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Geography

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In Class 11 Geography, this topic introduces how scientists investigate the Earth’s interior, which cannot be observed directly. Students distinguish direct evidence from mines, deep drilling and volcanic materials, and indirect evidence from seismic waves, meteorites, gravity, magnetic fields, and variations in temperature and pressure. The topic explains how these sources help infer the Earth’s internal structure and composition within the chapter Interior of the Earth.

Hard · Level 2 · 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. Mainly up to structure of oceanic crust
  2. Directly to the entire core
  3. To the whole atmosphere
  4. To population distribution
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  1. One is related to heat observation and the other to heat source
  2. Both are related only to rivers
  3. Both are measures of population
  4. Both are weather instruments
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  1. There is a clear change in nature of medium
  2. There is no layer there
  3. P wave tells weather
  4. Study of waves is useless
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  1. They pass through Earth's interior
  2. They form only in oceans
  3. They measure wind direction
  4. They increase crop production
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  1. They give real samples but do not reach great depths
  2. They give no samples
  3. They always tell only weather
  4. They are unrelated to Earth
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  1. Which wave passes through which medium
  2. How much rainfall occurred
  3. How many towns exist
  4. How many languages are spoken
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  1. To understand internal paths and distances of layers
  2. To remember names of rivers
  3. To fix crop price
  4. To count raindrops
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  1. Minerals and elements can be tested in laboratory
  2. It creates seismic shadow zone
  3. It measures rainfall
  4. It tells population
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  1. Indirect evidence
  2. Direct sample
  3. Agricultural source
  4. Climate record
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  1. When full state and structure of core must be decided
  2. When metallic clue is needed
  3. When magnetic anomaly is to be identified
  4. When indirect clue is needed
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  1. They will analyse wave paths and internal media
  2. They will treat it as weather record
  3. They will call it crop report
  4. They will leave the data as unrelated
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  1. Identify sources compare evidence draw conclusion
  2. Conclusion first evidence later
  3. Decide core by weather
  4. Write final truth from one clue
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  1. Direct clues from volcanic materials
  2. Indirect seismic waves
  3. Gravity anomalies
  4. Weather sources
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  1. Analysis of velocity path reflection and refraction of seismic waves
  2. Analysis of crop production and market
  3. Analysis of rainfall and population
  4. Analysis of river names and town list
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  1. They pass through deep parts and indicate structure
  2. They directly extract rock from centre
  3. They tell only surface soil
  4. They control weather
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  1. They give comparative clues but did not come directly from Earth's interior
  2. They are always found in mines
  3. They are formed from seismic waves
  4. They are rainfall records
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  1. Possibility of denser material in the core
  2. Core is completely empty
  3. Core is made only of water
  4. Density of core is zero
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  1. When information of deep mantle and core is needed
  2. When colour of surface rock is to be seen
  3. When mine sample is sufficient
  4. When only local soil is to be tested
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  1. Mining gives crustal information and seismic waves give clues of deep layers
  2. Core is known only from rainfall
  3. Every source gives direct core sample
  4. Indirect sources are useless
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  1. S waves failing to pass through the liquid outer core
  2. Heavy rainfall causing the P-wave shadow zone
  3. Population growth causing the Moho discontinuity
  4. Crop cultivation causing global gravity anomalies
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  1. Seismograph is an instrument and seismogram is its wave record
  2. Seismogram is instrument and seismograph is record
  3. Both are rain gauges
  4. Both are rock samples
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  1. Every source has its own limitation and type of information
  2. A single source provides a direct image of all Earth's layers
  3. Internal structure is determined only from weather data
  4. Scientific study of Earth's interior is not possible
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  1. Combined analysis of direct samples indirect waves gravity and magnetic clues
  2. Depending only on mines
  3. Reading only weather records
  4. Looking only at political maps
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  1. They will compare both evidences and carefully infer the possible structure
  2. They will treat only gravity clue as final truth
  3. They will accept only seismic velocity without checking
  4. They will reject both as weather sources
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  1. When the sample is only from crust but conclusion is extended to the core
  2. When the sample is used to understand crustal mineral composition
  3. When the sample is tested in a laboratory
  4. When the sample is used to identify local rock type

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