Insights Static Quiz -126, 2018
Physical Geography and Environment
INSIGHTS IAS QUIZ ON STATIC SYLLABUS - 2018
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Question 1 of 5
1. Question
Mercalli intensity scale to measure earthquakes specifically denotes
Correct
Answer – A
- The intensity scale is named after Mercalli, an Italian seismologist. The intensity scale takes into account the visible damage caused by the event. The range of intensity scale is from 1-12.
Incorrect
Answer – A
- The intensity scale is named after Mercalli, an Italian seismologist. The intensity scale takes into account the visible damage caused by the event. The range of intensity scale is from 1-12.
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Question 2 of 5
2. Question
Consider the statements below
- Shadow zone of S waves is more than 40% of earth surface
- S waves do not pass through core of the earth
Which of the above is correct
Correct
Answer – C
- The entire zone beyond 105° does not receive S-waves. The shadow zone of S-wave is much larger than that of the P-waves. The shadow zone of P-waves appears as a band around the earth between 105° and 145° away from the epicentre. The shadow zone of S-waves is not only larger in extent but it is also a little over 40 per cent of the earth surface
Incorrect
Answer – C
- The entire zone beyond 105° does not receive S-waves. The shadow zone of S-wave is much larger than that of the P-waves. The shadow zone of P-waves appears as a band around the earth between 105° and 145° away from the epicentre. The shadow zone of S-waves is not only larger in extent but it is also a little over 40 per cent of the earth surface
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Question 3 of 5
3. Question
Consider the following statements
- Each earthquake has different shadow zone
- The angle for the shadow zone are measured from origin point of earthquake
Which of thely above is/are correct
Correct
Answer – A
- There exist some specific areas where the waves are not reported. Such a zone is called the ‘shadow zone’.
- Seismographs located at any distance within 105° from the epicentre, recorded the arrival of both P and S-waves. However, the seismographs located beyond 145° from epicentre, record the arrival of P-waves, but not that of S-waves. Thus, a zone between 105° and 145° from epicentre was identified as the shadow zone for both the types of waves.
- As for each earthquake, epicentre differs, so does the shadow zone.
Incorrect
Answer – A
- There exist some specific areas where the waves are not reported. Such a zone is called the ‘shadow zone’.
- Seismographs located at any distance within 105° from the epicentre, recorded the arrival of both P and S-waves. However, the seismographs located beyond 145° from epicentre, record the arrival of P-waves, but not that of S-waves. Thus, a zone between 105° and 145° from epicentre was identified as the shadow zone for both the types of waves.
- As for each earthquake, epicentre differs, so does the shadow zone.
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Question 4 of 5
4. Question
Moho discontinuity refers to the break between
Correct
Answer – A
- The portion of the interior beyond the crust is called the mantle. The mantle extends from Moho’s discontinuity to a depth of 2,900 km. The upper portion of the mantle is called asthenosphere.
Incorrect
Answer – A
- The portion of the interior beyond the crust is called the mantle. The mantle extends from Moho’s discontinuity to a depth of 2,900 km. The upper portion of the mantle is called asthenosphere.
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Question 5 of 5
5. Question
Consider the following statements
- Oceanic crust is shallower than continental crust
- Oceanic crust is made up of basalt
Which of the above is/are correct
Correct
Answer – C
- The thickness of the crust varies under the oceanic and continental areas. Oceanic crust is thinner as compared to the continental crust. The mean thickness of oceanic crust is 5 km whereas that of the continental is around 30 km. The continental crust is thicker in the areas of major mountain systems. It is as much as 70 km thick in the Himalayan region.
- It is made up of heavier rocks having density of 3 g/cm3. This type of rock found in the oceanic crust is basalt. The mean density of material in oceanic crust is 2.7 g/cm3.
Incorrect
Answer – C
- The thickness of the crust varies under the oceanic and continental areas. Oceanic crust is thinner as compared to the continental crust. The mean thickness of oceanic crust is 5 km whereas that of the continental is around 30 km. The continental crust is thicker in the areas of major mountain systems. It is as much as 70 km thick in the Himalayan region.
- It is made up of heavier rocks having density of 3 g/cm3. This type of rock found in the oceanic crust is basalt. The mean density of material in oceanic crust is 2.7 g/cm3.
