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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.

Easy · Level 2 · 25 questions

Practice questions

01The term sial is mainly used for which layer?

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02The term sima is mainly related to which part?

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03What is generally believed about rocks of the mantle?

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04How are Earths layers generally divided based on chemical composition?

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05Based on physical properties, what is the upper rigid part of Earth called?

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06What type of material is the asthenosphere believed to have?

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07Which statement is correct for the outer core?

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08Which statement is correct for the inner core?

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09What does change in velocity of seismic waves indicate?

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10Direct information about Earths interior is mostly limited to which region?

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11How is the density of Earths core generally?

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12Which is the thinnest major layer of Earth?

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13Why are meteorites considered useful in understanding Earths interior?

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14The combined rigid part of mantle and crust is known as what?

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15A sharp change in seismic-wave velocity at the boundary between the crust and mantle is known as which discontinuity?

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16Which layer is considered related to Earths magnetic field?

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17Convection currents in the mantle are considered related to which process?

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18Which elements are generally abundant in Earths crust?

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19What does discontinuity mean in identifying Earths internal layers?

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20Why is oceanic crust considered denser than continental crust?

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21Which sequence correctly represents the major layers of the Earth from the surface toward the centre?

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22In which layer does the absence of S waves indicate its liquid nature?

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23In studying Earths interior, gravity and magnetic measurements are what type of sources?

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24Which is the most correct order in the context of Earths internal structure?

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25What do scientists mainly analyze to understand Earths internal structure?

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