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Subjects

Geography

Interior structure of the earth

In Class 11 Geography, this topic from the chapter “Interior of the Earth” explains how scientists understand the planet’s hidden layers. Students study the crust, mantle, and core, along with the differences between the inner and outer core. They explore how seismic waves, gravity, density, temperature, and pressure provide evidence about Earth’s composition and physical state. The topic also introduces major discontinuities that mark boundaries between layers and helps connect Earth’s internal structure with processes such as volcanism, earthquakes, and plate movement.

Expert · Level 5 · 25 questions

Practice questions

01Mineral phase changes inside Earth can cause what?

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02Why are direct evidences limited in Earth internal structure?

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03Separation of materials into Earth layers in early Earth is associated with which process?

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04Why is sharp difference in physical properties at the core-mantle boundary important?

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05Inner core and outer core may have similar composition yet why is their state different?

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06Why are magnetic evidences considered indirect in studying Earth interior?

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07Why is a multi-source approach necessary to understand Earth internal structure?

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08What would be the most balanced conclusion in expert study of Earth internal structure?

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09Why are discontinuities most useful for identifying layers inside Earth?

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10What does increase in P-wave velocity while entering mantle from crust indicate?

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11If S-waves are absent over a very large area in an earthquake record what is the main reason?

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12What is the biggest limitation of direct sources in studying Earth interior?

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13How does planetary differentiation explain Earth layered structure?

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14What is the most scientific reason for velocity change in the mantle transition zone?

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15On what basis is the relation between liquid outer core and Earth magnetic field explained?

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16What is the main seismic basis for treating inner core as a layer different from outer core?

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17Which conclusion about density is correct in comparison of oceanic and continental crust?

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18Why is lithosphere thickness not uniform everywhere?

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19Why is it wrong to call asthenosphere only a liquid layer?

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20Why is arrival time analysed in the study of seismic waves?

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21What is one scientific basis for distinguishing lower mantle from upper mantle?

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22The idea of iron and nickel in the core is strengthened by which combined indication?

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23Gravity anomalies directly give what kind of internal information?

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24Why can crustal thickness be greater in mountainous regions?

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25Why do seismic waves bend?

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