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

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 30 to 34.

Ocean water plays an indispensable role in supporting life. The great ocean basins hold about 300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend annually upon the continents. This vast amount is required to replenish the lakes and streams, springs and water tables on which all flora and fauna are dependent. Thus, the hydrosphere permits organic existence.

The hydrosphere has strange characteristics because water has properties unlike those of any other liquid. One anomaly is that water upon freezing expands by about 9 percent, whereas most liquids contract on cooling. For this reason, ice floats on water bodies instead of sinking to the bottom. If the ice sank, the hydrosphere would soon be frozen solidly, except for a thin layer of surface melt water during the summer season. Thus, all aquatic life would be destroyed and the interchange of warm and cold currents, which moderates climate, would be notably absent.

Another outstanding characteristic of water is that water has a heat capacity which is the highest of all liquids and solids except ammonia. This characteristic enables the oceans to absorb and store vast quantities of heat, thereby often preventing climatic extremes. In addition, water dissolves more substances than any other liquid. It is this characteristic which helps make oceans a great storehouse for minerals which have been washed down from the continents. In several areas of the world these minerals are being commercially exploited. Solar evaporation of salt is widely practised, potash is extracted from the Dead Sea, and magnesium is produced from sea water along the American Gulf Coast.

The phrase “this vast amount” in the first paragraph refers to ________ .

A. 80,000 million cubic miles of water

B. 24,000 cubic miles of rain

C. 80,000 cubic miles of water

D. 300 million cubic miles of water

1

DH

Dương Hoàn Anh

28 tháng 9 2018

Đáp án B.
Thông tin: “More than 24,000 cubic miles of rain descend annually upon the continents. This vast amount is required to replenish the lakes and streams,...”
(Hơn 24.000 dặm khối nước mưa rơi xuống hàng năm sau trên các lục địa. Khối lượng khổng lồ này cần thiết để bổ sung nước cho các hồ và suối, ...)
=> Chủ ngữ “This vast amount” thay thế cho chủ ngữ câu trước “More than 24,000 cubic miles of rain

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 30 to 34. Ocean water plays an indispensable role in supporting life. The great ocean basins hold about 300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend...

LQ

Lê Quỳnh Anh

15 tháng 1 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 30 to 34.

Ocean water plays an indispensable role in supporting life. The great ocean basins hold about 300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend annually upon the continents. This vast amount is required to replenish the lakes and streams, springs and water tables on which all flora and fauna are dependent. Thus, the hydrosphere permits organic existence.

The hydrosphere has strange characteristics because water has properties unlike those of any other liquid. One anomaly is that water upon freezing expands by about 9 percent, whereas most liquids contract on cooling. For this reason, ice floats on water bodies instead of sinking to the bottom. If the ice sank, the hydrosphere would soon be frozen solidly, except for a thin layer of surface melt water during the summer season. Thus, all aquatic life would be destroyed and the interchange of warm and cold currents, which moderates climate, would be notably absent.

Another outstanding characteristic of water is that water has a heat capacity which is the highest of all liquids and solids except ammonia. This characteristic enables the oceans to absorb and store vast quantities of heat, thereby often preventing climatic extremes. In addition, water dissolves more substances than any other liquid. It is this characteristic which helps make oceans a great storehouse for minerals which have been washed down from the continents. In several areas of the world these minerals are being commercially exploited. Solar evaporation of salt is widely practised, potash is extracted from the Dead Sea, and magnesium is produced from sea water along the American Gulf Coast.

According to the passage, fish can survive in the oceans because ________ .

A. evaporation and condensation create a water cycle

B. there are currents in the oceans

C. they do not need oxygen

D. ice floats

1

DH

Dương Hoàn Anh

15 tháng 1 2019

Đáp án D.
Dịch câu hỏi: Theo đoạn văn, cá có thể sống trong các đại dương vì ________.
A. bay hơi và ngưng tụ tạo ra chu trình nước
B. có dòng chảy trong đại dương
C. họ không cần oxy
D. băng nổi
Thông tin: “For this reason, ice floats on water bodies instead of sinking to the bottom. If the ice sank, the hydrosphere would soon be frozen solidly,..” (Vì lý do này, băng nổi trên mặt nước thay vì chìm xuống đáy. Nếu băng chìm xuống, thủy quyển sẽ sớm bị đóng băng cứng,...)

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 30 to 34. Ocean water plays an indispensable role in supporting life. The great ocean basins hold about 300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend...

LQ

Lê Quỳnh Anh

28 tháng 11 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 30 to 34.

Ocean water plays an indispensable role in supporting life. The great ocean basins hold about 300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend annually upon the continents. This vast amount is required to replenish the lakes and streams, springs and water tables on which all flora and fauna are dependent. Thus, the hydrosphere permits organic existence.

The hydrosphere has strange characteristics because water has properties unlike those of any other liquid. One anomaly is that water upon freezing expands by about 9 percent, whereas most liquids contract on cooling. For this reason, ice floats on water bodies instead of sinking to the bottom. If the ice sank, the hydrosphere would soon be frozen solidly, except for a thin layer of surface melt water during the summer season. Thus, all aquatic life would be destroyed and the interchange of warm and cold currents, which moderates climate, would be notably absent.

Another outstanding characteristic of water is that water has a heat capacity which is the highest of all liquids and solids except ammonia. This characteristic enables the oceans to absorb and store vast quantities of heat, thereby often preventing climatic extremes. In addition, water dissolves more substances than any other liquid. It is this characteristic which helps make oceans a great storehouse for minerals which have been washed down from the continents. In several areas of the world these minerals are being commercially exploited. Solar evaporation of salt is widely practised, potash is extracted from the Dead Sea, and magnesium is produced from sea water along the American Gulf Coast.

The author’s main purpose in this passage is to ___________.

A. illustrate the importance of conserving water

B. describe the properties and uses of water

C. compare water with other liquids

D. explain how water is used in commerce and industry

1

DH

Dương Hoàn Anh

28 tháng 11 2018

Đáp án B.
Dịch câu hỏi: Mục đích chính của tác giả trong đoạn văn này là để ___________.
A. minh họa tầm quan trọng của việc bảo tồn nước
B. mô tả tính chất và công dụng của nước
C. so sánh nước với các chất lỏng khác
D. giải thích cách sử dụng nước trong thương mại và công nghiệp
Thông tin: “Ocean water plays an indispensable role in supporting life.” (Nước biển đóng vai trò không thể thiếu trong việc hỗ trợ cuộc sống.)
“The hydrosphere has strange characteristics because water has properties unlike those of any other liquid.” (Thủy quyển có những đặc điểm kỳ lạ vì nước có đặc tính không giống với bất kỳ chất lỏng nào khác.)
“Another outstanding characteristic of water is that water has a heat capacity,...” (Một đặc điểm nổi bật khác của nước là nước có nhiệt dung,...)

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 30 to 34. Ocean water plays an indispensable role in supporting life. The great ocean basins hold about 300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend...

LQ

Lê Quỳnh Anh

10 tháng 11 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 30 to 34.

Ocean water plays an indispensable role in supporting life. The great ocean basins hold about 300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend annually upon the continents. This vast amount is required to replenish the lakes and streams, springs and water tables on which all flora and fauna are dependent. Thus, the hydrosphere permits organic existence.

The hydrosphere has strange characteristics because water has properties unlike those of any other liquid. One anomaly is that water upon freezing expands by about 9 percent, whereas most liquids contract on cooling. For this reason, ice floats on water bodies instead of sinking to the bottom. If the ice sank, the hydrosphere would soon be frozen solidly, except for a thin layer of surface melt water during the summer season. Thus, all aquatic life would be destroyed and the interchange of warm and cold currents, which moderates climate, would be notably absent.

Another outstanding characteristic of water is that water has a heat capacity which is the highest of all liquids and solids except ammonia. This characteristic enables the oceans to absorb and store vast quantities of heat, thereby often preventing climatic extremes. In addition, water dissolves more substances than any other liquid. It is this characteristic which helps make oceans a great storehouse for minerals which have been washed down from the continents. In several areas of the world these minerals are being commercially exploited. Solar evaporation of salt is widely practised, potash is extracted from the Dead Sea, and magnesium is produced from sea water along the American Gulf Coast.

Which of the following is NOT mentioned as a characteristic of water?

A. Water can absorb heat

B. Water is good solvent

C. Water contracts on cooling

D. Water expands when it is frozen

1

DH

Dương Hoàn Anh

10 tháng 11 2018

Đáp án C.
Dịch câu hỏi: Điều nào sau đây KHÔNG được đề cập như một đặc tính của nước?
A. Nước có thể hấp thụ nhiệt
B. Nước là dung môi tốt.
C. Nước co lại khi mát
D. Nước mở rộng khi đóng băng
Thông tin:
A. “This characteristic enables the oceans to absorb and store vast quantities of heat...” (Đặc tính này cho phép các đại dương hấp thụ và lưu trữ một lượng nhiệt lớn,...)
B. “In addition, water dissolves more substances than any other liquid.” (Ngoài ra, nước hòa tan nhiều chất hơn bất kỳ chất lỏng nào khác.)
C, D. “One anomaly is that water upon freezing expands by about 9 percent, whereas most liquids contract on cooling.” (Một điều bất thường là nước khi đóng băng mở rộng khoảng 9%, trong khi hầu hết các chất lỏng đều co lại khi làm mát.) => Câu D đúng nhưng câu C sai. Nước không có lại mà là các chất lỏng khác

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 If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this...

LQ

Lê Quỳnh Anh

22 tháng 1 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

If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salt behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.

The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.

Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.

A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.

In the Weddell Sea, off Antarctica, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.

According to the passage, the ocean generally has more salt in

A. coastal areas

B. rainy areas

C. turbulent areas

D. tropical areas

1

DH

Dương Hoàn Anh

22 tháng 1 2017

Kiến thức: Đọc hiểu

Giải thích:

Theo đoạn văn, đại dương thường có nhiều muối trong

A. vùng ven biển B. vùng mưa C. vùng hỗn loạn D. vùng nhiệt đới

Thông tin: Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation.

Tạm dịch: Thông thường, ở các vùng nhiệt đới nơi mặt trời rất mạnh, độ mặn của đại dương có phần cao hơn so với các khu vực khác trên thế giới, nơi không có nhiều sự bốc hơi.

Chọn D

Dịch bài đọc:

Nếu độ mặn của nước biển được phân tích, nó được tìm ra rằng nó chỉ thay đổi một chút từ nơi này sang nơi khác. Tuy nhiên, một số thay đổi nhỏ này rất quan trọng. Có ba quá trình cơ bản gây ra sự thay đổi độ mặn của đại dương. Một trong số đó là phép trừ nước từ đại dương bằng phương pháp bay hơi - chuyển đổi nước lỏng thành hơi nước. Theo cách này, độ mặn được tăng lên, vì muối sót lại. Nếu điều này được thực hiện đến cùng cực, tất nhiên, các tinh thể muối trắng sẽ bị để lại.

Đối lập với sự bốc hơi là kết nước, chẳng hạn như mưa, qua đó nước được thêm vào đại dương. Ở đây đại dương đang bị pha loãng để độ mặn giảm. Điều này có thể xảy ra ở những khu vực có lượng mưa lớn hoặc ở những vùng ven biển nơi sông chảy vào đại dương. Do đó, độ mặn có thể được tăng lên bằng cách trừ nước bằng cách bay hơi, hoặc giảm khi bổ sung nước ngọt bằng lượng mưa hoặc dòng chảy.

Thông thường, ở các vùng nhiệt đới nơi mặt trời rất mạnh, độ mặn của đại dương có phần cao hơn so với các khu vực khác trên thế giới, nơi không có nhiều sự bốc hơi. Tương tự, ở các vùng ven biển nơi các con sông làm loãng biển, độ mặn có phần thấp hơn so với các khu vực đại dương khác.

Một quá trình thứ ba mà độ mặn có thể bị thay đổi có liên quan đến sự hình thành và tan chảy của băng biển. Khi nước biển bị đóng băng, các vật liệu hòa tan bị bỏ lại. Theo cách này, nước biển trực tiếp bên dưới băng biển mới hình thành có độ mặn cao hơn so với trước khi băng xuất hiện. Tất nhiên, khi băng này tan ra, nó sẽ có xu hướng làm giảm độ mặn của nước xung quanh.

Ở biển Weddell, ngoài khơi Nam Cực, nước dày đặc nhất trong đại dương được hình thành là kết quả của quá trình đóng băng này, làm tăng độ mặn của nước lạnh. Nước nặng này chìm xuống và được tìm thấy ở những nơi sâu hơn của các đại dương trên thế giới.

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 If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this...

LQ

Lê Quỳnh Anh

6 tháng 11 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

If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salt behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.

The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.

Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.

A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.

In the Weddell Sea, off Antarctica, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.

Which of the following is NOT a result of the formation of ocean ice?

A. The surrounding water sinks

B. Water salinity decreases

C.The salt remains in the water

D. The water becomes denser

1

DH

Dương Hoàn Anh

6 tháng 11 2018

Kiến thức: Đọc hiểu

Giải thích:

Điều nào sau đây KHÔNG phải là kết quả của sự hình thành băng đại dương?

A. Các bồn nước xung quanh B. Độ mặn của nước giảm

C. Muối vẫn còn trong nước D. Nước trở nên đặc hơn

Thông tin: When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared.

Tạm dịch: Khi nước biển bị đóng băng, các vật liệu hòa tan bị bỏ lại. Theo cách này, nước biển trực tiếp bên dưới băng biển mới hình thành có độ mặn cao hơn so với trước khi băng xuất hiện.

Chọn B

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 43 to 50.If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water...

LQ

Lê Quỳnh Anh

20 tháng 10 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 43 to 50.

If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salts stay behind. If this is carried to the extreme, of course, white crystals of salt would be left behind: this, by the way, is how much of the table salt we use is actually obtained.

The opposite of evaporation is precipitation. such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.

Normally in tropical regions where the Sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea salinity is somewhat lower than in other oceanic areas.

A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.

In the Weddell Sea, off Antarctica, the densest water in the oceans is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world

Which of the following statements about the salinity of a body of water can best be inferred from the passage?

A. The temperature of the water is the most important factor.

B. How quickly the water moves is directly related to the amount of alt.

C. Ocean salinity has little effect on sea life.

D. Various factors combine to cause variations in the salt content of water.

1

DH

Dương Hoàn Anh

20 tháng 10 2019

Đáp án D

Dựa vào các thông tin được đề cập trong đoạn văn → có thể suy ra rằng có nhiều nhân tố kết hợp lại để gây ra sự thay đổi lượng muối trong nước biển.

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 If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this...

LQ

Lê Quỳnh Anh

5 tháng 10 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

If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salt behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.

The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.

Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.

A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.

In the Weddell Sea, off Antarctica, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.

What does the passage mainly discuss?

A. The salinity of ocean water

B. The many forms of ocean life

C. The elements of salt

D. The bodies of water of the world

1

DH

Dương Hoàn Anh

5 tháng 10 2017

Kiến thức: Đọc hiểu

Giải thích:

Đoạn văn chủ yếu thảo luận gì?

A. Độ mặn của nước biển B. Nhiều dạng sống của đại dương

C. Các nguyên tố của muối D. Các cơ quan nước trên thế giới

Bài văn thảo luận về độ mặn của nước biển và những nhân tố ảnh hưởng đến độ mặn của nước biển

Chọn A

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 If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this...

LQ

Lê Quỳnh Anh

31 tháng 3 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

If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salt behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.

The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.

Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.

A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.

In the Weddell Sea, off Antarctica, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.

The word “it” in paragraph 4 refers to .

A. sea ice

B. manner

C. seawater

D. salinity

1

DH

Dương Hoàn Anh

31 tháng 3 2017

Kiến thức: Đọc hiểu

Giải thích:

Từ “it” trong đoạn 4 đề cập đến

A. Băng biển B. Cách thức C. Nước biển D. Độ mặn

“it” đề cập đến “seawater”: In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared.

Chọn C