WBBSE Class 6 Geography Chapter 5 Water Land Air MCQs

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WBBSE Chapter 5 Water Land Air Multiple Choice Questions

Question 1. The blanket of air that surrounds the earth and extends up to almost 10000 km above the earth’s surface is called the—

  1. Hydrosphere
  2. Lithosphere
  3. Atmosphere

Answer: 3. Atmosphere

Question 2. The main gaseous component of the atmosphere is—

  1. Nitrogen
  2. Oxygen
  3. Carbon dioxide

Answer: 1. Nitrogen

Question 3. The percentage of nitrogen in the atmosphere is almost—

  1. 20%
  2. 78%
  3. 3%

Answer: 2. 78%

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WBBSE Class 6 Geography Chapter 5 Water Land Air MCQs

Question 4. The percentage of oxygen in the atmosphere is almost—

  1. 21%
  2. 78%
  3. 3%

Answer: 1. 21%

Question 5. The main gaseous constituent of the atmospheric layer i.e. Available 20 km-25 km above the earth’s surface is—

  1. O2
  2. O3
  3. NO2

Answer: 2. O3

Question 6. The layer of the atmosphere that extends up to 16km above the earth’s surface is called the—

  1. Troposphere
  2. Stratosphere
  3. Mesosphere

Answer: 1. Troposphere

Question 7. The layer that sees an abundance of weather phenomena, like storms and rain is the—

  1. Troposphere
  2. Stratosphere
  3. Mesosphere

Answer: 1. Troposphere

Question 8. Harmful ultraviolet rays are absorbed in the—

  1. Mesosphere
  2. Ozonosphere
  3. Exosphere

Answer: 2. Ozonosphere

Question 9. Jet planes travel through—

  1. Ozonosphere
  2. Stratosphere
  3. Mesosphere

Answer: 2. Stratosphere

Question 10. The layer that reflects radio waves back towards the earth’s surface is the—

  1. Ionosphere
  2. Mesosphere
  3. Exosphere

Answer: 1. Ionosphere

Question 11. The number of meteors that rush towards the earth every day is—

  1. 10 Billion
  2. 150 Billion
  3. 200 Billion

Answer: 1. 10 Billion

Question 12. The thin, hard outermost layer of the earth is called the—

  1. Core
  2. Crust
  3. Mantle

Answer: 2. Core

Question 13. The innermost layer of the earth is—

  1. Crust
  2. Core
  3. Mantle

Answer: 2. Core

Question 14. Life on earth first originated—

  1. On land
  2. In air
  3. In water

Answer: 3. In water

Question 15. The drift of the continents from their previous position is called the—

  1. Continental drift
  2. Continental shift
  3. Continental movement

Answer: 1. Continental drift

Question 16. About 270 million years ago, there was only one landmass or supercontinent on the earth and this was called—

  1. Pangaea
  2. Panthalassa
  3. Geosyncline

Answer: 2. Pangaea

Question 17. Is the world’s largest continent.

  1. Europe
  2. Asia
  3. Africa

Answer: 2. Asia

Question 18. The continent where the temperature is always at or below the freezing point is—

  1. North America
  2. South America
  3. Antarctica

Answer: 3. Antarctica

Question 19. Is the world’s smallest continent.

  1. Asia
  2. Oceania
  3. Africa

Answer: 2. Oceania

Question 20. The largest ocean in the world is—

  1. Pacific Ocean
  2. Atlantic ocean
  3. Indian Ocean

Answer: 1. Pacific Ocean

Question 21. The smallest ocean on earth is—

  1. Arctic Ocean
  2. Antarctic ocean
  3. Indian Ocean

Answer: 1. Antarctic ocean

Question 22. The highest mountain on earth is—

  1. Everest
  2. Aconcagua
  3. Kilimanjaro

Answer: 1. Everest

Question 23. The longest mountain range on earth is the—

  1. Himalayas
  2. Andes
  3. Alps

Answer: 2. Andes

Question 24. The longest river in the world is—

  1. Amazon
  2. Nile
  3. Mississippi

Answer: 2. Nile

Question 25. The largest river in the world in terms of area is—

  1. Amazon
  2. Nile
  3. Mississippi

Answer: 1. Amazon

Question 26. The fourth largest river system in the world is—

  1. The ganga-brahmaputra
  2. The Mississippi-Missouri
  3. The rhine-ruhr

Answer: 2. The Mississippi-Missouri

Question 27. The southern hemisphere has more water than the northern hemisphere.

  1. 10%
  2. 15%
  3. 75%

Answer: 2. 15%

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