Test: Introduction To Earth & Universe (Medium Level)


8 Questions MCQ Test Geography for UPSC CSE | Test: Introduction To Earth & Universe (Medium Level)


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QUESTION: 1

The Goldilocks Zone refers to the habitable zone which is the area around a star where it is not too hot nor too cold for :

Solution: The Goldilocks Zone refers to the habitable zone. The habitable zone is the area around a star where it is not too hot nor too cold for liquid water to exist on the surface of surrounding planets.

QUESTION: 2

According to Interstellar Dust Hypothesis, the embryo which is formed as a result of aggregation and accretion grew in size to form:

Solution:

Collision among the dust particles started the process of aggregation and accretion around the bigger particles which became the embryos of the future planets.

With the passage of time these embryos captured more and more matter and thus grew in size to become asteroids which in turn grew in size due to continuous accretion of nearby matter around them and thus they became planets.

QUESTION: 3

The formation of the Auroras results from the excitation of which of the following molecular electrons?

Solution:

Aurora is the name given to the luminous glow in the upper atmosphere of the Earth which is produced by charged particles descending from the planet’s magnetosphere. Some of these particles penetrate the ionosphere and collide with the atoms there.

This results in an excitation of the oxygen and nitrogen molecular electrons. The molecules get back to their original state by emitting photons of light which are the aurorae.

QUESTION: 4

Consider the following statements regarding the Gaseous Hypothesis by Kant:

1. In his theory, Kant explained the source of the origin of the primordial matter.

2. He did not explain the source of energy which caused the random motion of cold matter, which was motionless in the initial stage.

Choose the correct answer from the codes given below:

Solution:

In his theory, Kant did not explain the source of the origin of the primordial matter. He also did not explain the source of energy which caused the random motion of cold matter, which was motionless in the initial stage. The collision among the particles of the primordial matter can never generate rotatory motion in it. So it is an erroneous statement of mechanism. Kant’s assumption was against the law of conservation of angular momentum that the rotatory speed of the nebula increased with the increase of its size.

QUESTION: 5

Which of the following are the effects of Geomagnetic storms:

1. Long-range radio communication becomes difficult due to radio wave distortion.

2. Satellite drag

3. Astronauts and high-altitude pilots would face high radiation levels.

4. Electric power grids would see a high increase in voltage that would cause blackouts.

Choose the correct answer from the codes given below:

Solution:

Effects of Geomagnetic storms

  • The ionosphere gets heated and distorted, which makes long-range radio communication difficult.
  • Ionospheric expansion can increase satellite drag, and it may become difficult to control their orbits.
  • Geomagnetic storms disrupt satellite communication systems like GPS.
  • Astronauts and high-altitude pilots would face high radiation levels.
  • Electric power grids would see a high increase in voltage that would cause blackouts
QUESTION: 6

Laplace’s Hypothesis was a modified version of:

Solution: Laplace’s Nebular Hypothesis is the modified version of Kant’s

Gaseous hypothesis.

QUESTION: 7

Consider the following statements:

1. Comets are icy balls that form in the outer solar system.

2. Several comets have circular orbits that cut across the orbits of planets.

3. Their surfaces are warm and fickle materials vaporize.

4. They are the remains and the leftovers from the solar system formation.

Choose the correct answer from the codes given below:

Solution:

Comets are comparatively small, flimsy, erratically shaped bodies. They are the leftovers from the solar system formation. Comets are icy balls that form in the outer solar system. The icy surface is entrenched with grit, dust & particles from space.

Several comets have elliptical orbits that cut across the orbits of planets, taking them very close to the sun & then swinging them far away. The far-off comets may take more than 30 million years to complete 1 orbit.

QUESTION: 8

The Collision Hypothesis proposed by Harold Jeffreys, involved the collision and  movement of  how many celestial bodies.

Solution:

According to the Collision Hypothesis proposed by Harold Jeffreys, there were three stars in the Universe before the origin of the solar system. primitive sun, the ‘companion star’ and the ‘intruding star’ which was moving towards ‘companion star’.