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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.

Medium · Level 5 · 25 questions

TOPIC PRACTICE

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Up to 25 questions from this page. Select your focus, then start.

25 questions

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  1. The wave entered the ocean
  2. The wave reached more rigid mantle material
  3. The wave moved into atmosphere
  4. The wave stopped
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  1. S wave passes through that layer
  2. P wave completely disappears
  3. S wave cannot move through that layer
  4. Surface wave becomes fastest
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  1. Heavy materials moved toward core and lighter materials toward crust
  2. All materials settled equally at surface
  3. Crust became entirely iron
  4. Core became entirely silica
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  1. Outer core rigid plate
  2. Lithosphere weak flowing layer
  3. Asthenosphere solid centre
  4. Lithosphere rigid plate part
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  1. Continental crust
  2. Outer core
  3. Inner core
  4. Liquid NIFE
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  1. It is lighter
  2. It is denser
  3. It is gaseous
  4. It is made only of soil
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  1. Temperature decrease with altitude
  2. Rainfall change with latitude
  3. Temperature increase with depth
  4. Cooling of sea water
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  1. Absence of S waves and link with magnetic field
  2. Colour of surface soil
  3. Acidity of rainfall
  4. Depth of river
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  1. Moho about 5100 kilometres
  2. Gutenberg about 2900 kilometres
  3. Lehmann about 35 kilometres
  4. Conrad about 6371 kilometres
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  1. Low density materials
  2. High density materials
  3. Only surface dust
  4. Atmospheric clouds
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  1. Drilling reaches only limited depth
  2. Drilling directly reaches inner core
  3. Drilling gives samples of all layers
  4. Drilling creates seismic waves
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  1. Due to low pressure and extreme cold
  2. Due to long term plastic behaviour under high heat and pressure
  3. Because it is made of gases
  4. Because it is ocean water
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  1. Volcanic material indirect source
  2. Seismic waves direct sample
  3. Meteorites comparative indirect source
  4. Mine rock magnetic indirect source
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  1. Soil of lithosphere
  2. Liquid outer core
  3. Oceanic sediment
  4. Continental crust
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  1. They travel only through liquids
  2. They are shear waves and travel only through solids
  3. They are longitudinal (compressional) waves and arrive first
  4. They travel only along the Earth's surface
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  1. They easily travel in liquids
  2. They are shear waves and do not travel in liquids
  3. They are faster than P waves
  4. They travel only in atmosphere
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  1. Both are gaseous
  2. Outer core is liquid and inner core is solid
  3. Both are parts of crust only
  4. Outer core is SIAL and inner core is SIMA
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  1. Part of the wave returns back
  2. Wave changes into rainfall
  3. Wave grows plants
  4. Wave becomes soil
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  1. River deposition
  2. Refraction of waves and stopping of some waves
  3. Growth of vegetation
  4. Condensation of clouds
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  1. Core — iron and nickel
  2. Crust — only nickel
  3. Mantle — only water
  4. Outer core — silica and alumina
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  1. Continental crust is thin and denser
  2. Oceanic crust is thick and lighter
  3. Continental crust is thick and less dense
  4. Both always have same composition
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  1. Properties of medium change with depth
  2. Rainfall occurs at surface
  3. Rivers change direction
  4. Air pressure becomes zero
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  1. They give information only from limited depth and limited material
  2. They give complete sample of whole core
  3. They are equally available in all layers
  4. They do not give indirect clues but tell weather
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  1. Moho crust and mantle
  2. Gutenberg mantle and core
  3. Lehmann outer and inner core
  4. Moho outer and inner core
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  1. Low internal heat
  2. Higher geothermal activity
  3. Atmospheric ozone
  4. More silt in river

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