Page Number- 9

(1) What are the names of India’s research stations in Antarctica?

  • A. Dakshin Bharat and Maitri
  • B. Maitri and Himadri
  • C. Dakshin Gangotri and Indira Point
  • D. Maitri and Dakshin Gangotri
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(d) Maitri and Dakshin Gangotri

(2) What is the thin layer of gas surrounding the Earth called?

  • A. Biosphere
  • B. Lithosphere
  • C. Atmosphere
  • D. Hydrosphere
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(c) Atmosphere

(3) Up to what height does the atmosphere extend?

  • A. 500 km
  • B. 800 km
  • C. 1,000 km
  • D. 1,600 km
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(d) 1,600 km

(4) Which is the correct order of atmospheric layers starting from the Earth's surface?

  • A. Stratosphere → Troposphere → Mesosphere → Thermosphere → Exosphere
  • B. Troposphere → Stratosphere → Mesosphere → Thermosphere → Exosphere
  • C. Troposphere → Mesosphere → Stratosphere → Exosphere → Thermosphere
  • D. Stratosphere → Troposphere → Thermosphere → Mesosphere → Exosphere
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(b) Troposphere → Stratosphere → Mesosphere → Thermosphere → Exosphere

(5) Which gases make up about 99% of clean, dry air?

  • A. Nitrogen and Methane
  • B. Oxygen and Argon
  • C. Nitrogen and Carbon Dioxide
  • D. Nitrogen and Oxygen
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(d) Nitrogen and Oxygen

(6) What percentage of the atmosphere is Nitrogen?

  • A. 1%
  • B. 21%
  • C. 78%
  • D. 99%
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(c) 78%

(7) What percentage of the atmosphere is Oxygen?

  • A. 1%
  • B. 21%
  • C. 78%
  • D. 99%
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(b) 21%

(8) percentage of other gases like carbon dioxide, argon, etc.?

  • A. 1%
  • B. 2%
  • C. 5%
  • D. 10%
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(a) 1%

(9) Hydrosphere comprise:?

  • A. Only oceans
  • B. Only rivers and lakes
  • C. ice, liquid water, and water vapour
  • D. Only underground water
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(c) ice, liquid water, and water vapour

(10) What percentage of the Earth's surface is covered with water?

  • A. 29%
  • B. 50%
  • C. 71%
  • D. 78%
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(c) 71%
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