Câu hỏi:
15/09/2023 335
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?
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?
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Trả lời:
Giải bởi Vietjack
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.]
=>Chọn C
Câu hỏi cùng đoạn
Câu 2:
The word imperceptible in the last paragraph could best be replace by
The word imperceptible in the last paragraph could best be replace by
Đáp án chính xác
Lời giải của GV VietJack
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 => Chọn A
Câu 3:
What is true about the Moon’s gravitational force?
What is true about the Moon’s gravitational force?
Đáp án chính xác
Lời giải của GV VietJack
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.]
=>Chọn B
Câu 4:
Besides ordinary tides, how many other types of tide are mentioned in the passage ?
Besides ordinary tides, how many other types of tide are mentioned in the passage ?
Đáp án chính xác
Lời giải của GV VietJack
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.
=>Chọn C
Câu 5:
Which of the following does not relate to Ordinary Tides ?
Which of the following does not relate to Ordinary Tides ?
Đáp án chính xác
Lời giải của GV VietJack
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.
=>Chọn B
Nhà sách VIETJACK:
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