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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 5 · 25 questions

Practice questions

01The lower mantle is a part of which major layer of Earth?

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02The interior structure of the Earth is mainly studied on the basis of what?

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03Which is the outermost solid layer of the Earth?

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04Which major layer of the Earth is considered the thickest?

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05What is the boundary between the crust and the mantle called?

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06What is the boundary between the mantle and the core called?

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07Which boundary lies between the outer core and the inner core?

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08Which materials are mainly found in the continental crust?

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09The oceanic crust is generally known by which name?

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10Which elements are mainly found in the Earth's core?

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11What is the rigid outer layer including the crust and part of the upper mantle called?

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12What is the relatively soft layer below the lithosphere called?

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13How is the thickness of continental crust compared to oceanic crust?

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14How is the density of oceanic crust compared to continental crust?

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15What generally happens to temperature as depth increases inside the Earth?

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16What generally happens to pressure as depth increases inside the Earth?

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17How does density generally change with depth in Earth's internal layers?

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18Through which type of medium can seismic P waves pass?

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19Through which medium do seismic S waves not pass?

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20Which is an important evidence that the outer core is liquid?

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21The average density of the crust is lower than which layer?

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22What is the approximate radius of the Earth?

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23The mantle extends approximately up to what depth?

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24The core extends from about what depth to the Earth's centre?

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25What are the three main layers in the Earth's internal structure?

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