Muft Shiksha
Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
Class 11GeographyInterior of the EarthInterior structure of the earthHard
0 reads0 ratings0 helpful

Which option gives an incorrect match of discontinuity and boundary?

Answer and explanation

Correct answer: Gutenberg crust and mantle

The direct answer is D: Gutenberg–crust and mantle is the incorrect match. A discontinuity is a boundary where seismic-wave behaviour changes because the material or composition changes. The Moho lies between the crust and mantle, so A is correct. The Gutenberg discontinuity lies between the mantle and the outer core, so B is correct. The Lehmann discontinuity is associated with the boundary between the outer and inner core, so C is accepted as correct at this level. Gutenberg is not the crust–mantle boundary; that boundary is Moho. Therefore D is the incorrect pairing. Do not confuse the names: Moho means crust–mantle, Gutenberg means mantle–outer core, and Lehmann means outer–inner core.

Related tags

DiscontinuitiesGutenbergMoho
सुधार सुझाएँ / Earn

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

KEEP PRACTISING

10 more MCQs
  1. 1If increase in seismic wave velocity and gravity value occur together what cautious conclusion is suitable?
  2. 2If wave velocity changes at the Moho boundary which conclusion is most suitable?
  3. 3If wave behavior changes at the Lehmann boundary it will be related to what?
  4. 4Why is the geothermal gradient considered a concept different from surface weather?
  5. 5If crust sample has light minerals but Earth's mean density is high what conclusion is suitable?
  6. 6Magnetic field and absence of S waves together can give what type of core clue?
  7. 7If a sample is obtained only from the upper crust, for which region can the conclusion drawn from it be considered most reliable?
  8. 8If Lehmann boundary and Moho boundary are treated as same what is the error?
  9. 9With reference to Earth's interior and seismic waves, which of the following cause-and-effect relationships is correct?
  10. 10If pressure and temperature increase with depth, why is it difficult to predict the behavior of deep materials from samples obtained at the surface?
Found an issue? Help improve this questionMy reports and replies

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.