GATE GG-1 topic:earth-and-planetary-science PYQs & Answers — Page 4

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topic:earth-and-planetary-science

Questions 31–40 of 48. Imported answers require independent review unless marked reviewed.

Topic practice 48 questionsPage 4 of 5

Which one of the following statements about the planetary motion of the Solar system is INCORRECT?

Your answerChoose one option.

The orbital-radius of planets sweep out equal areas in equal intervals of time.

The orbital speed of planets is constant throughout their respective orbits.

Planets revolve in anticlockwise direction relative to a point above the plane of planetary motion.

At least one focus of the elliptical orbit of each planet lies at the same point.

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Choose the CORRECT combination for the following two statements

Statement-I: The correct order of magnetic chrons from the oldest to the youngest is Gilbert-Gauss-Muyama-and Brunhes.

Statement -II: Magnetic chrons Gilbert and Matuyama are reverse whereas Gauss and Bruhnes are normal.

Your answerChoose one option.

Both statements I and II are correct

Both statements I and II are incorrect.

Statement I is correct and statement II is incorrect.

Statement I is incorrect and statement II is correct.

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Body waves ______.

Your answerChoose one option.

can travel through vacuum

have cylindrical wavefronts

are mechanical waves

are known as ground roll

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The acceleration due to gravity (g) begins to fall sharply towards the centre of the Earth from the ______ discontinuity.

Your answerChoose one option.

Conrad

Mohorovicic

Gutenberg

Lehmann

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Isodynamic contours of the geomagnetic field represent lines of equal ______.

Your answerChoose one option.

inclination

declination

total field intensity

magnetic potential

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Assuming Airy isostatic compensation, the depth to the Moho from a point located 2 km above the mean sea level is ______ km. (round off to 1 decimal place). (The depth of compensation T for the crust at mean sea level is 30 km, the density of crust and upper mantle are 2.67 gm/cc and 3.30 gm/cc, respectively).

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The speed of revolution of the Earth around the Sun is

Your answerChoose one option.

maximum at Perihelion.

minimum at Perihelion.

maximum at Aphelion.

equal at Aphelion and Perihelion.

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The geoid can be best defined as

Your answerChoose one option.

an oblate spheroid that best approximates the shape of the earth.

a surface over which the value of gravity is constant.

the physical surface of the earth.

an equipotential surface of gravity of the earth.

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For a layered isotropic medium with a flat horizontal free surface, match the wave types listed in Group-I with their corresponding polarizations listed in Group II.

Group-I

P. P-waves Q. S-waves R. Rayleigh waves S. Love waves

Group-II

Particle motion is transverse to the direction of wave propagation.

Particle motion is transverse to the direction of wave propagation and is confined to the horizontal plane.

Particle motion is parallel to the direction of wave propagation.

Particle motion is elliptical.

Your answerChoose one option.

P-1; Q-3; R-4; S-2

P-3; Q-1; R-4; S-2

P-3; Q-1; R-2; S-4

P-2; Q-3; R-1; S-4

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The magnitudes of the total geomagnetic field at the equator and pole are denoted by B_E and B_P, respectively. Which one of the following is TRUE?

Your answerChoose one option.

B_P ≈ 4 B_E

B_P ≈ 2 B_E

B_P ≈ B_E

B_P ≈ 1/2 B_E

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GATE GG-1 topic:earth-and-planetary-science PYQs

Question 2

Question 3

Question 4

Question 5

Question 19

Question 21

Question 4

Question 15

Question 16

Question 22