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Subjects

Geography

Sources of information

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 6 · 25 questions

Practice questions

01If both seismic velocity and density clues are high what possible conclusion is suitable?

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02What are different roles of S waves and magnetic field in core study?

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03Which scientific step gives a better conclusion despite conflicting indirect clues?

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04If velocity change and reflection occur together at a seismic boundary what may it mean?

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05How should volcanic bombs ash and gases be best understood as sources?

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06Which statement is correct to clear confusion between seismograph and seismogram?

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07Why is depending on a single source risky in studying Earth's interior?

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08Which option has an incorrect match of method and purpose?

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09If a question asks the limitation of direct sources what is the most suitable answer?

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10Why is it logical to link seismic wave travel time with distance of layers?

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11In which situation will rock sample be more useful than seismic source?

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12If S waves stop but P waves bend what combination does it indicate?

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13If a source gives real sample but its representation is local how should the conclusion be written?

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14Which statement shows the greatest usefulness of seismic sources?

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15Why should geothermal gradient be understood differently from surface temperature?

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16In which situation is it essential to use both direct and indirect evidence together?

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17Which option gives the most correct source and scope?

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18Why are seismic evidences also not treated alone as final truth?

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19If magnetic field gives metallic clue and S wave is absent what combination is suitable for the core?

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20What is the correct difference in nature of evidence between meteorite and rock sample?

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21If velocity change is seen at Moho and S wave blockage at core which conclusion is correct?

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22Which is the most balanced final statement about sources of Earth's interior?

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23If lava and seismic waves provide information from different depths what is the most scientific interpretation?

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24If gravity value is low but P wave velocity is high in an area what caution is needed while drawing conclusion?

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25Why should chemical information from crust samples and metallic nature of the core be studied separately?

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