quiz

Atmosphere: Structure and Composition

1. Which gas is abundant in the atmosphere of Earth?

  • A) Oxygen
  • B) Nitrogen
  • C) Carbon dioxide
  • D) Argon
B) Nitrogen Explanation

2. What is the approximate percentage of oxygen in Earth’s atmosphere?

  • A) 21% 
  • B) 50%
  • C) 78% 
  • D) 0.04%
A) 21%  Explanation

3. Which gas is responsible for the greenhouse effect in Earth’s atmosphere?

  • A) Oxygen
  • B) Nitrogen
  • C) Hydrogen
  • D) Carbon dioxide
D) Carbon dioxide Explanation

4. How much does the Earth’s atmosphere weigh in total? 

  • A) 5.5 quadrillion tons
  • B) 7.8 billion metric tons
  • C) 1.2 trillion metric tons
  • D) 3.6 quintillion tons
A) 5.5 quadrillion tons Explanation

5. Which gases give the sky on Earth its blue colour?

  • A) Methane and helium
  • B) Nitrogen and oxygen
  • C) Argon and neon
  • D) Ozone and water vapor
B) Nitrogen and oxygen Explanation

6. Which gas is responsible for the distinct smell after a lightning storm? 

  • A) Nitrogen 
  • B) Oxygen 
  • C) Ozone 
  • D) Carbon dioxide
C) Ozone Explanation

7. What is a paleoatmosphere?

  • A)  The current atmosphere of Earth
  • B) An atmosphere on another planet 
  • C) An atmosphere that existed in the past on Earth 
  • D) An atmosphere created by human activity
C) An atmosphere that existed in the past on Earth  Explanation

8. Which gas is present in variable amounts in Earth’s current atmosphere?

  • A) Nitrogen
  • B) Oxygen
  • C) Argon
  • D) Water vapor
D) Water vapor Explanation

9. What role do dust particles play in cloud formation? 

  • A) Repel water vapor
  • B) Reflecting sunlight
  • C) Creating thunderstorms 
  • D) Acting as hygroscopic nuclei
D) Acting as hygroscopic nuclei Explanation

10. Which of the following parts of the electromagnetic spectrum has a longer wavelength?

  • A) Ultraviolet
  • B) Infrared
  • C) Violet
  • D) Green
B) Infrared Explanation

11. Which field of study focuses on long-term weather patterns and climate trends?

  • A) Climatology 
  • B) Meteorology 
  • C) Aerodynamics 
  • D) Thermodynamics
A) Climatology Explanation

12. What are auroras?

  • A) Meteor showers
  • B) Natural light displays
  • C) Celestial alignments 
  • D) Lunar eclipses
B) Natural light displays Explanation

13. What is the global average concentration of carbon dioxide (CO2) in the atmosphere?

  • A) 280 ppm
  • B) 315 ppm 
  • C) 421 ppm 
  • D) 550 ppm 
C) 421 ppm Explanation

14. Which process converts atmospheric nitrogen into usable forms for organisms?

  • A) Photosynthesis
  • B) Nitrogen fixation 
  • C) Respiration
  • D) Combustion
B) Nitrogen fixation Explanation

15. What is the primary source of oxygen production in Earth’s atmosphere?

  • A) Volcanic activity
  • B)  Burning of fossil fuels 
  • C) Photosynthesis 
  • D) Industrial processes
C) Photosynthesis  Explanation

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