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UPSC CDS Current Affairs — practice questions — page 3

Explore 218 free Current Affairs questions in UPSC CDS Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Current Affairs questions and exercises with answers

Showing questions 61–90 of 218.

Catch the greenhouse gasesRead the answer and worked solution →Pop the water pollution wordsRead the answer and worked solution →Run the environmental yearsRead the answer and worked solution →Slice the pollution wordsRead the answer and worked solution →Air or waterRead the answer and worked solution →Sort the case studiesRead the answer and worked solution →Type the numberRead the answer and worked solution →Environmental issues bingoRead the answer and worked solution →A gardener notes temperature, rainfall, wind and soil in her plot. These are which components of the ecosystem?Read the answer and worked solution →A garden, a crop field and an aquarium are all examples of:Read the answer and worked solution →Green plants and certain bacteria that make food by photosynthesis are called:Read the answer and worked solution →Bacteria and fungi that break down dead remains into simple inorganic substances are:Read the answer and worked solution →Each step or level of a food chain is called a:Read the answer and worked solution →In a food chain, herbivores or primary consumers occupy which trophic level?Read the answer and worked solution →Large carnivores or tertiary consumers form which trophic level?Read the answer and worked solution →Green plants in a land ecosystem capture about what share of the sunlight falling on their leaves?Read the answer and worked solution →On average, what share of food eaten at one trophic level becomes available to the next?Read the answer and worked solution →Because so little energy passes on, food chains generally have how many steps?Read the answer and worked solution →A network of many interlinked food chains shown as branching lines is a:Read the answer and worked solution →Energy flow through the trophic levels of an ecosystem is:Read the answer and worked solution →Pesticide residues build up most in which organisms of a food chain?Read the answer and worked solution →Progressive accumulation of non-degradable chemicals at each trophic level is called:Read the answer and worked solution →Ozone is a molecule formed by how many atoms of oxygen?Read the answer and worked solution →Ozone high in the atmosphere shields the Earth from:Read the answer and worked solution →Atmospheric ozone began to drop sharply in which decade?Read the answer and worked solution →Which chemicals, used as refrigerants and in fire extinguishers, deplete the ozone layer?Read the answer and worked solution →In 1987, which UN body forged an agreement to freeze CFC production at 1986 levels?Read the answer and worked solution →Plastics are not broken down by bacteria because:Read the answer and worked solution →Substances broken down by biological processes are called:Read the answer and worked solution →Changes in which practice have made much of our household waste non-biodegradable?Read the answer and worked solution →

Worked practice questions

Catch the greenhouse gases

Read exercise and reference answers
Items
  1. Matches the category
    Yes
    Item
    Carbon dioxide
  2. Matches the category
    Yes
    Item
    Methane
  3. Matches the category
    Yes
    Item
    Nitrous oxide
  4. Matches the category
    Yes
    Item
    CFCs
  5. Matches the category
    No
    Item
    Oxygen
  6. Matches the category
    No
    Item
    Nitrogen
  7. Matches the category
    No
    Item
    Dobson unit
  8. Matches the category
    No
    Item
    Polyblend
Category
Greenhouse gas
Instructions
Catch the greenhouse gases. Let the other words fall.
_Source: syllabus Biology, Chapter 16, Environmental Issues._

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Pop the water pollution words

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Other terms
  1. Scrubber
  2. PM 2.5
  3. Catalytic
  4. Noise
Matching terms
  1. BOD
  2. Algal bloom
  3. Hyacinth
  4. Eutrophic
  5. DDT
  6. Heavy metals
Instructions
Pop the words about water pollution. Leave the air pollution words.
_Source: syllabus Biology, Chapter 16, Environmental Issues._

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Run the environmental years

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Questions
  1. Correct
    1974
    Choices
    1. 1974
    2. 1981
    3. 1986
  2. Correct
    1981
    Choices
    1. 1974
    2. 1981
    3. 1986
  3. Correct
    1986
    Choices
    1. 1974
    2. 1981
    3. 1986
  4. Correct
    1987
    Choices
    1. 1987
    2. 1974
    3. 2002
  5. Correct
    1974
    Choices
    1. 1987
    2. 1974
    3. 2002
  6. Correct
    2002
    Choices
    1. 1987
    2. 1974
    3. 2002
Instructions
Year of: Water Act, Air Act, Environment Act; then Montreal Protocol, Chipko, Delhi CNG buses.
_Source: syllabus Biology, Chapter 16, Environmental Issues._

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