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With regard to interior of the Earth, consider the following statements:
(1) The density of continental crust is more than that of oceanic crust.
(2) Guttenberg discontinuity exists between the crust and the mantle.
Which of the above statement(s) is/are correct?
(1) The density of continental crust is more than that of oceanic crust.
(2) Guttenberg discontinuity exists between the crust and the mantle.
Which of the above statement(s) is/are correct?
- a)Only 1
- b)Only 2
- c)Both 1 and 2
- d)None of the above
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
With regard to interior of the Earth, consider the following statement...
Statement 1 is incorrect because oceanic crust is more thinner, denser, younger and of different chemical composition.
Statement 2 is incorrect because the boundary between the crust and the upper mantle is called Mohorovicic discontinuity. While Guttenberg discontinuity refers to the boundary between the lower mantle and the outer core.
Statement 2 is incorrect because the boundary between the crust and the upper mantle is called Mohorovicic discontinuity. While Guttenberg discontinuity refers to the boundary between the lower mantle and the outer core.
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With regard to interior of the Earth, consider the following statement...
Statement 1: The density of continental crust is more than that of oceanic crust.
The density of continental crust is less than that of oceanic crust. Continental crust is composed mainly of granite, which has a lower density compared to the basaltic composition of oceanic crust. Continental crust is also thicker and less dense due to the presence of lighter minerals such as quartz and feldspar. On the other hand, oceanic crust is denser because it is mainly composed of basalt, which is denser than granite. Therefore, statement 1 is incorrect.
Statement 2: Guttenberg discontinuity exists between the crust and the mantle.
The Guttenberg discontinuity, also known as the Mohorovičić discontinuity or simply the Moho, is the boundary between the crust and the mantle. It represents a significant change in seismic wave velocities, indicating a change in composition and density. The crust is composed of lighter rocks, while the mantle is composed of denser rocks. The Moho is typically located at a depth of around 5-40 kilometers beneath the continents and around 5-10 kilometers beneath the ocean floor. Therefore, statement 2 is correct.
Conclusion:
Based on the above analysis, we can conclude that only statement 2 is correct. The density of continental crust is less than that of oceanic crust, making statement 1 incorrect. The Guttenberg discontinuity exists between the crust and the mantle, supporting statement 2. Therefore, the correct option is D) None of the above.
The density of continental crust is less than that of oceanic crust. Continental crust is composed mainly of granite, which has a lower density compared to the basaltic composition of oceanic crust. Continental crust is also thicker and less dense due to the presence of lighter minerals such as quartz and feldspar. On the other hand, oceanic crust is denser because it is mainly composed of basalt, which is denser than granite. Therefore, statement 1 is incorrect.
Statement 2: Guttenberg discontinuity exists between the crust and the mantle.
The Guttenberg discontinuity, also known as the Mohorovičić discontinuity or simply the Moho, is the boundary between the crust and the mantle. It represents a significant change in seismic wave velocities, indicating a change in composition and density. The crust is composed of lighter rocks, while the mantle is composed of denser rocks. The Moho is typically located at a depth of around 5-40 kilometers beneath the continents and around 5-10 kilometers beneath the ocean floor. Therefore, statement 2 is correct.
Conclusion:
Based on the above analysis, we can conclude that only statement 2 is correct. The density of continental crust is less than that of oceanic crust, making statement 1 incorrect. The Guttenberg discontinuity exists between the crust and the mantle, supporting statement 2. Therefore, the correct option is D) None of the above.
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With regard to interior of the Earth, consider the following statements:(1) The density of continental crust is more than that of oceanic crust.(2) Guttenberg discontinuity exists between the crust and the mantle.Which of the above statement(s) is/are correct?a)Only 1b)Only 2c)Both 1 and 2d)None of the aboveCorrect answer is option 'D'. Can you explain this answer?
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