1. At which among the following places, the aeration zone is located in Earth’s Lithosphere?
[A] Above earth surface
[B] Below earth surface & above Water Table
[C] Below Earth’s surface and parallel to water table
[D] Below earth’s surface and below water table
Show Answer
Correct Answer: B [Below earth surface & above Water Table]
Notes:
The zone of aeration is the region between the earth’s surface and the water table. The main components of this region are the soil and rocks.
2. How many times Sun is heavier than Earth?
[A] 3,300 times
[B] 33,000 times
[C] 3,30,000 times
[D] 33,30,000 times
Show Answer
Correct Answer: C [3,30,000 times]
Notes:
The sun lies at the heart of the solar system and it is the largest object. It holds 99.8 percent of the solar system’s mass and is roughly 109 times the diameter of the Earth. It is 3,30,000 times heavier than earth.
3. Sun is best kept in which among the following categories?
[A] Red Dwarf
[B] Yellow Dwarf
[C] Brown Dwarf
[D] Helium white dwarf
Show Answer
Correct Answer: B [Yellow Dwarf]
Notes:
Yellow dwarfs are stars of medium size. The sun is the yellow dwarf. A yellow dwarf is a star belonging to the main sequence of spectral type G and weighing between 0.7 and 1 times the solar mass. They have a surface temperature of about 6000 ° C and shine a bright yellow, almost white.
4. “Nebular Hypothesis” is a theory which is related to origin of the following?
[A] Sun
[B] Solar System
[C] Galaxy
[D] Universe
Show Answer
Correct Answer: B [Solar System]
Notes:
The nebular hypothesis is model which explain the formation and evolution of the Solar System. It suggests that the Solar System formed from gas and dust orbiting the Sun.
5. Sun shines exactly over equator for how many times a year?
[A] Once in a year
[B] twice in a year
[C] four times a year
[D] 12 times in a year
Show Answer
Correct Answer: B [twice in a year]
Notes:
The sunshines generally occur over the equator twice a year. During the summer equinox and autumn equinox.
6. Titan is the largest moon of _________?
[A] Uranus
[B] Jupiter
[C] Saturn
[D] Earth
Show Answer
Correct Answer: C [Saturn]
Notes:
Titan is the moon of Saturn. It is the largest moon of Saturn and the second largest natural satellite in the solar system.
7. Which among the following is a correct Chronological Order of periods in the Geological Time Scale?
[A] Ordovician, Permian, Jurassic, Paleogene
[B] Jurassic, Paleogene, Ordovician, Permian,
[C] Permian, Ordovician, Jurassic, Paleogene
[D] Ordovician, Permian,Paleogene, Jurassic
Show Answer
Correct Answer: A [Ordovician, Permian, Jurassic, Paleogene]
Notes:
- Ordovician: The Ordovician period occurred from approximately 485 million to 443 million years ago. It was a time when marine life, especially diverse marine invertebrates, flourished.
- Permian: The Permian period occurred from approximately 299 million to 251 million years ago. It was characterized by the dominance of reptiles and the formation of the supercontinent Pangaea.
- Jurassic: The Jurassic period occurred from approximately 201 million to 145 million years ago. It was known for the dominance of dinosaurs, including iconic ones like the Brachiosaurus and Tyrannosaurus rex.
- Paleogene: The Paleogene period, often divided into the Paleocene, Eocene, and Oligocene epochs, occurred from approximately 66 million to 23 million years ago. This period saw the diversification of mammals and the decline of dinosaurs.
8. The correct sequence of different layers of the atmosphere from the surface of the Earth upwards is? (UPSC Prelims 1998)
[A] Troposphere, Stratosphere, Ionosphere, Mesosphere
[B] Stratosphere, Troposphere, Ionosphere, Mesosphere
[C] Troposphere, Stratosphere, Mesosphere, Ionosphere
[D] Stratosphere, Troposphere, Mesosphere, Ionosphere
Show Answer
Correct Answer: C [Troposphere, Stratosphere, Mesosphere, Ionosphere]
Notes:
The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and ionosphere. A further region at about 500 km above the Earth’s surface is called the exosphere.
9. Which one of the following statements is not correct? (UPSC Prelims 2004)
[A] Gulfs with narrow fronts and wider rears experience high tides.
[B] Tidal currents take place when a gulf is connected with the open sea by a narrow channel.
[C] Tidal bore occurs when a tide enters the narrow and shallow estuary of a river.
[D] The tidal nature of the mouth of the river Hooghly is of crucial importance to Kolkata as port.
Show Answer
Correct Answer: B [Tidal currents take place when a gulf is connected with the open sea by a narrow channel.]
Notes:
Tidal currents occur in conjunction with the rise and fall of the tide. The vertical motion of the tides near the shore causes the water to move horizontally, creating currents. When a tidal current moves toward the land and away from the sea, it “floods.”
10. In which one of the following oceans is Diamantina Trench situated? (UPSC Prelims 2006)
[A] Pacific Ocean
[B] Atlantic Ocean
[C] Indian Ocean
[D] Arctic Ocean
Show Answer
Correct Answer: C [Indian Ocean]
Notes:
The Diamantina Trench is a deep sea trench in the South East Indian Basin. With a maximum depth of 8,047 meters, it is the deepest trench of the Indian Ocean, deeper than the better-known Java Trench.
