💥Join UPSC 2027,2028 Mentorship (July Batch) + XFactor Notes & Microthemes PDF
Talk to Mentor

Civilsdaily

Login

,

Why are dewdrops not formed on a cloudy night?

(a)

Clouds absorb the radiation released from the Earth’s surface.

(b)

Clouds reflect back the Earth’s radiation.

(c)

The Earth’s surface would have low temperature on cloudy nights.

(d)

Clouds deflect the blowing wind to ground level.

Correct Answer

(b)

Explanation

During clear sky reflectivity of long wave
radiation is maximum but the biggest single
deterrent to radiation cooling is cloudy night.
Water droplets present in the cloud absorbs
radiations emitted by earth surface and
reradiates some of the heat back again to earth
thus, prevents dew formation.

Microtheme: Climate Type —
7 questions asked in Prelims in the past.

  1. [2026] With reference to the climate of Andaman and Nicobar Islands, which of the following statements is/are correct?
    1. The climate can be defined as a humid, tropical coastal climate.
    2. It receives rainfall from both South-west monsoon and North-east monsoon.
    3. Maximum precipitation is between December and May.

    • (a) 1 only
    • (b) 1 and 2
    • (c) 2 and 3
    • (d) 3 only
    Correct Answer: (B) 1 and 2
  2. [2024] Consider the following description:
    1. Annual and daily range of temperatures is low.
    2. Precipitation occurs throughout the year.
    3. Precipitation varies between 50 cm – 250 cm.
    What is this type of climate?

    • (a) Equatorial Climate
    • (b) China type climate
    • (c) Humid sub tropical climate
    • (d) Marine west coast climate*
    Correct Answer: (D) Marine west coast climate*
  3. [2019] Why are dewdrops not formed on a cloudy night?

    • (a) Clouds absorb the radiation released from the Earth's surface.
    • (b) Clouds reflect back the Earth's radiation.
    • (c) The Earth's surface would have low temperature on cloudy nights.
    • (d) Clouds deflect the blowing wind to ground level.
    Correct Answer: (B) Clouds reflect back the Earth's radiation.
  4. [2015] Each day is more or less the same, the morning is clear and bright with a sea breeze; as the Sun climbs high in the sky, heat mounts up, dark clouds form, then rain comes with thunder and lightning. But rain is soon over.
    Which of the following regions is described in the above passage?

    • (a) Savannah
    • (b) Equatorial
    • (c) Monsoon
    • (d) Mediterranean
    Correct Answer: (B) Equatorial
  5. [2013] Climate is extreme, rainfall is scanty and the people used to be nomadic herders.
    The above statement best describes which of the following regions?

    • (a) African Savannah
    • (b) Central Asian Steppe
    • (c) North American Prairie
    • (d) Siberian Tundra
    Correct Answer: (B) Central Asian Steppe
  6. [2013] During a thunderstorm, the thunder in the skies is produced by the
    (1)Meeting of cumulonimbus clouds in the sky
    (2)Lightning that separates the nimbus clouds
    (3)Violent upward movement of air and water particles
    Select the correct answer using the codes given below.

    • (a) 1 only
    • (b) 2 and 3
    • (c) 1 and 3
    • (d) None of the above produces the thunder
    Correct Answer: (D) None of the above produces the thunder
  7. [2010] A geographic region has the following distinct characteristics:
    1. Warm and dry climate
    2. Mild and wet winter
    3. Evergreen oak trees The above features are the distinct characteristics of which one of the following regions ?

    • (a) Mediterranean
    • (b) Eastern China
    • (c) Central Asia
    • (d) Atlantic Coast of North America
    Correct Answer: (A) Mediterranean