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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.

Medium · Level 2 · 25 questions

Practice questions

01Why is it wrong to consider the mantle completely liquid?

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02Lehmann discontinuity is related to which boundary?

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03Which observation provides evidence for layered structure inside Earth?

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04Which pair correctly shows a layer and its general composition?

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05Which named seismic discontinuity is located at the greatest depth inside the Earth?

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06What is the most direct effect of increasing heavy elements from crust to core?

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07Why are P waves and S waves studied together in seismic studies?

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08Which statement correctly explains the relation between outer core and Earth's magnetic field?

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09Continental crust being thicker on average than oceanic crust supports which idea?

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10In which situation is disappearance of an S wave most expected?

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11Why are meteorites considered an indirect source in studying Earth layers?

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12Which statement about the crust is more correct?

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13Convection currents in the mantle are linked with what?

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14Which option is not a direct source of Earth's internal structure?

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15If a rock composition is granitic and relatively less dense it is more likely linked with what?

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16If a rocky layer is basaltic and denser it is generally linked with what?

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17What is the main mechanical difference between lithosphere and asthenosphere?

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18Dominance of iron and nickel in the core helps explain which property of Earth?

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19Why are gravity anomalies useful while studying Earth's interior?

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20What information about Earth's interior can magnetic studies provide?

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21Which statement correctly describes a feature of P waves?

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22Which statement correctly describes a feature of S waves?

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23Refraction of seismic waves inside Earth indicates what?

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24If a boundary inside Earth partially reflects waves what may it indicate?

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25What is the most balanced method to understand Earth's internal structure?

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