World & Physical Geography MCQs
World Geography Multiple Choice Questions (MCQs) Quiz for State and UPSC Civil Services Examinations. Objective Questions on Physical Geography and World Geography for competitive examinations.
1. Geo centric model of solar system was proposed by:
[A] Copernicus
[B] Ptolemy
[C] Aristotle
[D] Strabo
Show Answer
Correct Answer: B [Ptolemy]
Notes:
Geo-centric theory of solar system was proposed by Ptolemy 2000 years ago. This theory states that all celestial objects, stars, the sun and the planets, all revolved around the earth.
2. When we go deep into the earth:
[A] Temperature decreases
[B] Temperature increases
[C] Temperature remains constant
[D] None of the above
Show Answer
Correct Answer: B [Temperature increases]
Notes:
During Volcano Molten lava erupted from the earth’s interior, support that temperature increases towards the centre of the earth. The temperature at the centre is estimated to lie somewhere between 3000°C and 50000C.
3. Which among the following is the major cause of nutation in Earth’s axis?
[A] Earth’s Oblate spheroid shape
[B] The difference between Land and Sea hemispheres
[C] Oceanic Currents
[D] Tidal Forces
Show Answer
Correct Answer: D [Tidal Forces]
Notes:
In the case of the Earth, the principal sources of tidal force are the Sun and Moon, which continuously change location relative to each other and thus cause nutation in Earth’s axis.
4. Which among the following is the major objective of NASA’s Kepler mission?
[A] To search for habitable planets
[B] To search for earth like planets
[C] To search for alien life
[D] To search for potentially dangerous objects in space
Show Answer
Correct Answer: B [To search for earth like planets]
Notes:
The Kepler Mission is specifically designed to survey the Milky Way galaxy to discover hundreds of Earth-size and smaller planets. It is to find out habitable zone and determine the fraction of the hundreds of billions of stars in our galaxy that might have such planets.
5. Which country’s territory comprises the largest part of the Anatolia or Asia Minor geographical region?
[A] Greece
[B] Egypt
[C] Turkey
[D] Cyprus
Show Answer
Correct Answer: C [Turkey]
Notes:
Anatolia, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the largest part of the territory of Turkey. Anatolia is bounded by the Black Sea to the north, the Mediterranean Sea to the south, the Aegean Sea to the west, and the borders of Armenia, Azerbaijan, and Iran to the east.
6. By which of the following process some stars which are of the size of Sun or smaller convert hydrogen to helium?
[A] Triple-alpha process
[B] Proton Proton Chain Reaction
[C] CNO Cycle
[D] R process
Show Answer
Correct Answer: B [Proton Proton Chain Reaction]
Notes:
The correct answer is the Proton Proton Chain Reaction. This process occurs in stars like the Sun, where hydrogen nuclei (protons) fuse to form helium, releasing energy. It is the dominant energy production mechanism in stars with masses similar to or smaller than the Sun. The CNO cycle, on the other hand, is more prevalent in larger stars. The proton-proton chain reaction is responsible for about 99% of the Sun’s energy output.
7. The “Ninety East Ridge” is a submarine volcanic ridge located in __?
[A] Pacific Ocean
[B] Atlantic Ocean
[C] Indian Ocean
[D] Arctic Ocean
Show Answer
Correct Answer: C [Indian Ocean]
Notes:
The Ninety East Ridge is an 5500 km long, north-south-oriented, submarine volcanic ridge in the eastern Indian Ocean that formed from magmatism associated with the deep seated Kerguelen mantle plume as the Indian plate drifted rapidly northward during the Late Cretaceous.
8. Which of the following correctly defines a Tidal flat?
[A] a submerged lagoon bed that only emerge at low tide
[B] an artificial water body that is subject to ebb and flow of tides
[C] an area along a coast where a river empties into an ocean or sea
[D] an equatorial region where tidal range is lowest
Show Answer
Correct Answer: A [a submerged lagoon bed that only emerge at low tide]
Notes:
First option is the correct answer. Tidal flat is a lagoon bed that only emerge at low tide, and hence is not suitable for colonisation by pioneer plants.
9. Adams, Leverrier, Galle and Lassell are some of the rings of which planet?
[A] Saturn
[B] Uranus
[C] Neptune
[D] Jupiter
Show Answer
Correct Answer: C [Neptune]
Notes:
Neptune has five rings: Galle, LeVerrier, Lassell, Arago, and Adams. Its rings were named after the astronomers who made an important discovery regarding the planet.
10. The evidence for the rotation of stars comes mainly from the which of the following effects? (UPSC Prelims 1990)
[A] Doppler effect
[B] Photoelectric effect
[C] Stark effect
[D] Zeeman effect
Show Answer
Correct Answer: D [Zeeman effect]
Notes:
The evidence for the rotation of stars comes mainly from the Zeeman effect. The Zeeman effect, named after the Dutch physicist Pieter Zeeman, is the effect of splitting of a spectral line into several components in the presence of a static magnetic field. It is analogous to the Stark effect, the splitting of a spectral line into several components in the presence of an electric field.
