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UPSC CDS Environment & Ecology — practice questions — page 14

Explore 446 free Environment & Ecology questions in UPSC CDS Geography. Open each question or exercise to read its content, reference answers and available explanation.

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Environment & Ecology questions and exercises with answers

Showing questions 391–420 of 446.

With no atmosphere, the Moon's surface temperature ranges from minus 190 degrees Celsius up to:Read the answer and worked solution →In coastal regions during the day, wind blows from:Read the answer and worked solution →Air rising over heated land during the day creates a region of:Read the answer and worked solution →Water vapour condenses into cloud droplets around which particles acting as nuclei?Read the answer and worked solution →In large parts of India, rains are brought by the north-east monsoon and the:Read the answer and worked solution →Organisms very sensitive to sulphur dioxide levels, used as air pollution indicators, are:Read the answer and worked solution →Fresh water is found frozen in the ice-caps at the:Read the answer and worked solution →Terrestrial life-forms need fresh water because their bodies cannot tolerate high amounts of:Read the answer and worked solution →Paper industries release which poisonous substance into water bodies?Read the answer and worked solution →Sudden release of cold water from deep dam reservoirs harms aquatic life by changing:Read the answer and worked solution →Rocks crack because the Sun heats them by day and they:Read the answer and worked solution →Which organisms release substances that powder rock surfaces to form the first thin soil layer?Read the answer and worked solution →The bits of decayed living organisms in soil are called:Read the answer and worked solution →The topmost soil layer containing humus and living organisms is the:Read the answer and worked solution →Long-term use of fertilisers and pesticides destroys soil structure by killing:Read the answer and worked solution →Nitrogen-fixing bacteria are most commonly found in the root nodules of:Read the answer and worked solution →During lightning, atmospheric nitrogen is converted into:Read the answer and worked solution →Carbon occurs in elemental form as graphite and:Read the answer and worked solution →The percentage of carbon dioxide in the atmosphere is said to have doubled since the:Read the answer and worked solution →Catch the soil makersRead the answer and worked solution →Pop the water pollutantsRead the answer and worked solution →Run the resource numbersRead the answer and worked solution →Slice the resource wordsRead the answer and worked solution →Abiotic or bioticRead the answer and worked solution →Sort the cyclesRead the answer and worked solution →Type the numberRead the answer and worked solution →Natural resources bingoRead the answer and worked solution →The United Nations recommends a minimum of how much water per person per day for drinking, washing and hygiene?Read the answer and worked solution →The UN minimum of 50 litres a day is about how many buckets of water?Read the answer and worked solution →In a few years, what share of the world's people could face water scarcity?Read the answer and worked solution →

Worked practice questions

With no atmosphere, the Moon's surface temperature ranges from minus 190 degrees Celsius up to:

  1. 500 C
  2. 110 C
  3. 50 C
  4. 30 C
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Correct answer: B. 110 C

1. The Moon is about as far from the Sun as Earth. 2. Its temperature swings from minus 190 to 110 degrees. 3. Earth's atmosphere keeps temperatures steady. _Source: syllabus Science, Chapter 14, Natural Resources._

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In coastal regions during the day, wind blows from:

  1. Pole to equator
  2. Hill to valley
  3. Sea to land
  4. Land to sea
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Correct answer: C. Sea to land

1. Land heats faster, so air over it rises. 2. Sea air moves into the low pressure over land. 3. At night the direction reverses. _Source: syllabus Science, Chapter 14, Natural Resources._

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Air rising over heated land during the day creates a region of:

  1. High pressure
  2. No pressure
  3. Fixed pressure
  4. Low pressure
Show answer and solution

Correct answer: D. Low pressure

1. Hot air rises. 2. A low pressure region forms below it. 3. Cooler sea air flows in to fill it. _Source: syllabus Science, Chapter 14, Natural Resources._

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