18th June Static Quiz 2021
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18th June Static Quiz 2021 for UPSC Prelims
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- Question 1 of 5
1. Question
With reference to core of earth, which of the following are correct?
1. The outer core is in solid state, while inner core is in liquid state.
2. The core is constituted by heavy materials like nickel and iron namely “NiFe” layer.
Select the correct answer from the following codesCorrectAns;- b) Only 2
Explanation:-
• Statement 1 is incorrect , Statement 2 is correct ,because Outer core is Liquid , while inner core is solid.
• The core-mantle boundary is positioned at the depth of 2,900 km.
• The inner core is in the solid-state whereas the outer core is in the liquid state. The core is made up of very heavy material mostly constituted by nickel and iron. Hence it is also called the “NiFe” layer.
Above image of Cross Section of Earth.
Above image of Interior Earth Structure.
• The density of material at mantle core bounder is around 5g/cm3 and at centre of earth at 6300 Km the density is 13g/cm3.IncorrectAns;- b) Only 2
Explanation:-
• Statement 1 is incorrect , Statement 2 is correct ,because Outer core is Liquid , while inner core is solid.
• The core-mantle boundary is positioned at the depth of 2,900 km.
• The inner core is in the solid-state whereas the outer core is in the liquid state. The core is made up of very heavy material mostly constituted by nickel and iron. Hence it is also called the “NiFe” layer.Above image of Cross Section of Earth.
Above image of Interior Earth Structure.
• The density of material at mantle core bounder is around 5g/cm3 and at centre of earth at 6300 Km the density is 13g/cm3. - Question 2 of 5
2. Question
Which of the following discontinuity separates the Upper and Lower Mantle?
CorrectAns;- c) Repiti
Explanation;-
• Below attached image has all the discontinuity , Repiti is the one discontinuity that separates the upper and lower mantle.
• All the layers are separated from each other through a transition zone. These transition zones are called discontinuities. There are five discontinuities inside the earth.
IncorrectAns;- c) Repiti
Explanation;-
• Below attached image has all the discontinuity , Repiti is the one discontinuity that separates the upper and lower mantle.
• All the layers are separated from each other through a transition zone. These transition zones are called discontinuities. There are five discontinuities inside the earth. - Question 3 of 5
3. Question
Consider the following statements regarding layered structure of earth.
1) Inner Core is the densest layer of earth’s interior.
2) Continental crust is less dense than the oceanic crust.Choose the not correct statements?
CorrectAns;- d) None of the above
Explanation:-
As question is asked to choose not correct , but all the statements are correct, that’s y answer is d) None of the above.
• The Crust is the outermost solid part of the earth. It is brittle in nature. The thickness of the crust varies under the oceanic and continental areas.
• Oceanic crust is thinner as compared to the continental crust. The oceanic crust is basalt and the mean density of material in oceanic crust is 2.7 g/cm3.
• The outer core is in liquid state while the inner core is in solid state.
• At the centre of the earth at 6,300 km, the density value is around 13g/cm3.
• The core is made up of very heavy material mostly constituted by nickel and iron. It is sometimes referred to as the NiFe layer.
IncorrectAns;- d) None of the above
Explanation:-
As question is asked to choose not correct , but all the statements are correct, that’s y answer is d) None of the above.
• The Crust is the outermost solid part of the earth. It is brittle in nature. The thickness of the crust varies under the oceanic and continental areas.
• Oceanic crust is thinner as compared to the continental crust. The oceanic crust is basalt and the mean density of material in oceanic crust is 2.7 g/cm3.
• The outer core is in liquid state while the inner core is in solid state.
• At the centre of the earth at 6,300 km, the density value is around 13g/cm3.
• The core is made up of very heavy material mostly constituted by nickel and iron. It is sometimes referred to as the NiFe layer.
- Question 4 of 5
4. Question
What has been the most useful method for determining the structure of the earth’s interior?
CorrectAns;- d) Seismology
Explanation;-
• Seismic waves tell us about the earth’s internal structure in great detail because of the way the waves refract, reflect, and absorb at various boundaries to produce shadow zones, etc.
Above image of various seismic waves and its types.
IncorrectAns;- d) Seismology
Explanation;-
• Seismic waves tell us about the earth’s internal structure in great detail because of the way the waves refract, reflect, and absorb at various boundaries to produce shadow zones, etc.
Above image of various seismic waves and its types.
- Question 5 of 5
5. Question
What is the Lithosphere composed of?
CorrectAns;- b) The crust and uppermost mantle
Explanation;-
• The lithosphere is the crust and rigid upper mantle above the asthenosphere (as shown in the below attached image).
IncorrectAns;- b) The crust and uppermost mantle
Explanation;-
• The lithosphere is the crust and rigid upper mantle above the asthenosphere (as shown in the below attached image).
