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UPSC CSE Science & Technology — practice questions — page 7

Explore 248 free Science & Technology questions in UPSC CSE Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Science & Technology questions and exercises with answers

Showing questions 181–210 of 248.

Catch the greenhouse gasesRead the answer and worked solution →Pop the air pollutantsRead the answer and worked solution →Run the pollution numbersRead the answer and worked solution →Slice the pollution wordsRead the answer and worked solution →Air or water pollutantRead the answer and worked solution →Sort cause, effect and remedyRead the answer and worked solution →Type the numberRead the answer and worked solution →Air and water pollution bingoRead the answer and worked solution →Forests are called green lungs because plants release oxygen through:Read the answer and worked solution →The branchy part of a tree above the stem is the:Read the answer and worked solution →The roof-like cover formed by branches of tall trees over other plants is the:Read the answer and worked solution →The horizontal layers created by trees of different crown heights are called:Read the answer and worked solution →The lowest layer of a forest is formed by:Read the answer and worked solution →In the food chain grass, insects, frog, snake, the top consumer is the:Read the answer and worked solution →Microorganisms that convert dead plants and animals into humus are:Read the answer and worked solution →The dark coloured substance formed from dead plant and animal tissue is:Read the answer and worked solution →Dead animals in a forest become food for jackals, insects, crows and:Read the answer and worked solution →Forests help maintain the balance of oxygen and which gas in the atmosphere?Read the answer and worked solution →Trees return water to the air through their leaves by:Read the answer and worked solution →Forest officers can recognise the presence of animals by their footprints and:Read the answer and worked solution →Seedlings sprouting from a heap of animal dung show that animals help forests by:Read the answer and worked solution →In a forest, rain does not hit the ground directly because the canopy:Read the answer and worked solution →Forests act as natural absorbers of rainwater and so help maintain the:Read the answer and worked solution →Without trees, heavy rain hitting the ground directly may cause:Read the answer and worked solution →Roots of trees protect soil by:Read the answer and worked solution →Villagers near a forest enjoy less noise pollution because the forest:Read the answer and worked solution →Tibu's village and its fields were created by clearing forest about how many years ago?Read the answer and worked solution →The forest near Tibu's village is not regenerating because of indiscriminate felling and:Read the answer and worked solution →Which forest trees did Tibu help the children identify?Read the answer and worked solution →People of tribes living in forests have traditional knowledge about: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
    Water vapour
  5. Matches the category
    No
    Item
    Oxygen
  6. Matches the category
    No
    Item
    Nitrogen
  7. Matches the category
    No
    Item
    Argon
  8. Matches the category
    No
    Item
    Helium
Category
Greenhouse gases
Instructions
Catch the gases that trap heat. Let the harmless air gases fall.
_Source: syllabus Science, Chapter 18, Pollution of Air and Water._

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Pop the air pollutants

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Other terms
  1. Oxygen
  2. Nitrogen
  3. Argon
  4. Water
Matching terms
  1. Carbon monoxide
  2. Sulphur dioxide
  3. Nitrogen oxides
  4. CFCs
  5. Smoke
  6. Soot
Instructions
Pop the air pollutants. Leave the normal components of clean air.
_Source: syllabus Science, Chapter 18, Pollution of Air and Water._

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Run the pollution numbers

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Questions
  1. Correct
    78
    Choices
    1. 78
    2. 21
    3. 2
  2. Correct
    21
    Choices
    1. 78
    2. 21
    3. 2
  3. Correct
    2
    Choices
    1. 78
    2. 21
    3. 2
  4. Correct
    1985
    Choices
    1. 1985
    2. 2016
    3. 5000
  5. Correct
    2016
    Choices
    1. 1985
    2. 2016
    3. 5000
  6. Correct
    5000
    Choices
    1. 1985
    2. 2016
    3. 5000
Instructions
Air: % nitrogen, % oxygen, degrees rise feared; then Ganga Plan year, Clean Ganga year, Kanpur industries.
_Source: syllabus Science, Chapter 18, Pollution of Air and Water._

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