what organizations/groups can we help to protect blue whales

TH

Trần Hữu Công

13 tháng 2 2022

#Hóa học lớp 6

1

NH

Ngô Hiếu Thuận

17 tháng 7 2022

World Wildlife Fund or Greenpeace, which are both working to help save whales.

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TN

Trương Ngọc Linh

26 tháng 7 2023

9.Write about blue whales.Use the topic sentences ( a to c ) and notes. a) Blue whales are the biggest animals in the world. b) They live in small groups. - more than 30 metres long - bigger than dinosaurs - usually two or three whales in a group c) They are not dangerous to human. - can use sound to talk - only eat small creatures - intelligent and...

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#Tiếng anh lớp 6

8

TD

Trần Đình Thiên

26 tháng 7 2023

Blue whales are the biggest animals in the world. They are more than 30 meters long, making them even bigger than dinosaurs. Despite their massive size, blue whales live in small groups. Usually, there are only two or three whales in a group.

Contrary to their enormous size, blue whales are not dangerous to humans. They are gentle creatures and are known for their intelligence. Blue whales can use sound to communicate with each other, making them excellent at talking. Additionally, they have a unique feeding habit. Despite their size, blue whales only eat small creatures, such as krill and plankton.

In conclusion, blue whales are fascinating creatures. They are the largest animals on Earth, yet they live in small groups. Despite their size, they are gentle and intelligent. Blue whales use sound to communicate and only eat small creatures. Their presence in the ocean is a testament to the diversity and wonder of marine life.

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TD

Trần Đình Thiên

26 tháng 7 2023

Blue whales are the biggest animals in the world. They are more than 30 meters long, making them even bigger than dinosaurs. Despite their massive size, blue whales live in small groups. Usually, there are only two or three whales in a group.

Contrary to their enormous size, blue whales are not dangerous to humans. They are gentle creatures and are known for their intelligence. Blue whales can use sound to communicate with each other, making them excellent at talking. Additionally, they have a unique feeding habit. Despite their size, blue whales only eat small creatures, such as krill and plankton.

In conclusion, blue whales are fascinating creatures. They are the largest animals on Earth, yet they live in small groups. Despite their size, they are gentle and intelligent. Blue whales use sound to communicate and only eat small creatures. Their presence in the ocean is a testament to the diversity and wonder of marine life.

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D

datcoder

CTVVIP

10 tháng 9 2023

Work in groups. Discuss the following questions.

Why do we need national parks? What should we do to protect them?

#Tiếng anh lớp 11

1

GL

Gia Linh

10 tháng 9 2023

Tham khảo:

National Parks protect wildlife, habitats, and nature from destruction and human impact. They give animals a safe space to breed and survive. Over 247 species of threatened or endangered plants and animals are protected in National Parks. National parks protect places of natural beauty. National park is home to many endemic species. They also protect places important to Aboriginal people, and places that show how people lived in the past. National parks are actually protected areas. They protect many amazing animals and landscapes, such as the world's largest living things, Giant Sequoia trees, the longest cave system known to the world, Mammoth Cave National Park, and Crater Lake, America’s deepest lake etc.

To protect national parks, some actions that can be taken include:

Raising awareness: People need to understand the importance of national parks and the impact that their actions can have on them.

Limiting human impact: National parks should be managed in a way that minimizes the impact of human activities such as logging, mining, and construction.

Enforcing regulations: Rules and regulations should be in place to protect the parks, and these rules should be enforced to prevent illegal activities.

Supporting park staff: Adequate resources should be provided to national parks and their staff to ensure that they can effectively manage and protect the parks.

Educating visitors: Visitors should be educated about how to behave responsibly in national parks, such as avoiding littering, staying on marked trails, and not disturbing wildlife.

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TA

Trâm anh Nguyễn 8a1

5 tháng 3 2022

1.Mi and Nick like coming............Mi's home village on holidayA.back B.on C.from D.with2.what can we do to protect people...........natural disasters?A.on B.from C.out D.in3.We would help the Earth...........we recycle more.A.So B.Thanks to C.because of D.If4.His son.................an online lesson at present.A.attends B.attended C. is attending D.has attended5.The sight of too many advertising billboards,overhead poles and...

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#Tiếng anh lớp 8

2

D

Dark_Hole

5 tháng 3 2022

1A

2B

3D

4C

5D

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N

Neko_pị_thiểu_năng

5 tháng 3 2022

1.A
2.B
3.D
4.C
5.D

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LQ

Lê Quỳnh Anh

27 tháng 8 2018

Read the passage carefully then answer the questions.The environment is the most important thing for our life. The environment is the air we breathe, the water we drink and is everything we need for our life. This pollution affects the health of living things.But only we can change it and solve it. First, we can use recycled paper to help save trees. Second try to avoid buying plastic. To protect the environment we also have to save energy.Finally, we now know that environment is the most...

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#Tiếng anh thí điểm lớp 7

1

DH

Dương Hoàn Anh

27 tháng 8 2018

Đáp án: We can use recycled paper to help save trees.

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LQ

Lê Quỳnh Anh

2 tháng 4 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Whales are the largest animals in the world, and the gentlest creatures we know. Although the whale is very huge, it is not hindered at all by its size when it is in the water. Whales have tails that end like flippers. With just a gentle flick, it can propel itself forward. The skin of a whale is so smooth that it does not create any friction that can slow...

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#Tiếng anh thí điểm lớp 11

1

DH

Dương Hoàn Anh

2 tháng 4 2019

Đáp án B

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DM

Dương Minh

12 tháng 5 2018

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.Blue...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.

The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.

Blue whales are simply enormous with most ranging in length from 24-30 m. The largest ever recorded was a gargantuan 33.5 m long. Females are up to 10 m longer than males. And they can weigh up to 200 tonnes. Just to put that in perspective: an adult male African elephant weighs 6 tonnes. The blue whale's heart is the size of a small car and its beat can be detected two miles away. But that's nothing compared to their calls. Blue whales are the loudest animals on earth and their calls are louder than a jet engine: reaching 188 decibels, while a jet's engine hit 'just' 140 decibels. Apart from their gigantic size, blue whales can be identified by their relatively small dorsal fin, a fairly rounded rostrum (anterior part of the skull), and approximately 90 ventral grooves, which reach the navel. They also have row of 300-400 baleen plates on each side of the mouth, which are black in color and range in length from 50 cm in front to 100 cm in back.

Blue whales mostly travel alone or in groups of 2-3. Larger groups of up to 60 whales have been reported and are probably associated with feeding grounds. However, the blue whale has the most powerful voice in the animal kingdom and its low-frequency sounds can travel in deep water over hundreds, or even thousands, of miles. Under these circumstances, animals which may appear to us to be traveling alone may actually be in constant contact with one another.

At birth, a blue whale calf is the largest baby on earth: approximately 8m long and weighing about 4 tonnes. They grow at a rate of 90 kg per day and wean after 7-8 months, once they have reached about 15 m in length, and are able to follow the normal migration pattern alone. They reach sexual maturity at 5-10 years. This growth rate is astonishing and is probably the fastest in the animal kingdom. From conception to weaning, it represents a several billion-fold increase in tissue in just over a year and a half. Like other baleen whales, the blue whale has no teeth so it is hard to tell its age but scientists believe they live until at least 50.

Like other large whales, blue whales are threatened by chemical and sound pollution, habitat loss, overfishing of krill, ship strikes and becoming entangled in fishing gear. Climate change could also have a major impact on its food supply, since global warming and associated ocean acidification may impact krill populations. In addition, frontal zones - critical whale habitats - are projected to move further south due to climate change. Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales. Blue whales would have to migrate further (perhaps 200-500 km more) to reach and feed at these food-rich areas where they build up reserves to sustain themselves for the rest of the year. These longer migration paths could increase the energy costs of migration and reduce the duration of the main feeding season. As frontal zones move southward, they also move closer together, reducing the overall area of foraging habitat available.

What does the word "it" in the last paragraph refer to?

A. the depth

B. water

C. water mass

D. climate change

#Mẫu giáo

1

NH

Nguyen Hoang Hai

12 tháng 5 2018

Đáp án B

Tử “ít” trong đoạn cuối đề cập đến danh từ nào?

A. độ sau B. nước C. khối nước D. sự biến đổi khí hậu

Căn cứ vào thông tin đoạn cuối:

Từ "it” thay thế cho danh từ water.

Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales. (Các khu vực phía trước là ranh giới giữa các khối nước khác nhau, nơi nước có thể dâng lên từ dưới đáy, mang theo nó một lượng lớn các chất dinh dưỡng kích thích sự phát triển của thực vật phù du và hỗ trợ đáng kể các quần thể loài thức ăn của cá voi xanh.)

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LQ

Lê Quỳnh Anh

18 tháng 4 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35. The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change. Blue...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.

The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.

Blue whales are simply enormous with most ranging in length from 24-30 m. The largest ever recorded was a gargantuan 33.5 m long. Females are up to 10 m longer than males. And they can weigh up to 200 tonnes. Just to put that in perspective: an adult male African elephant weighs 6 tonnes. The blue whale's heart is the size of a small car and its beat can be detected two miles away. But that's nothing compared to their calls. Blue whales are the loudest animals on earth and their calls are louder than a jet engine: reaching 188 decibels, while a jet's engine hit 'just' 140 decibels. Apart from their gigantic size, blue whales can be identified by their relatively small dorsal fin, a fairly rounded rostrum (anterior part of the skull), and approximately 90 ventral grooves, which reach the navel. They also have row of 300-400 baleen plates on each side of the mouth, which are black in color and range in length from 50 cm in front to 100 cm in back.

Blue whales mostly travel alone or in groups of 2-3. Larger groups of up to 60 whales have been reported and are probably associated with feeding grounds. However, the blue whale has the most powerful voice in the animal kingdom and its low-frequency sounds can travel in deep water over hundreds, or even thousands, of miles. Under these circumstances, animals which may appear to us to be traveling alone may actually be in constant contact with one another.

At birth, a blue whale calf is the largest baby on earth: approximately 8m long and weighing about 4 tonnes. They grow at a rate of 90 kg per day and wean after 7-8 months, once they have reached about 15 m in length, and are able to follow the normal migration pattern alone. They reach sexual maturity at 5-10 years. This growth rate is astonishing and is probably the fastest in the animal kingdom. From conception to weaning, it represents a several billion-fold increase in tissue in just over a year and a half. Like other baleen whales, the blue whale has no teeth so it is hard to tell its age but scientists believe they live until at least 50.

Like other large whales, blue whales are threatened by chemical and sound pollution, habitat loss, overfishing of krill, ship strikes and becoming entangled in fishing gear. Climate change could also have a major impact on its food supply, since global warming and associated ocean acidification may impact krill populations. In addition, frontal zones - critical whale habitats - are projected to move further south due to climate change. Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales. Blue whales would have to migrate further (perhaps 200-500 km more) to reach and feed at these food-rich areas where they build up reserves to sustain themselves for the rest of the year. These longer migration paths could increase the energy costs of migration and reduce the duration of the main feeding season. As frontal zones move southward, they also move closer together, reducing the overall area of foraging habitat available.

Question 33: What does the word "it" in the last paragraph refer to?

A. the depth

B. water

C. water mass

D. climate change

#Mẫu giáo

1

DH

Dương Hoàn Anh

18 tháng 4 2017

Đáp án B

Tử “ít” trong đoạn cuối đề cập đến danh từ nào?

A. độ sau B. nước C. khối nước D. sự biến đổi khí hậu

Căn cứ vào thông tin đoạn cuối:

Từ "it” thay thế cho danh từ water.

Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales. (Các khu vực phía trước là ranh giới giữa các khối nước khác nhau, nơi nước có thể dâng lên từ dưới đáy, mang theo nó một lượng lớn các chất dinh dưỡng kích thích sự phát triển của thực vật phù du và hỗ trợ đáng kể các quần thể loài thức ăn của cá voi xanh.)

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DM

Dương Minh

3 tháng 3 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.Blue...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.

The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.

Blue whales are simply enormous with most ranging in length from 24-30 m. The largest ever recorded was a gargantuan 33.5 m long. Females are up to 10 m longer than males. And they can weigh up to 200 tonnes. Just to put that in perspective: an adult male African elephant weighs 6 tonnes. The blue whale's heart is the size of a small car and its beat can be detected two miles away. But that's nothing compared to their calls. Blue whales are the loudest animals on earth and their calls are louder than a jet engine: reaching 188 decibels, while a jet's engine hit 'just' 140 decibels. Apart from their gigantic size, blue whales can be identified by their relatively small dorsal fin, a fairly rounded rostrum (anterior part of the skull), and approximately 90 ventral grooves, which reach the navel. They also have row of 300-400 baleen plates on each side of the mouth, which are black in color and range in length from 50 cm in front to 100 cm in back.

Blue whales mostly travel alone or in groups of 2-3. Larger groups of up to 60 whales have been reported and are probably associated with feeding grounds. However, the blue whale has the most powerful voice in the animal kingdom and its low-frequency sounds can travel in deep water over hundreds, or even thousands, of miles. Under these circumstances, animals which may appear to us to be traveling alone may actually be in constant contact with one another.

At birth, a blue whale calf is the largest baby on earth: approximately 8m long and weighing about 4 tonnes. They grow at a rate of 90 kg per day and wean after 7-8 months, once they have reached about 15 m in length, and are able to follow the normal migration pattern alone. They reach sexual maturity at 5-10 years. This growth rate is astonishing and is probably the fastest in the animal kingdom. From conception to weaning, it represents a several billion-fold increase in tissue in just over a year and a half. Like other baleen whales, the blue whale has no teeth so it is hard to tell its age but scientists believe they live until at least 50.

Like other large whales, blue whales are threatened by chemical and sound pollution, habitat loss, overfishing of krill, ship strikes and becoming entangled in fishing gear. Climate change could also have a major impact on its food supply, since global warming and associated ocean acidification may impact krill populations. In addition, frontal zones - critical whale habitats - are projected to move further south due to climate change. Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales. Blue whales would have to migrate further (perhaps 200-500 km more) to reach and feed at these food-rich areas where they build up reserves to sustain themselves for the rest of the year. These longer migration paths could increase the energy costs of migration and reduce the duration of the main feeding season. As frontal zones move southward, they also move closer together, reducing the overall area of foraging habitat available.

What does the word "wean" in paragraph 4 mean?

A. stop feeding a calf with its mother's milk

B. stop growing as fast as before

C. begin living independently

D. begin trying to find food

#Mẫu giáo

1

NH

Nguyen Hoang Hai

3 tháng 3 2019

Đáp án A

Tử “wean" trong đoạn 4 có nghĩa là gì?

A. ngừng cho cá voi con bú sữa mẹ B. ngừng tăng trưởng nhanh như trước

C. bắt đầu sống độc lập D. bắt đầu tự tìm thức ăn

Nghĩa của từ: wean = cai sữa mẹ

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DM

Dương Minh

7 tháng 12 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.Blue...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.

The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.

Blue whales are simply enormous with most ranging in length from 24-30 m. The largest ever recorded was a gargantuan 33.5 m long. Females are up to 10 m longer than males. And they can weigh up to 200 tonnes. Just to put that in perspective: an adult male African elephant weighs 6 tonnes. The blue whale's heart is the size of a small car and its beat can be detected two miles away. But that's nothing compared to their calls. Blue whales are the loudest animals on earth and their calls are louder than a jet engine: reaching 188 decibels, while a jet's engine hit 'just' 140 decibels. Apart from their gigantic size, blue whales can be identified by their relatively small dorsal fin, a fairly rounded rostrum (anterior part of the skull), and approximately 90 ventral grooves, which reach the navel. They also have row of 300-400 baleen plates on each side of the mouth, which are black in color and range in length from 50 cm in front to 100 cm in back.

Blue whales mostly travel alone or in groups of 2-3. Larger groups of up to 60 whales have been reported and are probably associated with feeding grounds. However, the blue whale has the most powerful voice in the animal kingdom and its low-frequency sounds can travel in deep water over hundreds, or even thousands, of miles. Under these circumstances, animals which may appear to us to be traveling alone may actually be in constant contact with one another.

At birth, a blue whale calf is the largest baby on earth: approximately 8m long and weighing about 4 tonnes. They grow at a rate of 90 kg per day and wean after 7-8 months, once they have reached about 15 m in length, and are able to follow the normal migration pattern alone. They reach sexual maturity at 5-10 years. This growth rate is astonishing and is probably the fastest in the animal kingdom. From conception to weaning, it represents a several billion-fold increase in tissue in just over a year and a half. Like other baleen whales, the blue whale has no teeth so it is hard to tell its age but scientists believe they live until at least 50.

Like other large whales, blue whales are threatened by chemical and sound pollution, habitat loss, overfishing of krill, ship strikes and becoming entangled in fishing gear. Climate change could also have a major impact on its food supply, since global warming and associated ocean acidification may impact krill populations. In addition, frontal zones - critical whale habitats - are projected to move further south due to climate change. Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales. Blue whales would have to migrate further (perhaps 200-500 km more) to reach and feed at these food-rich areas where they build up reserves to sustain themselves for the rest of the year. These longer migration paths could increase the energy costs of migration and reduce the duration of the main feeding season. As frontal zones move southward, they also move closer together, reducing the overall area of foraging habitat available.
What is the purpose of the author in the passage?

A. To provide basic information about the blue whale and its major threats.

B. To prove that the blue whale is the biggest mammal on the Earth.

C. To give evidence of how the blue whale changes the habit and feeding grounds.

D. To raise people's awareness of the extinction of the blue whale

#Mẫu giáo

1

NH

Nguyen Hoang Hai

7 tháng 12 2017

Đáp án A

CHỦ ĐỀ ENDANGERED SPECIES

Mục đích của tác giả trong đoạn văn là gì?

A. Nhằm cung cấp những thông tin cơ bản về cá voi xanh và những mối đe doạ chính của chúng.

B. Để chứng minh rằng cá voi xanh là loài động vật có vú lớn nhất trên Trái Đất.

C. Để cung cấp bằng chứng về việc cá voi xanh thay đổi thói quen và khu vực kiếm ăn như thế nào.

D. Nhằm nâng cao nhận thức của mọi người về sự tuyệt chủng của cá voi xanh.

Căn cứ vào thông tin đoạn 1:

The blue whale is the largest animal ever known to have existed. During the 20^th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change. (Cá voi xanh là loài động vật lớn nhất từng được biết đến. Trong thế kỉ 20, loài này đã gần như bị tuyệt chủng do nạn săn bắt cá voi phục vụ thương mại. Loài này đã dần hồi phục sau lệnh cấm đánh bắt cá voi toàn cầu nhưng nó vẫn đang gặp nguy hiểm và đối mặt với một số mối đe doạ nghiêm trọng bao gồm các cuộc tấn công tàu và tác động của biến đổi khí hậu.)

Bên cạnh do, các đoạn còn lại cung cấp thêm các thông tin cơ bản về loài cá voi như đặc điểm bên ngoài (đoạn 2), tập quán sinh sống (đoạn 3), sinh con (đoạn 4) và các mối đe doạ đến cá voi (đoạn cuối)

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LQ

Lê Quỳnh Anh

18 tháng 3 2018

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35. The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change. Blue...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 35.

The blue whale is the largest animal ever known to have existed. During the 20th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change.

Blue whales are simply enormous with most ranging in length from 24-30 m. The largest ever recorded was a gargantuan 33.5 m long. Females are up to 10 m longer than males. And they can weigh up to 200 tonnes. Just to put that in perspective: an adult male African elephant weighs 6 tonnes. The blue whale's heart is the size of a small car and its beat can be detected two miles away. But that's nothing compared to their calls. Blue whales are the loudest animals on earth and their calls are louder than a jet engine: reaching 188 decibels, while a jet's engine hit 'just' 140 decibels. Apart from their gigantic size, blue whales can be identified by their relatively small dorsal fin, a fairly rounded rostrum (anterior part of the skull), and approximately 90 ventral grooves, which reach the navel. They also have row of 300-400 baleen plates on each side of the mouth, which are black in color and range in length from 50 cm in front to 100 cm in back.

Blue whales mostly travel alone or in groups of 2-3. Larger groups of up to 60 whales have been reported and are probably associated with feeding grounds. However, the blue whale has the most powerful voice in the animal kingdom and its low-frequency sounds can travel in deep water over hundreds, or even thousands, of miles. Under these circumstances, animals which may appear to us to be traveling alone may actually be in constant contact with one another.

At birth, a blue whale calf is the largest baby on earth: approximately 8m long and weighing about 4 tonnes. They grow at a rate of 90 kg per day and wean after 7-8 months, once they have reached about 15 m in length, and are able to follow the normal migration pattern alone. They reach sexual maturity at 5-10 years. This growth rate is astonishing and is probably the fastest in the animal kingdom. From conception to weaning, it represents a several billion-fold increase in tissue in just over a year and a half. Like other baleen whales, the blue whale has no teeth so it is hard to tell its age but scientists believe they live until at least 50.

Like other large whales, blue whales are threatened by chemical and sound pollution, habitat loss, overfishing of krill, ship strikes and becoming entangled in fishing gear. Climate change could also have a major impact on its food supply, since global warming and associated ocean acidification may impact krill populations. In addition, frontal zones - critical whale habitats - are projected to move further south due to climate change. Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales. Blue whales would have to migrate further (perhaps 200-500 km more) to reach and feed at these food-rich areas where they build up reserves to sustain themselves for the rest of the year. These longer migration paths could increase the energy costs of migration and reduce the duration of the main feeding season. As frontal zones move southward, they also move closer together, reducing the overall area of foraging habitat available.

Question 28: What is the purpose of the author in the passage?

A. To provide basic information about the blue whale and its major threats.

B. To prove that the blue whale is the biggest mammal on the Earth.

C. To give evidence of how the blue whale changes the habit and feeding grounds.

D. To raise people's awareness of the extinction of the blue whale.

#Mẫu giáo

1

DH

Dương Hoàn Anh

18 tháng 3 2018

Đáp án A

CHỦ ĐỀ ENDANGERED SPECIES

Mục đích của tác giả trong đoạn văn là gì?

A. Nhằm cung cấp những thông tin cơ bản về cá voi xanh và những mối đe doạ chính của chúng.

B. Để chứng minh rằng cá voi xanh là loài động vật có vú lớn nhất trên Trái Đất.

C. Để cung cấp bằng chứng về việc cá voi xanh thay đổi thói quen và khu vực kiếm ăn như thế nào.

D. Nhằm nâng cao nhận thức của mọi người về sự tuyệt chủng của cá voi xanh.

Căn cứ vào thông tin đoạn 1:

The blue whale is the largest animal ever known to have existed. During the 20^th century, the species was almost exterminated due to commercial whaling. The species has slowly recovered following the global whaling ban but it remains endangered and faces a number of serious threats including ship strikes and the impact of climate change. (Cá voi xanh là loài động vật lớn nhất từng được biết đến. Trong thế kỉ 20, loài này đã gần như bị tuyệt chủng do nạn săn bắt cá voi phục vụ thương mại. Loài này đã dần hồi phục sau lệnh cấm đánh bắt cá voi toàn cầu nhưng nó vẫn đang gặp nguy hiểm và đối mặt với một số mối đe doạ nghiêm trọng bao gồm các cuộc tấn công tàu và tác động của biến đổi khí hậu.)

Bên cạnh do, các đoạn còn lại cung cấp thêm các thông tin cơ bản về loài cá voi như đặc điểm bên ngoài (đoạn 2), tập quán sinh sống (đoạn 3), sinh con (đoạn 4) và các mối đe doạ đến cá voi (đoạn cuối)

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