Geology and Geophysics
GATE GG-1 Earth and planetary system PYQs
Build your understanding with focused practice from past exam papers.
How to practice Earth and planetary system
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 48. Imported answers require independent review unless marked reviewed.
Question 12
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In which one of the following layers inside the Earth, the velocity of the P-wave exceeds 13 km/s?
Your answerChoose one option.
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If
and
, respectively, denote the equatorial and polar radii of a reference ellipsoid, then the radius,
, of its equivalent sphere is given byYour answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 24
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If the diameter of a scaled-down model of the Earth is 45 cm, then the equivalent length on the surface of the Earth for 1 cm on the model is __________ km (rounded off to two decimal places).
[Use: Radius of the Earth = 6371 km]
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Consider that the upper continental crust is 10 km thick and made up of granitic rock having density of 2800 kg/m³. The surface heat flow due to radiogenic heat from the granitic rock having heat production value of 10⁻⁹ W/kg is____________ mW/m² (answer in integer).
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 11
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The most volcanically active body in our Solar System is
Your answerChoose one option.
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The ratio of P-wave to S-wave velocities,
, within the Earth depends onYour answerSelect all correct options. You can choose more than one.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 23
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Which of the following statements is/are correct regarding the magnetic field lines of the Earth, at the magnetic poles and the magnetic equator?
Your answerSelect all correct options. You can choose more than one.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 11
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The Earth’s magnetic field originates from convection in which one of the following layers?
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 18
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The given figure shows the ray path of a P-wave propagating through the Earth. Choose the CORRECT P-phase corresponding to the ray path.
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 24
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Assume heat producing elements are uniformly distributed within a 16 km thick layer in the crust in a heat flow province. Given that the surface heat flow and reduced heat flow are 54 mW/m² and 22 mW/m², respectively, the radiogenic heat production in the given crustal layer in µW/m³ is ____________ (in integer).
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