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How many layers does Earth’s atmosphere have?

How many layers does Earth’s atmosphere have?

  • (a) 4
  • (b) 5
  • (c) 6
  • (d) 8
  • The five main layers of Earth's atmosphere are referred to as the troposphere, stratosphere, mesosphere, thermosphere and exosphere, and progress from lowest altitude to highest altitude. Each layer is distinctive by temperature, with the troposphere being the densest and having the majority of the Earth's weather (0-12 km); and the exosphere fainting into space (700-10,000 km).
  • 1. Troposphere (0 to 12 km): The lower level of the atmosphere contains approximately 75-80% of the mass of the atmosphere; it is the base level of the atmosphere and the region where humans live and experience climate phenomena (weather).
  • 2. Stratosphere (12 to 50 km): The stratosphere contains the ozone layer, which absorbs dangerous ultraviolet radiation produced by the sun, and is where commercial aviation occurs.
  • 3. Mesosphere (50 to 80 km): The mezosphere is the third layer of the atmosphere and is the coldest layer, where meteors burn up upon entering the earth's atmosphere.
  • 4. Thermosphere (80 to 700 km): The thermosphere is the hottest layer of the Earth's atmosphere, with temperatures exceeding 1,000 degrees Fahrenheit (537 degrees Celsius), and is where the auroras (Northern/Southern Lights) occur.
  • 5. Exosphere (700 to 10,000 km): The exosphere is the outermost and least dense layer of the atmosphere and is where a large proportion of telecommunications satellites orbit.[
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Related MCQs:

 ‘NATO’ is an abbreviation of:

March 18, 2026 No Comments
  • (A) North Atlantic Treaty Organization
  • (B) Non-Aligned Treaty Organization
  • (C) Non-Aligned Trading Organization
  • (D) North American Transport Organization

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