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UPSC > Physical Geography

Explore popular questions from Physical Geography for UPSC. This collection covers Physical Geography previous year UPSC questions hand picked by experienced teachers.

Q 1.

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Gutenburg discontinuity is found between the:

A

Crust and mantle

Mantle and Core

C

Upper core and Lower Core

D

Upper mantle and lower mantle

Q 2.

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Which one of the following percentages of distance from earth surface is correct for perigee' of Moon than 'apogee'?

A

2%

B

5%

C

8%

12%

Q 3.

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In order of their distances from the Sun. which of the following planets lie between Mars and Uranus?

A

Earth and Jupiter

Jupiter and Saturn

C

Saturn and Earth

D

Saturn and Neptune

Explanation

Jupiter and Saturn arc located between Mars and Uranus.

Q 4.

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Which one of the following statements is correct with reference to our solar system?

The earth is the densest of all the planets in our solar system

B

The predominant element in the composition of earth is silicon

C

The sun contains 75 percent of the mass of the solar system

D

The diameter of the sun is 190 times that of the earth

Explanation

The earth is the densest of all the planet. Density of Earth is 5.52. Venus-5.50. Mercury 5.27, Mars -3.95. Jupiter and Saturn - 0.69. Uranus - 11.70.

Q 5.

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In the earth's direction of rotation is reversed, what should be the IST when it is noon at the International Date Line?

06.30 hrs

B

05.30 hrs

C

18.30 hrs

D

17.30 hrs

Explanation

India is a large country spanning over 30° of longitude. It is unusual in having a single time zone all over the country , 5 1/2 hours fast. If the direction of rotation of earth is reversed then Indian Standard Time will be - 51/2 hr. When it is noon the time is 12:00; that will be 6:30 AM.in place of 17:30 P.M. or 5:30 P.M.

Q 6.

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If we studied space for a year, we would see different stars every.

A

Year

B

Month

Season

D

Week

Q 7.

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Diamond ring is a phenomenon observed:

A

at the start of a total solar eclipse

B

at the end of a total solar eclipse

only along the peripheral regions of the totality trail

D

only in the central regions of the totality trail

Explanation

Diamond ring is observed during solar eclipse, only along the peripheral regions of the totality trail.

Q 8.

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An instrument to measure the amount of brightness of sunshine received at a point on Earth's surface is

A

Sun-dial

B

Sunshine recorder

Campbell - Stoke's recorder

D

All of the above

Q 9.

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What can be the maximum duration of totality for a solar eclipse?

A

12.5 minutes

7 minutes 40 seconds

C

1 hour 42 minutes

D

There is no maximum duration

Q 10.

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Which of the following statements with regard to the term 'great circle' is not correct ?

A

Equator is a great circle.

B

A ship can save fuel and time by following the great circle arc between two points.

Only one great circle can be drawn on a sphere.

D

A great circle results when a plane passes through the centre of a sphere.

Q 11.

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The sidereal month may be defined as

A

the period in which the moon completes an orbit around the Earth.

the period in which the moon completes an orbit around the Earth and returns to the same position in the sky.

C

the period of rotation of moon

D

None of these

Q 12.

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Magma that is more granitic tends to be very explosive because

of relatively higher water content

B

of relatively higher gases content

C

of relatively lower water content

D

of relatively lower gases content

Q 13.

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One Astronomical Unit is the average distance between

Earth and the Sun

B

Earth and the Moon

C

Jupiter and the Sun

D

Pluto and the Sun

Q 14.

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We always see the same face of the moon because

A

it is smaller than the earth.

B

it revolves on its axis in a direction opposite to that of the earth.

it takes equal time for both revolution around the earth and rotation on its own axis.

D

it rotates at the same speed as the earth around the sun.

Q 15.

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The theory suggesting that the continents of South America and Africa were once joined together was the

continental drift theory

B

tetrahedral theory

C

Kant's theory

D

Ritter's theory

Q 16.

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When it is 12 Noon at Allahabad, the time at Wellington (New Zealand) would be Cose to which one of the following?

A

4:30 pm of the same day

B

4:30 pm of the previous day

6:30 pm of the same day

D

6:30 pm of the previous day

Q 17.

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Beirut time is two hours ahead and Lima time is live hours behind GMT. The longitudes of Beirut and Lima are respectively:

75° West and 30° East

B

70° East and 35° West

C

30° East and 75° West

D

35° West and 70° East

Explanation

Beirut is in the east of G..M.T. and Lima is live hours behind the G.M.T. We know that 1° is equal to four minutes i.e.. 2 hours = 30° East and Beirut is 75° West of G.M.T.

Q 18.

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Which one of the following is the time required for the earth to return to a given point in its orbit with reference to fixed stars called?

A

Lunar year

B

Solar year

C

Tropical year

Sidereal year

Q 19.

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Which one of the following pairs is not correctly matched?

A

June Midday Sun overhead at Tropic of Cancer

B

December Midday Sun overhead at Tropic of Capricorn

C

March Midday Sun overhead on Equator

September Midday Sun overhead at Arctic Circle

Explanation

The parallel at which the sun is overhead at midday is show n in the following diagram ;

Q 20.

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The colour of the star is an indication of its

A

Distance from the earth

B

Distance from the sun

Temperature

D

Luminosity

Explanation

The colour of the star Ls an indication of its temperature. Tbe glowing is caused by something called Black-Body radiation, which has to do with the heat energy trying to radiate away in more and more energetic wavelengths. Red stars are relatively cool at only a few thousand degrees Celsius, white stars arc hot at about ten thousand degrees, and blue stars are the hottest.

Q 21.

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Which one of the following is the largest satellite in solar system?

Ganymede

B

Titan

C

Europa

D

Triton

Explanation

Ganymede is the largest satellite in solar system. Ganymede is a satellite of Jupiter and the largest moon in the Solar System. It is the seventh moon and third Galilean satellite outward from Jupiter. Completing an orbit in roughly seven days, Ganymede participates in a 1:2:4 orbital resonance with the moons Europa and Io, respectively. It has a diameter of 5,268 km (3,273 mi), 8% larger than that of the planet Mercury, but has only 45% of the latter's mass.

Q 22.

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The distance of Moon from the Earth is

384 thousand kms.

B

300 thousand kms.

C

350 thousand kms.

D

446 thousand kms.

Explanation

The distance of moon from the Earth is 384 thousands kms. The Moon is the only natural satellite of the Earth and the fifth largest moon in the Solar System. It is the largest natural satellite of a planet in the Solar System relative to the size of its primary, having 27% the diameter and 60% the density of Earth, resulting in 1/81 its mass.

Q 23.

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What is the time taken by the Earth to complete one rotation on its axis?

A

23 hr 52 min 4 sec

23 hr 56 min 4 sec

C

24 hr 53 min 2 sec

D

24 hr 12 min 6 sec

Explanation

The time taken by the Earth to complete one rotation on its axis is 23 hr-56 min 4 sec.

Q 24.

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During the Venus transit, the planet appeared as a tiny black circle moving on the Sun. The black colour on the Sun is because the planet:

A

Obstructed all light from the Sun.

B

Is black in colour.

C

Was invisible due to bright rays from the Sun.

Behaved as a black hole during its transit.

Q 25.

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Space between Earth and Moon is known as

Cislunar

B

Fulalunar

C

Nebula

D

None of these

Explanation

Space between Earth and Moon is known as Cislunar. Pertaining to the space between the earth and the orbit of the moon.