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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 3 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. Seismic waves move at the same speed
  2. Seismic waves bend and their speed changes
  3. Wind direction changes at surface
  4. Sea waves become high
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  1. It contains more basaltic material
  2. It contains more granite
  3. It contains only water
  4. It has more air spaces
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  1. Moho outer core and inner core
  2. Gutenberg crust and mantle
  3. Lehmann crust and ocean
  4. Moho crust and mantle
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  1. Surface direct evidence
  2. Seismic indirect evidence
  3. Climatic evidence
  4. Vegetation evidence
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  1. High temperature makes it gas
  2. Very high pressure prevents melting
  3. It is made only of light minerals
  4. There is no metal there
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  1. Heavy elements are more concentrated at depth
  2. Sunlight is stronger at surface
  3. Oceans have more salinity
  4. Atmospheric weight is low
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  1. Chemical classification is based on material and mechanical classification on physical behaviour
  2. Both are based only on weather
  3. Chemical classification is based on plates and mechanical on rainfall
  4. Both tell only ocean depth
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  1. It indicates change of medium from mantle to core
  2. It tells atmospheric height
  3. It measures ocean salinity
  4. It decides river direction
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  1. It is the liquid outer core
  2. It is the rigid outer part including crust and part of upper mantle
  3. It is made only of atmospheric gases
  4. It lies below inner core
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  1. It is rigid and immovable
  2. It behaves weakly and semi-flowingly
  3. It is completely gas
  4. It is only part of outer core
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  1. When information across a liquid layer is needed
  2. When only shear in liquid is to be measured
  3. When surface wind is to be measured
  4. When ocean tides are to be counted
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  1. It is generally thick light and granitic
  2. It is always thin dense and basaltic
  3. It is a liquid part of nickel and iron
  4. It lies at Earth's centre
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  1. Thick light and granitic
  2. Thin dense and basaltic
  3. Made of liquid iron
  4. Gaseous and unstable
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  1. Internal division of continental crust
  2. Boundary of outer and inner core
  3. Boundary of atmosphere and space
  4. Boundary of ocean and cloud
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  1. Due to extreme depth temperature and pressure
  2. Because Earth has no layers
  3. Because seismic waves do not exist
  4. Because surface is fully liquid
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  1. They help compare early Earth like materials
  2. They come directly from mantle
  3. They are liquid samples of outer core
  4. They are frozen salts from oceans
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  1. Isostatic balance and mountain roots
  2. Ocean salinity
  3. Atmospheric ozone
  4. Rate of river erosion
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  1. S waves do not pass through outer core and wave behaviour changes at inner boundary
  2. Rivers originate from mountains
  3. Forests receive more rainfall
  4. Oceans contain salt
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  1. Core mantle crust
  2. Crust mantle core
  3. Mantle core crust
  4. Crust core mantle
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  1. It marks the boundary between outer core and inner core
  2. It forms soil on crust surface
  3. It tells ocean wave height
  4. It lowers atmospheric temperature
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  1. It is a completely liquid ocean
  2. It is a solid rocky layer that can behave plastically over long time
  3. It is only a zone of gases
  4. It is a layer outside Earth
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  1. Seismic waves and gravity anomalies
  2. Mine samples drilling samples and volcanic materials
  3. Meteorites and magnetic studies
  4. Shadow zones and refraction
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  1. Drilling sample and mine rock
  2. Volcanic lava and surface soil
  3. Seismic waves gravity studies and magnetic studies
  4. River pebbles and sea sand
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  1. SIAL is mainly linked with continental crust
  2. SIAL is liquid part of core
  3. SIAL is only in outer core
  4. Nickel is dominant in SIAL
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  1. SIMA is linked with oceanic basaltic and denser layer
  2. SIMA is another name of inner core
  3. SIMA is upper layer of atmosphere
  4. SIMA is found only in glaciers

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