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UPSC CDS Environment & Ecology — practice questions — page 15

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 421–446 of 446.

About what share of the earth's surface is covered with water?Read the answer and worked solution →Water fit for human use is:Read the answer and worked solution →Usable water on earth is roughly what share of all water?Read the answer and worked solution →Water in glaciers, ice caps and permanent snow is:Read the answer and worked solution →Continuous cycling of water among its three forms keeps the total water on earth:Read the answer and worked solution →The upper level of the layer where soil gaps and rock cracks are filled with water is the:Read the answer and worked solution →Water found below the water table is called:Read the answer and worked solution →The seeping of water into the ground is called:Read the answer and worked solution →Groundwater stored between layers of hard rock below the water table is an:Read the answer and worked solution →A grass lawn versus a pukka floor: which lets rainwater seep in easily?Read the answer and worked solution →Most Indian farmers depend on which source to irrigate crops?Read the answer and worked solution →Excessive rains cause floods, while absence of rain results in:Read the answer and worked solution →Using rainwater to recharge groundwater is called:Read the answer and worked solution →Bawris, now being revived, were traditional structures for:Read the answer and worked solution →Watering plants through narrow tubes delivering water at the base of the plant is:Read the answer and worked solution →Bhujpur, where villagers built check-dams in 1989, is in which region?Read the answer and worked solution →Bhujpur's check-dams were built on which river and its tributaries?Read the answer and worked solution →How many check-dams did Bhujpur villagers build in 1989?Read the answer and worked solution →Catch the water table drainersRead the answer and worked solution →Pop the water cycle stepsRead the answer and worked solution →Run the water numbersRead the answer and worked solution →Slice the water wordsRead the answer and worked solution →Usable or unusable waterRead the answer and worked solution →Sort cause, effect and fixRead the answer and worked solution →Type the numberRead the answer and worked solution →Water resource bingoRead the answer and worked solution →

Worked practice questions

About what share of the earth's surface is covered with water?

  1. 90 per cent
  2. 71 per cent
  3. 50 per cent
  4. 25 per cent
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Correct answer: B. 71 per cent

1. Earth appears blue from space. 2. About 71 per cent is water. 3. Most of it is not fit for direct use. _Source: syllabus Science, Chapter 16, Water: A Precious Resource._

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Water fit for human use is:

  1. Saline water
  2. Brackish
  3. Freshwater
  4. Sea water
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Correct answer: C. Freshwater

1. Sea water is saline. 2. Only freshwater is fit for use. 3. It is a tiny fraction of all water. _Source: syllabus Science, Chapter 16, Water: A Precious Resource._

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Usable water on earth is roughly what share of all water?

  1. 6 per cent
  2. 0.6 per cent
  3. 60 per cent
  4. 0.006 per cent
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Correct answer: D. 0.006 per cent

1. The bucket activity shows the proportions. 2. Usable water is roughly 0.006 per cent. 3. It is an alarmingly small quantity. _Source: syllabus Science, Chapter 16, Water: A Precious Resource._

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