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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 2 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. Mantle is mostly solid but can behave flowingly over long time
  2. Mantle is completely gaseous
  3. Mantle is made only of water
  4. Mantle is located outside Earth
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  1. Crust and mantle
  2. Mantle and outer core
  3. Outer core and inner core
  4. Ocean and atmosphere
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  1. Seismic wave speed changes at different depths
  2. Trees on surface have equal height
  3. Sea colour is always blue
  4. Clouds change shape
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  1. Continental crust granitic
  2. Oceanic crust NIFE
  3. Inner core SIAL
  4. Outer core granitic
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  1. Moho discontinuity
  2. Repetti discontinuity
  3. Gutenberg discontinuity
  4. Lehmann discontinuity
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  1. Average density increases
  2. Atmosphere becomes thicker
  3. Ocean salinity decreases
  4. River flow becomes faster
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  1. Their behaviours help identify solid and liquid parts
  2. Both tell only weather
  3. Both are sea waves
  4. Both are light rays
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  1. Motion of liquid metallic outer core is linked with magnetic field
  2. Sand of solid crust alone creates magnetic field
  3. Atmospheric clouds make core magnetic
  4. Ocean water itself is Earth's magnet
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  1. Lighter and thicker roots may exist below continents
  2. Oceans exist outside crust
  3. Core floats on continents
  4. Mantle exists only below oceans
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  1. The wave enters a liquid layer
  2. The wave enters a solid granite layer
  3. The wave enters a hard basalt layer
  4. The wave travels through the solid upper mantle
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  1. They indicate early solar system and Earth like materials
  2. They are samples directly from inner core
  3. They are ocean sediments
  4. They are atmospheric water
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  1. It is a thin outer solid layer whose thickness varies by location
  2. It is the thickest layer of whole Earth
  3. It is always in liquid state
  4. It is made only of nickel and iron
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  1. Internal heat and slow flow of material
  2. Formation of clouds on surface
  3. Migration of marine fish
  4. Atmospheric sound
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  1. Rock obtained from mining
  2. Sample obtained from drilling
  3. Volcanic material
  4. Analysis of seismic waves
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  1. Continental crust
  2. Outer core
  3. Inner core
  4. Liquid nickel layer
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  1. Oceanic crust
  2. Continental SIAL
  3. Inner core
  4. Atmospheric layer
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  1. Lithosphere is rigid while asthenosphere is weak and flowing
  2. Both are completely liquid
  3. Lithosphere is gas and asthenosphere is ice
  4. Both are found only in core
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  1. High density and magnetic properties
  2. River erosion on surface
  3. Acidity of rainfall
  4. Ocean salinity
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  1. They indicate density differences inside
  2. They tell daily temperature
  3. They measure wind speed
  4. They decide sea colour
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  1. Clues about metallic materials and nature of core
  2. Direct amount of rainfall
  3. Only surface soil moisture
  4. Length of river
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  1. They travel as compression and rarefaction
  2. They travel only in liquids
  3. They never emerge from Earth surface
  4. They are always slower than S waves
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  1. They are shear waves and do not travel in liquids
  2. They are fastest waves and travel in gases
  3. They travel only on ocean surface
  4. They are a type of light wave
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  1. Difference in properties of media
  2. Amount of atmospheric oxygen
  3. Direction of surface river
  4. Age of vegetation
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  1. Boundary between two different layers
  2. Day and night on surface
  3. Tide in ocean
  4. Spread of forests
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  1. Studying direct samples and indirect seismic evidence together
  2. Drawing conclusions only from surface soil
  3. Deciding layers only by weather
  4. Measuring only sea waves

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