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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.

Medium · Level 6 · 25 questions

Practice questions

01Reflection of seismic waves helps in identifying what?

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02Study of ocean floor rocks gives direct evidence up to which extent?

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03Why is volcanic material not considered evidence of every deep layer?

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04Why is evidence from mining considered incomplete for the deep interior?

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05Why are artificial seismic waves used?

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06If both magnetic and gravity anomalies are found what will scientists do?

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07Which combination is most useful to understand metallic and liquid properties of the core?

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08Which source can most directly test chemical composition of the crust?

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09If a source has real sample but very limited depth how should it be evaluated?

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10In which type of question is comparison of direct and indirect sources most necessary?

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11What is the main advantage of a seismic station network?

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12In which situation can P wave velocity decrease and what would it mean?

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13If a seismic wave returns from a boundary what process is it an example of?

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14Which option has an incorrect match of source and information?

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15Which option correctly matches source and limitation?

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16Which statement is scientifically most correct?

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17If a student writes meteorite as a mine sample what is the correction?

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18In which situation will study of seismic waves be more useful than mining?

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19Which comparison is most useful in knowing the state of internal materials?

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20Which source can provide temperature and rock information together?

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21If a source gives only clues what should be done before making final conclusion?

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22Which option correctly relates method and purpose?

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23Why is the study of Earth's interior considered challenging?

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24Which sequence is most correct for scientific study of Earth's interior?

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25How does sheet wash develop into rills on a slope?

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Answer and explanation

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