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11 tháng 6 2017

Đáp án C

Kiến thức: Cấu trúc đảo ngữ trong so sánh hơn S + be + adj-er than be + S

Tạm dịch: Mặt trăng gần Trái Đất hơn Mặt trời gần trái đất, và vì vậy nó có ảnh hưởng lớn hơn đến thủy triều

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question. Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions. The Moon is a main factor controlling ordinary tides. At the...
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 for the question.

 Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

 The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

 Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.

 Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods. 

Which of the following does not relate to Ordinary Tides ? 

A. Receiving greatest influence from the Moon

B. Influenced by the Sun’s position relative to the Moon.

C. Taking turns the higher and lower water relatinag to the Earth’s rotation

D. Having the striking range of tide in narrower bays

1
28 tháng 8 2017

Đáp án là B.

Câu nào sau đây không liên quan đến thủy triều bình thường?

A. Nhận ảnh hưởng lớn nhất từ mặt trăng.

B. Bị ảnh hưởng bởi vị trí của mặt trời liên quan đến mặt trăng.

C. Luân phiên nước thấp hơn và cao hơn liên quan đến sự luân chuyển của Trái Đất.

D. Có phạm vị rung chuyển thủy triều ở những vịnh hẹp hơn.

Dẫn chứng: The Moon is a main factor controlling ordinary tides

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question. Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions. The Moon is a main factor controlling ordinary tides. At the...
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 for the question.

 Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

 The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

 Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.

 Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods. 

The word imperceptible in the last paragraph could best be replace by

A. not noticeable 

B. difficult to explain 

C. not generally 

D. not able to be said

1
27 tháng 2 2019

Đáp án là A.

Từ “imperceptible” ở đoạn văn cuối có thể được thay thế tốt nhất bởi

A. Không nhìn ra được

B. Khó giải thích

C. Không chung chung                         

D. Khó nói/ không thể nói được

These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides.

=>imperceptible = not noticeable

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question. Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions. The Moon is a main factor controlling ordinary tides. At the...
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 for the question.

 Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

 The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

 Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.

 Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods. 

The word exerts in paragraph 2 is closest in meaning to

A. mixes with 

B. bring into use

C. infers from 

D. connects with

1
4 tháng 2 2017

Đáp án là B.

Từ “exerts” ở đoạn 2 gần nghĩa nhất với

A. trộn lẫn với

B. đưa vào sử dụng

C. suy ra từ

D. liên quan đến

The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water.

[ Mặt trăng là nhân tố chính gây ra thủy triều bình thường. Tại vị trí trên trái đất gần Mặt trăng nhất, nó sử dụng trọng lực mạnh mẽ đẩy nước.]

=>exert = bring into use: sử dụng

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question. Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions. The Moon is a main factor controlling ordinary tides. At the...
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 for the question.

 Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

 The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

 Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.

 Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods. 

What is true about the Moon’s gravitational force? 

A. It pulls water on the far side of the Earth more strongly.

B. It is more than twice as powerful as that of the Sun.

C. It has reduced gravity when it is lined up with the Sun and the Earth.

D. Its force is strongest when it is located at 90 degrees to the Earth.

1
24 tháng 11 2017

Đáp án là B.

Câu nào sau đây đúng về lực hút của mặt trăng?

A. Nó đẩy nước ở phía xa Trái Đất mạnh hơn.

B. Nó mạnh hơn mặt trời gấp hai lần.

C. Nó giảm trọng lực khi mặt trăng và mặt trời thẳng hàng với nhau.

D. Lực của nó mạnh nhất khi được đặt ở 90o so với Trái Đất.

Dẫn chứng: Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force.

[ Hai dạng còn lại của thủy triều bị ảnh hưởng bởi Mặt Trời, xa Trái Đất hơn và sử dụng ít hơn phân nửa trọng lực.]

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question. Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions. The Moon is a main factor controlling ordinary tides. At the...
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 for the question.

 Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

 The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

 Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.

 Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods. 

Why does the author mention tsunamis in the passage?

A. To explain that not all tides are caused by gravity. 

B. To give an example of an extreme tidal phenomenon

C. To show that they are not related to natural tides

D. To suggest that more categories for tides area needed.

1
31 tháng 8 2018

Đáp án là C.

Tại sao tác giả đề cập đến sóng thần trong bào đọc?

A. Để giải thích rằng không phải tất cả thủy triều được gây ra bởi trọng lực.

B. Để đưa ra ví dụ về hiện tượng thủy triều khắc nghiệt.

C. Để cho thấy rằng chúng không liên quan đến thủy triều tự nhiên.

D. Để đề nghị rằng nhiều loại thủy triều trong khu vực cần có.

Dẫn chứng: It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

[ Rất quan trọng để phân biệt giữa hiện tượng thủy triều bình thường và những đợt sống thần lớn, với sóng thần do động đất và sự phun trào núi lửa dưới 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 for the question. Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions. The Moon is a main factor controlling ordinary tides. At the...
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 for the question.

 Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

 The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

 Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.

 Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods. 

What can be inferred about Canada’s Bay of Fundy ? 

A. It may experience tsunamis because of its extreme tides. 

B. It may have a longer tide cycle because of its wide variations

C. It may be very narrow because it has wide tidal variations.

D. It may be influenced more by gravity than other places.

1
21 tháng 3 2019

Đáp án là C.

Có thể suy ra gì về Canada’s Bay of Fundy?

A. Nó có thể trải qua sóng thần do thủy triều cực đại.

B. Nó có thể có chu ký thủy triều dài hơn do sự đa dạng.

C. Nó có thể rất hẹp vì có nhiều thủy triều khác nhau biên độ lớn.

D. Nó có thể bị ảnh hưởng nhiều hơn bởi trọng lực so với những nơi khác.

Dẫn chứng: The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

[ Sự khác nhau về độ cao giữa nước cao và nước thấp được gọi là biên độ thủy triều, và nó khá là kịch tính ở những vịnh hẹp hơn. Canada’s bays of Fundy , ví dụ, trải nghiệm phổ biến những vùng thủy triều mạnh nhất thế giới, với sự khác nhau mỗi ngày 16 mét.]

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question. Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions. The Moon is a main factor controlling ordinary tides. At the...
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 for the question.

 Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.

 The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.

 Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.

 Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods. 

Besides ordinary tides, how many other types of tide are mentioned in the passage ?

A. two 

B. three 

C. four 

D. five

1
11 tháng 12 2017

Đáp án là C.

Bên cạnh thủy triều bình thường, đoạn văn đề cập bao nhiêu loại thủy triều nữa trong bài đọc?

Dẫn chứng: the solar and lunar gravitational forces add up to produce higher spring tides.

This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks.

These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides.

Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere.

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

1
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.