
4. All human crops depend on bees for pollination.
5. If bees became extinct, other insects could pollinate enough crops.
6. Humans are responsible for the decline in the bee population.
√
√
√
7
Listen again and complete the flow chart.
A combination of things damages bee habitats, mainly ___________________________.
pesticides and climate changes
Meg: A combination of things, really, but it's mainly due to damage to their habitats caused by pesticides and climate change.
The bee population is ___________________. According to statistics, bee numbers in the US _________________ in just one year.
Meg: I'm afraid you're wrong. The bee population is declining very
quickly. According to statistics, bee numbers in the US
have fallen by 17% in just one year.
declining very quickly
have fallen by 17%
8
Without bees, crops would _____________________. ___________ would not be able to compensate for the loss of bees, because ________________________________________ of the species of crops.
be unable to reproduce
Other insects
bees are responsible for pollinating about 70%
Meg: Bees don't just make honey. Don't forget that bees are also responsible for pollinating plants. Without them, crops would be unable to reproduce.
Meg: Well, there are other insects that pollinate plants, but it's unlikely that they would be able to fully compensate for the loss of bees. Bees are responsible for pollinating about 70% of the species of crops.
Listen again and complete the flow chart.
8
Animals that live on the crops _____________.
Meg: Watch the documentary and check it out for yourself if you don't believe me. Without bees, numerous plant species would die out. Animals that live on the crops would die out, and we wouldn't have enough to eat.
would die out
Humans have nothing to eat and die out.
Listen again and complete the flow chart.
8
Listen again and pay attention to these expressions.
Ollie: What ! You must be kidding! I don't believe it!
Meg: It's a fact! I watched a nature documentary all about it the other evening. Bees are very important to our food supply.
Meg: Bees don't just make honey. Don't forget that bees are also responsible for pollinating plants...
Ollie: Are you sure about that data It sounds rather exaggerated.
Meg: Watch the documentary and check it out for yourself if you don't believe me...
Meg: I'm afraid you're wrong. The bee population is declining very quickly. According to statistics, bee numbers in the US have fallen by 17% in just one year.
Complete the boxes with the expressions from the conversation.
You must be kidding! Are you sure about ...
I don’t believe it! Check it out for yourself ...
It’s a fact! According to statistics ...
Don’t forget that …
Expressing doubt Responding to doubt
You must be kidding!
I don’t believe it!
Are you sure about ...
It’s a fact!
Don’t forget that…
Check it out for yourself... According to statistics...
9
Work in pairs. Talk about what would happen to the ecosystem if another species died out. Use the words and expressions in this section.
Now think about how your knowledge helped you contribute to the discussion.
10
Meg: Hey Ollie, have you heard that the bee population is declining
Ollie: No, I haven't. But, thinking about it, I hardly ever see bees these days. When I was
little, they seemed to be everywhere!
Meg: If bees die out, humans will die out too.
Ollie: What ! You must be kidding! I don't believe it!
Meg: It's a fact!! I watched a nature documentary all about it the other evening. Bees are
very important to our food supply.
Ollie: How can that be possible Humans won't die out just because there's no honey!
Meg: Bees don't just make honey. Don't forget that bees are also responsible for pollinating
plants. Without them, crop
Listening text
Ollie: But surely there are other ways of getting these crops to reproduce. Does
it have to be bees
Meg: Well, there are other insects that pollinate plants, but it's unlikely that
they would be able to fully compensate for the loss of bees.Bees are
responsible for pollinating about 70% of the species of crops.
Ollie: Are you sure about that data It sounds rather exaggerated.
Meg: Watch the documentary and check it out for yourself if you don't believe
me. Without bees, numerous plant species would die out. Animals that
live on the crops would die out, and we wouldn't have enough to eat.
Listening text
Ollie: Seriously That's scary! But looking on the bright side, there are millions and millions of bees. They're not going to die out any time soon.
Meg: I'm afraid you're wrong. The bee population is declining very quickly. According to statistics, bee numbers in the US have fallen by 17% in just one year.
Ollie: Gosh! What caused that
Meg: A combination of things, really, but it's mainly due to damage to their habitats caused by pesticides and climate change.
Ollie: So human activity is the main cause
Meg: That's right.
Ollie: Well, in that case, we'd better do something before it's too late.
Listening text
Write a article to talk about ecosystems.
Homework
Unit 5 A delicate world
Using language
To learn the use of “it” as an empty object.
To distinguish the usage of it as an empty object by analysing the sentences from reading passage.
To answer some questions about food chain between living things.
To listen to a conversation about bees and learn some expressions from the conversation.
To talk about what would happen to the ecosystem if another species died out.
Learning objectives
It as an empty object
It 作形式宾语
1. What does “it” refer to in sentences (a) and (c)
Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage.
a No visitor would think it surprising that the island is a UNESCO World Heritage Site.
b No visitor would think that the island being a UNESCO World Heritage Site is surprising.
------------------------------------------------------------------------------------------------------------------
c Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
d Experts felt to come up with a plan to remove all the rabbits from the island was necessary.
In sentence (a), “it” refers to “that the island is a UNESCO World Heritage Site”.
In sentence (c), “it” refers to “to come up with a plan to remove all the rabbits from
the island”.
1
2. What is the difference between the sentences in each group
a No visitor would think it surprising that the island is a UNESCO World Heritage Site.
b No visitor would think that the island being a UNESCO World Heritage Site is surprising.
------------------------------------------------------------------------------------------------------------------
c Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
d Experts felt to come up with a plan to remove all the rabbits from the island was necessary.
The sentences with “it” as an empty object are well balanced in structure.
Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage.
1
83%
58%
No visitor would think it surprising that the island
is a UNESCO World Heritage Site.
c. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
宾语从句
不定式
Analyze the structure of the sentences .
主语+动词+it+宾语补足语+真正的宾语
It 作形式宾语
用法：当不定式、动名词或从句在某个句子中作宾语时，为了保持句子的结构平衡，常用it作为形式宾语，而将真正的宾语放到句子后部去。
（it 没有具体的意义，仅用于维持句子结构平衡。)
构成结构为：
动词+it+宾语补足语+真正的宾语
It作形式宾语条件
条件
真正的宾语是
有宾语补足语
不定式
动名词
从句
具备了这两个条件， 形式宾语it一定要用。
※it 作形式宾语时， 需具备两个条件：
①真正的宾主是不定式、动名词或从句。
②有宾语补足语
具备了这两个条件， 形式宾语it一定要用。
1. it作形式宾语代替动词不定式。
常用动词不定式作真正宾语的句型：
动词＋it＋形容词/名词＋（for sb） to do sth
I find it pleasant to work with him.
我觉得和他一起工作很愉快。
He makes it a rule never to borrow money from others.
他的规矩是从不向别人借钱。
He likes to stay up late， so he often feels sleepy， which makes it difficult for him to concentrate on what he is doing.
他喜欢熬夜，所以他经常感到困倦，这使他很难集中精力在他正在做的事情上。
2. it作形式宾语代替动词－ing形式。
常用动词－ing形式作真正宾语的句型：
动词＋it＋no good/no use/no value/a waste of time/hard work/worthwhile＋doing sth
I think it no good spending too much time watching TV.
我认为花太多时间看电视是没有好处的。
He thought it no use trying to multiply their number.
他认为企图增加它们的数量没有用。
3.it作形式宾语代替从句。
（1）当从句在复合宾语结构中作某些动词（如think,make, find等）的宾语时，it作形式宾语代替从句。
We all thought it a pity that the conference should have been cancelled.
会议取消了，我们都感到很遗憾。
I find it strange that she doesn’t want to go.
她竟然不想去，我觉得奇怪。
名师点津
上述句中it后面需要有名词或形容词作宾语补足语。
3 it 代替宾语从句
1）某些表示“喜，怒，哀，乐”的动词， 如like, enjoy, love, hate, appreciate等，往往不能直接接宾语从句，而是先用it作形式宾语， 再把真正的宾语从句放在后面。
I don’t like it that he’s so lazy.
I hate it when my mother asks me to eat eggs.
We really appreciated it when she offered to help .
2) 在一些“动词＋介词”构成的短语，如：depend on，rely on，see to（照料；处理），stick to，take ...for granted，owe ...to sb, answer for（因...而受罚；对...负责）等常先接it，再接that 引导的从句。
You may depend on it that we shall always help you.
Would you see to it that she gets home early
She insisted on it that she was innocent.
3) 动词+it+过去分词+从句
He made it known to everyone that he was right.
Summary
活学活用
语法填空：
1. I would appreciate ______ if you could let me know in advance whether or not you will come.
2. Susan made _____ clear to me that she wished to make a new life
for herself.
3. We feel it our duty ________(make) our country a better place.
4. I find it hard ______ me to get on well with my classmates.
5. I think it no use ________ (talk) about it with them.
6. We find it essential ______ we should learn to spend money wisely.
7. The right level of background noise may interrupt our normal patterns of thinking just enough to allow our imaginations to wander, withough making it impossible ________(focus).
it
it
to make
for
talking
that
to focus
Translate the following sentences.
1. 我认为保护环境非常重要。
I think it very important to protect the environment.
2. 以前我们总是理所当然地认为自然资源取之不尽，这对大自然造成了巨大的伤害。
We took it for granted that the natural resources were endless, which caused great harm to nature.
3. 我们一定要确保采取有效措施阻止污染。
We should see to it that effective measures should be taken to
prevent pollution.
活学活用
Rewrite the underlined parts using it as an empty object.
The red-eared slider, a species of freshwater turtle, is native to the Southern United States and Northern Mexico. Due to its cute appearance, many people think keeping this turtle as a pet is a good idea. Recent years have seen more and more pet sliders escaping or being released from homes, and some owners believe to release them into the wild is no big issue.
These days, people have found to release these turtles into the wild is a threat to other species. Experts consider owners keeping their pets in an enclosed area important, and anyone unable to keep their pets should take them to an appropriate animal shelter.
2
1 many people think keeping this turtle as a pet is a good idea
改：
many people think it a good idea to keep this turtle as a pet
2 believe to release them into the wild is no big issue
改：
believe it no big issue to release them into the wild
3 people have found to release these turtles into the wild is a threat to other species
改：
people have found it a threat to other species to release these turtles into the wild
4 Experts consider owners keeping their pets in an enclosed area important
改：
Experts consider it important that owners should keep their pets in an enclosed area
Rewrite the underlined parts using it as an empty object.
2
Look at the pictures of the Saihanba National Forest Park and describe its changes using it as an empty object where appropriate.
present day
1960s
3
nouns / adjectives
to do / that
breakthrough
impossible
likely
unrealistic
...
grow
investigate
plant trees
transform
...
I think it a breakthrough to transform a desert into a forest ...
You may refer to the words and expressions in the table for help.
Now work in pairs. Try to write your own articles.
Describe how a place you know has changed using it as an empty object where appropriate.
4
Ecosystems
生态系统
Look at the diagram and pay attention to the words and expressions in bold.
5
Now answer the questions according to the diagram.
1. What does the diagram show
The diagram shows a food chain – the connection between the living things.
2. What are the relationships between the living things
The living things are closely connected with each other by the food they eat. Secondary consumers prey on primary consumers, primary consumers feed on producers, and producers absorb light from the sun, and water and dissolved nutrients from the soil, which are provided by decomposers.
Complete the passage with the correct form of the words and expressions in Activity 5.
In a woodland ecosystem, trees and other plants are producers. They 1 ________ water, take in nutrients from the soil, and energy from the sun. Insects are an example of a primary consumer. They 2 _________ the producers to provide food for them, and are 3 ________ by secondary consumers: small mammals and birds. They 4__________ the primary consumers. Worms, fungi and bacteria are decomposers. They 5 __________ animal waste and the remains of living things. The chemicals these decomposers 6 _______ fertilise the soil and give the plants the nutrients they need to grow.
absorb
rely on
fed on
prey on
break down
release
6
One of the oldest species in the ecosystem, the honey bee has been in existence for millions of years.
A honey bee can fly as fast as 24 kilometres per hour and its wings can beat 200 times per second.
In just one journey to collect pollen and nectar, one single honey bee can pollinate as many as 50 to 100 flowers.
Did You Know
Did You Know
Listen to the conversation and choose the true statements.
1. Bees are very important to our food supply because they
provide honey.
2. The bee population is declining.
3. Without bees, humans would die out.
4. All human crops depend on bees for pollination.
5. If bees became extinct, other insects could pollinate enough crops.
6. Humans are responsible for the decline in the bee population.
7
1. Bees are very important to our food supply because they provide honey.
Meg: It's a fact!! I watched a nature documentary all about it the other evening. Bees are very important to our food supply.
Ollie: How can that be possible Humans won't die out just because there's no honey!
Meg: Bees don't just make honey. Don't forget that bees are also
responsible for pollinating plants. Without them, crops would be unable to reproduce.
×
Listen to the conversation and choose the true statements.
7
Meg: I'm afraid you're wrong. The bee population is declining very quickly. According to statistics, bee numbers in the US have fallen by 17% in just one year.
2. The bee population is declining.
√
3. Without bees, humans would die out.
Ollie: Are you sure about that data It sounds rather exaggerated.
Meg: Watch the documentary and check it out for yourself if you don't believe me. Without bees, numerous plant species would die out. Animals that live on the crops would die out, and we wouldn't have enough to eat.
√
Listen to the conversation and choose the true statements.
7
4. All human crops depend on bees for pollination.
Meg: Well, there are other insects that pollinate plants, but it's unlikely that they would be able to fully compensate for the loss of bees. Bees are responsible for pollinating about 70% of the species of crops.
5. If bees became extinct, other insects could pollinate enough crops.
×
×
Listen to the conversation and choose the true statements.
7
6. Humans are responsible for the decline in the bee population.
Ollie: Gosh! What caused that
Meg: A combination of things, really, but it's mainly due to damage to their habitats caused by pesticides and climate change.
Ollie: So human activity is the main cause
Meg: That's right.
Ollie: Well, in that case, we'd better do something before it's too late.
√
Listen to the conversation and choose the true statements.
7
Listen to the conversation and choose the true statements.
1. Bees are very important to our food supply because they
provide honey.
2. The bee population is declining.
3. Without bees, humans would die out.
4. All human crops depend on bees for pollination.
5. If bees became extinct, other insects could pollinate enough crops.
6. Humans are responsible for the decline in the bee population.
√
√
√
7
Listen again and complete the flow chart.
A combination of things damages bee habitats, mainly ___________________________.
pesticides and climate changes
Meg: A combination of things, really, but it's mainly due to damage to their habitats caused by pesticides and climate change.
The bee population is ___________________. According to statistics, bee numbers in the US _________________ in just one year.
Meg: I'm afraid you're wrong. The bee population is declining very
quickly. According to statistics, bee numbers in the US
have fallen by 17% in just one year.
declining very quickly
have fallen by 17%
8
Without bees, crops would _____________________. ___________ would not be able to compensate for the loss of bees, because ________________________________________ of the species of crops.
be unable to reproduce
Other insects
bees are responsible for pollinating about 70%
Meg: Bees don't just make honey. Don't forget that bees are also responsible for pollinating plants. Without them, crops would be unable to reproduce.
Meg: Well, there are other insects that pollinate plants, but it's unlikely that they would be able to fully compensate for the loss of bees. Bees are responsible for pollinating about 70% of the species of crops.
Listen again and complete the flow chart.
8
Animals that live on the crops _____________.
Meg: Watch the documentary and check it out for yourself if you don't believe me. Without bees, numerous plant species would die out. Animals that live on the crops would die out, and we wouldn't have enough to eat.
would die out
Humans have nothing to eat and die out.
Listen again and complete the flow chart.
8
Listen again and pay attention to these expressions.
Ollie: What ! You must be kidding! I don't believe it!
Meg: It's a fact! I watched a nature documentary all about it the other evening. Bees are very important to our food supply.
Meg: Bees don't just make honey. Don't forget that bees are also responsible for pollinating plants...
Ollie: Are you sure about that data It sounds rather exaggerated.
Meg: Watch the documentary and check it out for yourself if you don't believe me...
Meg: I'm afraid you're wrong. The bee population is declining very quickly. According to statistics, bee numbers in the US have fallen by 17% in just one year.
Complete the boxes with the expressions from the conversation.
You must be kidding! Are you sure about ...
I don’t believe it! Check it out for yourself ...
It’s a fact! According to statistics ...
Don’t forget that …
Expressing doubt Responding to doubt
You must be kidding!
I don’t believe it!
Are you sure about ...
It’s a fact!
Don’t forget that…
Check it out for yourself... According to statistics...
9
Work in pairs. Talk about what would happen to the ecosystem if another species died out. Use the words and expressions in this section.
Now think about how your knowledge helped you contribute to the discussion.
10
Meg: Hey Ollie, have you heard that the bee population is declining
Ollie: No, I haven't. But, thinking about it, I hardly ever see bees these days. When I was
little, they seemed to be everywhere!
Meg: If bees die out, humans will die out too.
Ollie: What ! You must be kidding! I don't believe it!
Meg: It's a fact!! I watched a nature documentary all about it the other evening. Bees are
very important to our food supply.
Ollie: How can that be possible Humans won't die out just because there's no honey!
Meg: Bees don't just make honey. Don't forget that bees are also responsible for pollinating
plants. Without them, crop
Listening text
Ollie: But surely there are other ways of getting these crops to reproduce. Does
it have to be bees
Meg: Well, there are other insects that pollinate plants, but it's unlikely that
they would be able to fully compensate for the loss of bees.Bees are
responsible for pollinating about 70% of the species of crops.
Ollie: Are you sure about that data It sounds rather exaggerated.
Meg: Watch the documentary and check it out for yourself if you don't believe
me. Without bees, numerous plant species would die out. Animals that
live on the crops would die out, and we wouldn't have enough to eat.
Listening text
Ollie: Seriously That's scary! But looking on the bright side, there are millions and millions of bees. They're not going to die out any time soon.
Meg: I'm afraid you're wrong. The bee population is declining very quickly. According to statistics, bee numbers in the US have fallen by 17% in just one year.
Ollie: Gosh! What caused that
Meg: A combination of things, really, but it's mainly due to damage to their habitats caused by pesticides and climate change.
Ollie: So human activity is the main cause
Meg: That's right.
Ollie: Well, in that case, we'd better do something before it's too late.
Listening text
Write a article to talk about ecosystems.
Homework