Question 1

Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe? 1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space Select the correct answer using the codes given below:

Accepted Answer

In order to provide evidence for the continued expansion of the universe, scientists point to the detection of microwaves in space and the observation of the redshift phenomenon. These phenomena are key indicators of the universe's ongoing expansion. Movement of asteroids in space and the occurrence of supernova explosions are not directly cited as evidence for the expansion. Therefore, the correct answer is option (a): 1 and 2.

Question 2

Assertion (A): The amount of moisture in the atmosphere is related to latitude Reason (R): The capacity to hold moisture in the form of water vapour is related to temperature.

Accepted Answer

In the context of physical geography, the assertion that the amount of moisture in the atmosphere is linked to latitude is supported by the reason that the atmosphere's ability to retain moisture in the form of water vapor is influenced by temperature. The relationship between latitude and temperature affects the capacity of the atmosphere to hold moisture. Therefore, both the assertion and the reason are individually true, and the reason correctly explains the assertion.

Question 3

The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? 1. There are no clouds or water vapour in the lower stratosphere. 2. There are no vertical winds in the lower stratosphere. Which of the statements given above is/are correct in this context?

Accepted Answer

Jet aircrafts fly smoothly in the lower stratosphere because this region lacks clouds and water vapor, reducing turbulence. Additionally, the absence of vertical winds in the lower stratosphere contributes to the ease of flight for jets. The correct explanation for their smooth flying experience is that both statements 1 and 2 are true in this context.

Question 4

On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 hours? 1. Equator 2. Tropic of Cancer 3. Tropic of Capricorn 4. Arctic Circle. Select the correct answer using the code given below:

Accepted Answer

During the summer solstice on June 21, the Tropic of Cancer and the Arctic Circle experience more than 12 hours of sunlight due to the Earth's axial tilt. This phenomenon occurs because the Northern Hemisphere is tilted towards the Sun during this time, leading to longer daylight hours in these regions.

Question 5

Assertion (A): Existence of human life on Venus is highly improbable. Reason (R): Venus has extremely high level of carbon dioxide in its atmosphere.

Accepted Answer

The probability of human life existing on Venus is considered very low due to the extremely high levels of carbon dioxide in its atmosphere. The atmosphere of Venus is mainly made up of carbon dioxide and is denser and hotter compared to Earth's atmosphere.

Physical Geography - Atmosphere — UPSC Previous Year Questions

Year-wise Distribution

Sample Questions

Physical Geography - Atmosphere — UPSC Previous Year Questions

Year-wise Distribution

Sample Questions