Các câu hỏi tương tự
Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction from:A galaxy, where (A) may include billions of (B) stars, is (C) held together (D) by gravitation attraction A. where B. of C. is D. together
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Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction from:
A galaxy, where (A) may include billions of (B) stars, is (C) held together (D) by gravitation attraction
A. where
B. of
C. is
D. together
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. Next week when there (A) will be a (B) full moon, (C) the ocean tides (D) will be higher. A. will be B. full moon C. the ocean D. will be
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Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Next week when there (A) will be a (B) full moon, (C) the ocean tides (D) will be higher.
A. will be
B. full moon
C. the ocean
D. will be
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. The moon is the nearest planet to the earth. It causes tides on the earth. A. The moon is the nearest planet to the earth, which causes tides on the earth. B. The moon which nearest planet to the earth, causes tides on the earth. C. The moon, which is the nearest planet to the earth, causes tides on the earth. D. The moon causes tides on the eart...
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Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
The moon is the nearest planet to the earth. It causes tides on the earth.
A. The moon is the nearest planet to the earth, which causes tides on the earth.
B. The moon which nearest planet to the earth, causes tides on the earth.
C. The moon, which is the nearest planet to the earth, causes tides on the earth.
D. The moon causes tides on the earth, is the nearest planet to the earth.
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.Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements felt no more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fath...
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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.
Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements felt no more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fathoms despite their impressive sweep.
The tides are a response of the waters of the ocean to the pull of the Moon and the more distant Sun. In theory, there is a gravitational attraction between the water and even the outermost star of the universe. In reality, however, the pull of remote stars is so slight as to be obliterated by the control of the Moon and, to a lesser extent, the Sun.
Just as the Moon rises later each day by fifty minutes, on the average, so, in most places, the time of high tide is correspondingly later each day. And as the Moon waxes and wanes in its monthly cycle, so the height of the tide varies. The tidal movements are strongest when the Moon is a sliver in the sky, and when it is full. These are the highest flood tides and the lowest ebb tides of the lunar month and are called the spring tides. At these times the Sun, Moon, and Earth are nearly in line and the pull of the two heavenly bodies is added together to bring the water high on the beaches, to send its surf upward against the sea cliffs, and to draw a high tide into the harbors. Twice each month, at the quarters of the Moon, when the Sun, Moon, and Earth lie at the apexes of a triangular configuration and the pull of the Sun and Moon are opposed, the moderate tidal movements called neap tides occur. Then the difference between high and low water is less than at any other time during the month.
It can be inferred from the passage that the most important factor in determining how much gravitational effect one object in space has on the tides is
A. size
B. distance
C. temperature
D. density
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...
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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.
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.Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements felt no more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fath...
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.
Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements felt no more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fathoms despite their impressive sweep.
The tides are a response of the waters of the ocean to the pull of the Moon and the more distant Sun. In theory, there is a gravitational attraction between the water and even the outermost star of the universe. In reality, however, the pull of remote stars is so slight as to be obliterated by the control of the Moon and, to a lesser extent, the Sun.
Just as the Moon rises later each day by fifty minutes, on the average, so, in most places, the time of high tide is correspondingly later each day. And as the Moon waxes and wanes in its monthly cycle, so the height of the tide varies. The tidal movements are strongest when the Moon is a sliver in the sky, and when it is full. These are the highest flood tides and the lowest ebb tides of the lunar month and are called the spring tides. At these times the Sun, Moon, and Earth are nearly in line and the pull of the two heavenly bodies is added together to bring the water high on the beaches, to send its surf upward against the sea cliffs, and to draw a high tide into the harbors. Twice each month, at the quarters of the Moon, when the Sun, Moon, and Earth lie at the apexes of a triangular configuration and the pull of the Sun and Moon are opposed, the moderate tidal movements called neap tides occur. Then the difference between high and low water is less than at any other time during the month
What is the cause of spring tides?
A. Seasonal changes in the weather
B. The gravitational pull of the Sun and the Moon when nearly in line with the Earth
C. The Earth's movement around the Sun
D. The triangular arrangement of the Earth, Sun, and Moon
Mark the letter A, B, C, or D on your answer sheer to indicate the underlined part that needs correction in each of the following questions. Every day in summer, but especially at (A) the weekends, all kinds of vehicles bring (B) crowds of people (C) to enjoy the various attraction (D). A. at B. bring C. crowds of people D. attraction
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Mark the letter A, B, C, or D on your answer sheer to indicate the underlined part that needs correction in each of the following questions.
Every day in summer, but especially at (A) the weekends, all kinds of vehicles bring (B) crowds of people (C) to enjoy the various attraction (D).
A. at
B. bring
C. crowds of people
D. attraction
Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions.We should also take into account a fact that unemployment causes poverty A. also B. a C. that D. causes
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Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions.
We should also take into account a fact that unemployment causes poverty
A. also
B. a
C. that
D. causes
Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction(A) A paragraph is a portion of a text (B) consists of one or more (C) sentences (D) related to the same idea. A. A paragraph B. consists of C. sentences D. related
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Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction
(A) A paragraph is a portion of a text (B) consists of one or more (C) sentences (D) related to the same idea.
A. A paragraph
B. consists of
C. sentences
D. related