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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.

Hard · Level 4 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. Internal heat and magmatic activity are more effective
  2. The region is entirely inner core
  3. There is no geothermal effect
  4. There is only atmospheric cooling
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  1. Seismic velocity changes shadow zones and density anomalies
  2. Only daily weather and rainfall
  3. Only vegetation and soil colour
  4. Only river length and width
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  1. Average density increases from crust to core
  2. Seasons change on Earth
  3. Rivers meet the sea
  4. Clouds change shape
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  1. Its thickness is much less than mantle
  2. It is hidden inside core
  3. It is only gas
  4. It is outside Earth
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  1. Outer core liquid metallic and inner core solid metallic
  2. Outer core granitic and inner core SIAL
  3. Outer core gas and inner core water
  4. Both parts of continental crust
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  1. Rigid solid medium
  2. Liquid medium
  3. Gaseous medium
  4. Vacuum
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  1. Asthenosphere is weak flowing base below rigid lithosphere
  2. Lithosphere is inside liquid outer core
  3. Asthenosphere does not exist outside inner core
  4. Both are atmospheric layers
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  1. When a wave partly returns after meeting a layer with different properties
  2. When rain falls on surface
  3. When tide occurs in ocean
  4. When clouds form
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  1. Bending of wave path when medium changes
  2. Wave changing into plant
  3. Wave becoming rainfall
  4. Wave becoming sea salt
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  1. Due to density difference heavy materials stayed below and light above
  2. Due to rainfall iron floated at surface
  3. Due to wind nickel came into crust
  4. Due to river core became granite
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  1. It is basaltic and mafic
  2. It is granitic and light
  3. It is liquid nickel
  4. It is atmospheric gas
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  1. Granitic light composition
  2. Liquid iron composition
  3. Only basaltic very dense composition
  4. Gaseous composition
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  1. In the context of mechanical classification
  2. Only in atmospheric weather context
  3. In context of ocean salinity
  4. In context of river deposition
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  1. Because mechanical behaviour also affects plate movement and waves
  2. Because chemical materials do not exist in Earth
  3. Because mechanical layers create weather
  4. Because core is part of atmosphere
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  1. Motion of liquid metallic outer core links with geomagnetic field
  2. Soil of solid crust alone makes entire magnetic field
  3. Ocean water creates nickel
  4. Atmosphere makes lithosphere magnetic
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  1. When seismic gravity magnetic and direct sample evidences agree
  2. When only one surface colour is observed
  3. When only weather forecast is available
  4. When only river name is known
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  1. Crust is the outermost layer
  2. Mantle is the thickest major layer
  3. Core is mainly linked with iron and nickel
  4. Mantle is completely atmospheric gas
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  1. P waves travel in solids liquids gases but S waves do not travel in liquids
  2. Both travel only in liquids
  3. Both travel only in air
  4. Both are not seismic waves
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  1. Elasticity and state of material also affect it
  2. Rainfall and clouds alone decide velocity
  3. Sea salt alone changes velocity
  4. River flow is the only reason
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  1. Heat flow shows energy from interior to surface and gradient shows temperature change with depth
  2. Both are only river deposits
  3. Heat flow is atmosphere and gradient is ocean
  4. Both have no relation with internal heat
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  1. Core or deep dense material
  2. Surface soil
  3. Atmospheric cloud
  4. River sand
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  1. All three generally increase
  2. All three decrease
  3. Temperature increases but pressure and density become zero
  4. Pressure decreases and temperature remains same
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  1. Moho Gutenberg Lehmann
  2. Lehmann Moho Gutenberg
  3. Gutenberg Lehmann Moho
  4. Moho Lehmann Gutenberg
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  1. It is wrong because motion of liquid metallic outer core is linked with geomagnetic field
  2. It is correct because magnetic field forms only from clouds
  3. It is correct because core has no metal
  4. It is wrong because outer core is atmosphere
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  1. Linking wave behaviour material composition density and heat evidence
  2. Memorising only one layer name
  3. Giving only a weather example
  4. Writing only river and mountain

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