Commercial airliners do not fly in the vicinity of volcanic eruptions because even a small amount of volcanic ash can da...

LQ

Lê Quỳnh Anh

5 tháng 9 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 43 to 50. Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes...

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 43 to 50.

Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes place when and where it does is called the theory of “plate tectonics”. The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock. While their movement may appear insignificant, at only several inches per year, it is not. Indeed, the collisions between plates caused by this almost imperceptible movement can have catastrophic consequences. Volcanic activity and earthquakes are concentrated near the boundaries of these giant, moving plates.

The majority of volcanoes are formed at te point where two plates collide. One of the plates is forced underneath the other. As the plate sinks, the earth’s heat and the friction of the movement cause a portion of the sinking plate to melt. This melted portion of plate is called magma, and when it reaches the earth’s surface it becomes a volcano. Volcanoes can also be created when two plates begin to diverge. Then, magma from below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out from the void. Volcanoes of this type usually are found not on land, but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid-Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean. The theory of plate tectonics also explains why some volcanic activity takes place so far from any known plate boundaries. Basically, these volcanoes are the result of huge column of magma, or plumes, that rise up and break through the surface of the earth.

The Ring of Fire is_________.

A. The Mid - Atlantic Ocean

B. The place where the highest concentration of volcanoes is found.

C. An island in the Pacific Ocean

D. Hawaii

#Mẫu giáo

1

DH

Dương Hoàn Anh

5 tháng 9 2018

Câu đề bài: Vành đai lửa Thái Bình Dương là ______.

Đáp án B. Nơi tập trung nhiều núi lửa nhất

Các đáp án còn lại:

A. Miền trung - Đại Tây Dương

C. Một hòn đảo của Thái Bình Dương

D. Hawaii

Thông tin trong bài:

Most volcanoes are found along an imaginary belt, called the Ring of Fỉre, that encircles the Paciftc Ocean.

—» Hầu hết các núi lửa được tìm thấy dọc theo một vành đai tưởng tượng, được gọi là Vành đai lửa, bao quanh Thái Bình Dương.

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LQ

Lê Quỳnh Anh

29 tháng 11 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. Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes...

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 43 to 50.

Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes place when and where it does is called the theory of “plate tectonics”. The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock. While their movement may appear insignificant, at only several inches per year, it is not. Indeed, the collisions between plates caused by this almost imperceptible movement can have catastrophic consequences. Volcanic activity and earthquakes are concentrated near the boundaries of these giant, moving plates.

The majority of volcanoes are formed at te point where two plates collide. One of the plates is forced underneath the other. As the plate sinks, the earth’s heat and the friction of the movement cause a portion of the sinking plate to melt. This melted portion of plate is called magma, and when it reaches the earth’s surface it becomes a volcano. Volcanoes can also be created when two plates begin to diverge. Then, magma from below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out from the void. Volcanoes of this type usually are found not on land, but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid-Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean. The theory of plate tectonics also explains why some volcanic activity takes place so far from any known plate boundaries. Basically, these volcanoes are the result of huge column of magma, or plumes, that rise up and break through the surface of the earth.

A. Thrown out

B. Unimportant

C. Distant

D. Inaccessible

#Mẫu giáo

1

DH

Dương Hoàn Anh

29 tháng 11 2019

Câu đề bài: Cụm từ "far-flung " trong dòng 3 gần nhất nghĩa với __________.

Far-flung = distant or remote: bao la, mênh mông.

C. xa cách

Các đáp án còn lại:

A. ném đi B. Không quan trọng

D. Không thể tiếp cận

Thông tin trong bài:

However, volcanic activity takes place in many far-ftung regions of the world such as Hawai, Iceland, Europe, and even the floor of the earth’s oceans.

—» Tuy nhiên, hoạt động núi lửa diễn ra ở nhiều khu vực xa xôi của thế giới như Hawaii, Iceland, châu Âu hay ngay cả thềm các dại dương.

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LQ

Lê Quỳnh Anh

13 tháng 5 2018

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the following questions from (71) to (80) The Moon has been worshipped by primitive peoples and has inspired humans to create everything from lunar calendars to love sonnets, but what do we really know about it? The most accepted theory about the origin of the Moon is that it was formed of the debris from a massive collision with the young Earth about 4.6 billion years ago. A huge body,...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the following questions from (71) to (80)

The Moon has been worshipped by primitive peoples and has inspired humans to create everything from lunar calendars to love sonnets, but what do we really know about it? The most accepted theory about the origin of the Moon is that it was formed of the debris from a massive collision with the young Earth about 4.6 billion years ago. A huge body, perhaps the size of Mars, struck the Earth, throwing out an immense amount of debris that coalesced and cooled in orbit around the Earth.

The development of Earth is inextricably linked to the moon; the Moon's gravitational influence upon the Earth is the primary cause of ocean tides. In fact, the Moon has more than twice the effect upon the tides than does the Sun. The Moon makes one rotation and completes a revolution around the Earth every 27 days, 7 hours, and 43 minutes. This synchronous rotation is caused by an uneven distribution of mass in the Moon (essentially, it is heavier on one side than the other) and has allowed the Earth's gravity to keep one side of the Moon permanently facing Earth. It is an average distance from Earth of 384,403 km.

The Moon has no atmosphere; without an atmosphere, the Moon has nothing to protect it from meteorite impacts, and thus the surface of the Moon is covered with impact craters, both large and small. The Moon also has no active tectonic or volcanic activity, so the erosive effects of atmospheric weathering, tectonic shifts, and volcanic upheavals that tend to erase and reform the Earth's surface features are not at work on the Moon. In fact, even tiny surface features such as the footprint left by an astronaut in the lunar soil are likely to last for millions of years, unless obliterated by a chance meteorite strike. The surface gravity of the Moon is about one-sixth that of the Earth's. Therefore, a man weighing 82 kilograms on Earth would only weigh 14 kilograms on the Moon.

The geographical features of the Earth most like that of the Moon are, in fact, places such as the Hawaiian volcanic craters and the huge meteor crater in Arizona. The climate of the Moon is very unlike either Hawaii or Arizona, however; in fact the temperature on the Moon ranges between 123 degrees C. to - 233 degrees C.

A person on the Moon would weigh less than on the Earth because

A. of the composition of lunar soil

B. the Moon has no atmosphere

C. the Moon has no active tectonic or volcanic activity

D. the surface gravity of the Moon is less

#Mẫu giáo

1

DH

Dương Hoàn Anh

13 tháng 5 2018

Đáp án là D. Ý trong bài: The surface gravity of the Moon is about one-sixth that of the Earth's. Therefore, a man weighing 82 kilograms on Earth would only weigh 14 kilograms on the Moon.

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LQ

Lê Quỳnh Anh

11 tháng 8 2019

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the following questions from (71) to (80) The Moon has been worshipped by primitive peoples and has inspired humans to create everything from lunar calendars to love sonnets, but what do we really know about it? The most accepted theory about the origin of the Moon is that it was formed of the debris from a massive collision with the young Earth about 4.6 billion years ago. A huge body,...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the following questions from (71) to (80)

The Moon has been worshipped by primitive peoples and has inspired humans to create everything from lunar calendars to love sonnets, but what do we really know about it? The most accepted theory about the origin of the Moon is that it was formed of the debris from a massive collision with the young Earth about 4.6 billion years ago. A huge body, perhaps the size of Mars, struck the Earth, throwing out an immense amount of debris that coalesced and cooled in orbit around the Earth.

The development of Earth is inextricably linked to the moon; the Moon's gravitational influence upon the Earth is the primary cause of ocean tides. In fact, the Moon has more than twice the effect upon the tides than does the Sun. The Moon makes one rotation and completes a revolution around the Earth every 27 days, 7 hours, and 43 minutes. This synchronous rotation is caused by an uneven distribution of mass in the Moon (essentially, it is heavier on one side than the other) and has allowed the Earth's gravity to keep one side of the Moon permanently facing Earth. It is an average distance from Earth of 384,403 km.

The Moon has no atmosphere; without an atmosphere, the Moon has nothing to protect it from meteorite impacts, and thus the surface of the Moon is covered with impact craters, both large and small. The Moon also has no active tectonic or volcanic activity, so the erosive effects of atmospheric weathering, tectonic shifts, and volcanic upheavals that tend to erase and reform the Earth's surface features are not at work on the Moon. In fact, even tiny surface features such as the footprint left by an astronaut in the lunar soil are likely to last for millions of years, unless obliterated by a chance meteorite strike. The surface gravity of the Moon is about one-sixth that of the Earth's. Therefore, a man weighing 82 kilograms on Earth would only weigh 14 kilograms on the Moon.

The geographical features of the Earth most like that of the Moon are, in fact, places such as the Hawaiian volcanic craters and the huge meteor crater in Arizona. The climate of the Moon is very unlike either Hawaii or Arizona, however; in fact the temperature on the Moon ranges between 123 degrees C. to - 233 degrees C.

Which of the following can be inferred from the passage?

A. if the Moon had no gravitational influence, the Earth would not have tides

B. if the Moon had no gravitational influence, the Earth would not have tide

C. Mars could have been formed in a similar way to the Moon

D. the Moon is not able to support human life

#Mẫu giáo

1

DH

Dương Hoàn Anh

11 tháng 8 2019

Đáp án là D. Con người không thể sống trên mặt Trăng được, vì lý do có thể dễ nhận thấy là nhiệt độ, “in fact the temperature on the Moon ranges between 123 degrees C. to -233 degrees C.

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LQ

Lê Quỳnh Anh

5 tháng 6 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 43 to 50. Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes...

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 43 to 50.

Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes place when and where it does is called the theory of “plate tectonics”. The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock. While their movement may appear insignificant, at only several inches per year, it is not. Indeed, the collisions between plates caused by this almost imperceptible movement can have catastrophic consequences. Volcanic activity and earthquakes are concentrated near the boundaries of these giant, moving plates.

The majority of volcanoes are formed at te point where two plates collide. One of the plates is forced underneath the other. As the plate sinks, the earth’s heat and the friction of the movement cause a portion of the sinking plate to melt. This melted portion of plate is called magma, and when it reaches the earth’s surface it becomes a volcano. Volcanoes can also be created when two plates begin to diverge. Then, magma from below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out from the void. Volcanoes of this type usually are found not on land, but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid-Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean. The theory of plate tectonics also explains why some volcanic activity takes place so far from any known plate boundaries. Basically, these volcanoes are the result of huge column of magma, or plumes, that rise up and break through the surface of the earth.

The word “static” is closest in meaning to_________.

A. rock

B. well- defined

C. observable

D. unmovable

#Mẫu giáo

1

DH

Dương Hoàn Anh

5 tháng 6 2018

Câu đề bài: Từ “static ” gần nghĩa nhất với___________.

Static (adj): tĩnh, không chuyển động

Đáp án D: không di chuyển

Các đáp án còn lại:

A. đá

B. rành mạch

C. có thể quan sát được

Thông tin trong bài:

The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock.

—» Học thuyết cho rằng vỏ ngoài của Trái đất được chia thành nhiều phần đá rắn khác nhau được gọi là các mảng kiến tạo.

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LQ

Lê Quỳnh Anh

21 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 from 43 to 50. Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes...

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 43 to 50.

Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes place when and where it does is called the theory of “plate tectonics”. The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock. While their movement may appear insignificant, at only several inches per year, it is not. Indeed, the collisions between plates caused by this almost imperceptible movement can have catastrophic consequences. Volcanic activity and earthquakes are concentrated near the boundaries of these giant, moving plates.

The majority of volcanoes are formed at te point where two plates collide. One of the plates is forced underneath the other. As the plate sinks, the earth’s heat and the friction of the movement cause a portion of the sinking plate to melt. This melted portion of plate is called magma, and when it reaches the earth’s surface it becomes a volcano. Volcanoes can also be created when two plates begin to diverge. Then, magma from below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out from the void. Volcanoes of this type usually are found not on land, but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid-Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean. The theory of plate tectonics also explains why some volcanic activity takes place so far from any known plate boundaries. Basically, these volcanoes are the result of huge column of magma, or plumes, that rise up and break through the surface of the earth.

The word “imperceptible" is closest in meaning to____________.

A. dangerous

B. invisible

C. furious

D. geographic

#Mẫu giáo

1

DH

Dương Hoàn Anh

21 tháng 3 2017

Câu đề bài: Từ "imperceptible" gần nghĩa nhất với ___________.

Imperceptible (adj): không thể trông thấy

Đáp án B: vô hình

Các đáp án còn lại:

A. nguy hiểm C. giận dữ D. địa lí

Thông tin trong bài:

lndeed. the collisions between plates caused by this almost imperceptiblel movement can have catastrophie consequenees.

Thực tế thì, sự va chạm giữa các mảng kiến tạo gây ra bởi chuyển động hầu như vô hình này có thể có những hệ quả thảm khốc.

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LQ

Lê Quỳnh Anh

22 tháng 11 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 43 to 50. Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes...

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 43 to 50.

Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes place when and where it does is called the theory of “plate tectonics”. The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock. While their movement may appear insignificant, at only several inches per year, it is not. Indeed, the collisions between plates caused by this almost imperceptible movement can have catastrophic consequences. Volcanic activity and earthquakes are concentrated near the boundaries of these giant, moving plates.

The majority of volcanoes are formed at te point where two plates collide. One of the plates is forced underneath the other. As the plate sinks, the earth’s heat and the friction of the movement cause a portion of the sinking plate to melt. This melted portion of plate is called magma, and when it reaches the earth’s surface it becomes a volcano. Volcanoes can also be created when two plates begin to diverge. Then, magma from below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out from the void. Volcanoes of this type usually are found not on land, but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid-Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean. The theory of plate tectonics also explains why some volcanic activity takes place so far from any known plate boundaries. Basically, these volcanoes are the result of huge column of magma, or plumes, that rise up and break through the surface of the earth.

It can be inferred from the passage that the theory of plate tectonics is_______.

A. Unable to explain European volcanoes.

B. Better suited to explaining volcanic activity than that of earthquakes

C. Widely accepted

D. Used to predict the exact timing of earthquakes

#Mẫu giáo

1

DH

Dương Hoàn Anh

22 tháng 11 2017

Câu đề bài: Ta có thể suy ra từ đoạn văn rằng học thuyết về kiến tạo mang là ______.

Đáp án C: được chấp nhận rộng rãi

Các đáp án còn lại:

A. Không thể giải thích các núi lửa ở Châu Âu.

B. phù hợp hơn để giải thích hoạt động núi lửa hơn so với động đất

D. Được sử dụng để dự đoán thời gian chính xác của trận động đất

Thông tin trong bài: Ta thấy trong bài có nhắc nhiều đến “theory”, áp dụng nó vào giải thích nhiều hiện tượng chung, nên nó được nhiều người chấp nhận.

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LQ

Lê Quỳnh Anh

23 tháng 2 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 43 to 50. Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes...

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 43 to 50.

Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes place when and where it does is called the theory of “plate tectonics”. The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock. While their movement may appear insignificant, at only several inches per year, it is not. Indeed, the collisions between plates caused by this almost imperceptible movement can have catastrophic consequences. Volcanic activity and earthquakes are concentrated near the boundaries of these giant, moving plates.

The majority of volcanoes are formed at te point where two plates collide. One of the plates is forced underneath the other. As the plate sinks, the earth’s heat and the friction of the movement cause a portion of the sinking plate to melt. This melted portion of plate is called magma, and when it reaches the earth’s surface it becomes a volcano. Volcanoes can also be created when two plates begin to diverge. Then, magma from below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out from the void. Volcanoes of this type usually are found not on land, but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid-Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean. The theory of plate tectonics also explains why some volcanic activity takes place so far from any known plate boundaries. Basically, these volcanoes are the result of huge column of magma, or plumes, that rise up and break through the surface of the earth.

It can be inferred from the passage that____________.

A. Plates are very unlikely to move a kilometer in a year

B. Most earthquakes may be prevented

C. The Mid- Atlantic Ridge is visible from land

D. The plates will eventually stop moving

#Mẫu giáo

1

DH

Dương Hoàn Anh

23 tháng 2 2017

Câu đề bài: Có thể suy ra từ đoạn văn rằng___________.

Đáp án A: Các mảng kiến tạo rất khó di chuyển được đến một cây số trong một năm

Các đáp án còn lại:

B. Hầu hết động đất có thể ngăn chặn

C. Dãy núi trung du Đại Tây dương có thể được nhìn thấy từ đất liền

D. Các mảng kiến tạo cuối cùng sẽ ngừng di chuyển

Thông tin trong bài:

While their movement may appear insignificant, at only several inches per year, it is not.

—» Trong khi chuyển động của phiến đá có thể có vẻ không đáng kể, chỉ với vài inch mỗi năm, nhưng thực sự không phải vậy.

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LQ

Lê Quỳnh Anh

27 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 43 to 50. Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes...

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 43 to 50.

Most volcanoes are found along an imaginary belt, called the Ring of Fire, that encircles the Pacific Ocean. However, volcanic activity takes place in many far-flung regions of the world such as Hawaii, Iceland, Europe, and even the floor of the earth’s oceans. The leading theory as to why volcanic activity, as well as earthquakes, takes place when and where it does is called the theory of “plate tectonics”. The theory holds that the outer shell of the earth is divided into many different rigid sections of rock, called plates. These plates are not static, they are in continuous motion over a layer of partly melted rock. While their movement may appear insignificant, at only several inches per year, it is not. Indeed, the collisions between plates caused by this almost imperceptible movement can have catastrophic consequences. Volcanic activity and earthquakes are concentrated near the boundaries of these giant, moving plates.

The majority of volcanoes are formed at te point where two plates collide. One of the plates is forced underneath the other. As the plate sinks, the earth’s heat and the friction of the movement cause a portion of the sinking plate to melt. This melted portion of plate is called magma, and when it reaches the earth’s surface it becomes a volcano. Volcanoes can also be created when two plates begin to diverge. Then, magma from below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out from the void. Volcanoes of this type usually are found not on land, but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid-Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean. The theory of plate tectonics also explains why some volcanic activity takes place so far from any known plate boundaries. Basically, these volcanoes are the result of huge column of magma, or plumes, that rise up and break through the surface of the earth.

Which of the following is true about volcanoes formed at the point at which two plates diverged?

A. Most volcanoes are formed in this way

B. Plate tectonic theory is not able to explain it

C. The Mid- Atlantic Ridge is an example of this

D. They do not involve magma

#Mẫu giáo

1

DH

Dương Hoàn Anh

27 tháng 5 2018

Chọn B Câu đề bài: Điều nào sau đây nói đúng về núi lửa hình thành tại điểm mà tại đó hai mảng kiến tạo phân kỳ?

Đáp án C: Dãy núi trung du Đại Tây dương là một ví dụ tiêu biểu

Các đáp án còn lại:

A. Hầu hết các núi lửa hình thành theo cách này

B. Học thuyết kiến tạo mảng không thể giải thích được

D. Chúng không bao gồm đá nóng chảy

Thông tin trong bài:

Volcanoes can also be created when two plates begin to diverge. Then, magmafram below the earth’s crust moves up to fill the void between the two plates. Large quantities of lava spill out fiom the void. Volcanoes of this type usually are found not on land. but on the ocean floor. In extreme instances this can lead to the formation of gigantic, sunken mountain ranges like Mid- Atlantic Ridge that spans nearly the entire length of the Atlantic Ocean.

Núi lửa cũng có thể được tạo ra khi hai mảng kiến tạo bắt đầu phân kì. Sau đó, magma từ bên dưới lớp vỏ trái đất di chuyển lên để lấp đầy khoảng trống giữa hai mảng. Một lượng lớn dung nham tràn ra từ khoảng trống. Các loại núi lửa thuộc loại này thường không được tìm thấy trên đất liền, mà ở thềm đại dương. Trong những trường hợp cùng cực, điều này có thể dẫn đến sự hình thành các dãy núi khổng lồ, trũng như Mid-Atlantic Ridge (dãy núi trung du Đại Tây dương) trải dài gần như toàn bộ chiều dài của Đại Tây Dương.

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