Insights Static Quiz -12, 2018
0 of 5 questions completed Questions:INSIGHTS IAS QUIZ ON STATIC SYLLABUS - 2018
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Question 1 of 5
1. Question
With reference to the Mohorovicic discontinuity, consider the following statements:
- It is the boundary between the Earth’s crust and the mantle
- The depth of Mohorovicic discontinuity is higher under the oceanic crust than it is below continental crust
Which of the above statements is/are correct?
Correct
- Solution: a)
There was a question on Mohorovičić discontinuity, in CSP-2012.
Moho, or Mohorovičić discontinuity, boundary between the Earth’s crust and its mantle. The Moho lies at a depth of about 22 mi (35 km) below continents and about 4.5 mi (7 km) beneath the oceanic crust. Modern instruments have determined that the velocity of seismic waves increases rapidly at this boundary. The Moho was named for Andrija Mohorovičić.
Incorrect
- Solution: a)
There was a question on Mohorovičić discontinuity, in CSP-2012.
Moho, or Mohorovičić discontinuity, boundary between the Earth’s crust and its mantle. The Moho lies at a depth of about 22 mi (35 km) below continents and about 4.5 mi (7 km) beneath the oceanic crust. Modern instruments have determined that the velocity of seismic waves increases rapidly at this boundary. The Moho was named for Andrija Mohorovičić.
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Question 2 of 5
2. Question
The continental rise is an underwater feature found between
Correct
Solution: b)
The continental rise is an underwater feature found between the continental slope and the abyssal plain. This feature can be found all around the world, and it represents the final stage in the boundary between continents and the deepest part of the ocean. The environment in the continental rise is quite unique, and many oceanographers study it extensively in the hopes of learning more about the ocean and geologic history.
Incorrect
Solution: b)
The continental rise is an underwater feature found between the continental slope and the abyssal plain. This feature can be found all around the world, and it represents the final stage in the boundary between continents and the deepest part of the ocean. The environment in the continental rise is quite unique, and many oceanographers study it extensively in the hopes of learning more about the ocean and geologic history.
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Question 3 of 5
3. Question
Consider the following statements:
- The Earth rotates faster at the Equator than it does at the poles
- The Coriolis Force is more affected by Earth’s revolution that its rotation
Which of the above statements is/are correct?
Correct
Solution: a)
The key to the Coriolis effect lies in the Earth’s rotation. The Earth rotates faster at the Equator than it does at the poles. This is because the Earth is wider at the Equator. A point on the Equator has farther to travel in a day.
https://www.nationalgeographic.org/encyclopedia/coriolis-effect/
Incorrect
Solution: a)
The key to the Coriolis effect lies in the Earth’s rotation. The Earth rotates faster at the Equator than it does at the poles. This is because the Earth is wider at the Equator. A point on the Equator has farther to travel in a day.
https://www.nationalgeographic.org/encyclopedia/coriolis-effect/
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Question 4 of 5
4. Question
With reference to tropical cyclones, consider the following statements:
- They occur during January–March in the Southern Hemisphere
- The rotate in a clockwise (or anticyclonic) direction in the Southern Hemisphere
Which of the above statements is/are correct?
Correct
Solution: c)
Many questions on tropical cyclones have been asked in UPSC CSP.
Every year during the late summer months (July–September in the Northern Hemisphere and January–March in the Southern Hemisphere), cyclones strike regions as far apart as the Gulf Coast of North America, northwestern Australia, and eastern India and Bangladesh.
Tropical cyclones are compact, circular storms, generally some 320 km (200 miles) in diameter, whose winds swirl around a central region of low atmospheric pressure. The winds are driven by this low-pressure core and by the rotation of Earth, which deflects the path of the wind through a phenomenon known as the Coriolis force. As a result, tropical cyclones rotate in a counterclockwise (or cyclonic) direction in the Northern Hemisphere and in a clockwise (or anticyclonic) direction in the Southern Hemisphere.
Incorrect
Solution: c)
Many questions on tropical cyclones have been asked in UPSC CSP.
Every year during the late summer months (July–September in the Northern Hemisphere and January–March in the Southern Hemisphere), cyclones strike regions as far apart as the Gulf Coast of North America, northwestern Australia, and eastern India and Bangladesh.
Tropical cyclones are compact, circular storms, generally some 320 km (200 miles) in diameter, whose winds swirl around a central region of low atmospheric pressure. The winds are driven by this low-pressure core and by the rotation of Earth, which deflects the path of the wind through a phenomenon known as the Coriolis force. As a result, tropical cyclones rotate in a counterclockwise (or cyclonic) direction in the Northern Hemisphere and in a clockwise (or anticyclonic) direction in the Southern Hemisphere.
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Question 5 of 5
5. Question
Which of the following factors have an impact on Earth’s shape?
- Distribution of mass on Earth
- Postglacial rebound
- Gravitational pull of the moon and sun
Select the correct answer using codes below:
Correct
Solution: d)
Earth’s shape also changes over time due to a menagerie of other dynamic factors. Mass shifts around inside the planet, altering those gravitational anomalies. Mountains and valleys emerge and disappear due to plate tectonics. Occasionally meteors crater the surface. And the gravitational pull of the moon and sun not only cause ocean and atmospheric tides but earth tides as well.
In addition, the changing weight of the oceans and atmosphere can cause deformations of the crust “on the order of a centimeter or so,” notes geophysicist Richard Gross at the Jet Propulsion Laboratory in Pasadena, Calif. “There’s also postglacial rebound, with the crust and mantle that were depressed by the huge ice sheets that sat on the surface during the last ice age now rebounding upward on the order of a centimeter a year.”
Moreover, to even out Earth’s imbalanced distribution of mass and stabilize its spin, “the entire surface of the Earth will rotate and try to redistribute mass along the equator, a process called true polar wander,” Meert says.
Source: https://www.scientificamerican.com/article/earth-is-not-round/
Incorrect
Solution: d)
Earth’s shape also changes over time due to a menagerie of other dynamic factors. Mass shifts around inside the planet, altering those gravitational anomalies. Mountains and valleys emerge and disappear due to plate tectonics. Occasionally meteors crater the surface. And the gravitational pull of the moon and sun not only cause ocean and atmospheric tides but earth tides as well.
In addition, the changing weight of the oceans and atmosphere can cause deformations of the crust “on the order of a centimeter or so,” notes geophysicist Richard Gross at the Jet Propulsion Laboratory in Pasadena, Calif. “There’s also postglacial rebound, with the crust and mantle that were depressed by the huge ice sheets that sat on the surface during the last ice age now rebounding upward on the order of a centimeter a year.”
Moreover, to even out Earth’s imbalanced distribution of mass and stabilize its spin, “the entire surface of the Earth will rotate and try to redistribute mass along the equator, a process called true polar wander,” Meert says.
Source: https://www.scientificamerican.com/article/earth-is-not-round/
