1. What is the primary force controlling Earth’s atmosphere?
(a). Magnetism
(b). Gravity
(c). Electromagnetic radiation
(d). Nuclear fusion
2. How is the Earth’s atmosphere divided into different layers?
(a). Geographical features
(b). Altitude and temperature
(c). Ocean currents
(d). Magnetic field
3. What is the primary factor controlling Earth’s thermal balance?
(a). Greenhouse effect
(b). Wind pattern
(c). Ocean currents
(d). Solar flares
4. At what altitude does oxygen reduce to almost zero level?
(a). 50 km
(b). 90 km
(c). 120 km
(d). 150 km
5. Which two gases are most dominant in Earth’s atmosphere?
(a). Oxygen and carbon dioxide
(b). Nitrogen and oxygen
(c). Carbon dioxide and water vapor
(d). Argon and ozone
6. What is the average temperature of the earth’s surface maintained by the greenhouse effect?
(a). 0°C
(b). 15°C
(c). 30°C
(d). 45°C
7. How does nitrogen contribute to the nitrogen cycle?
(a). It facilitates photosynthesis
(b). It helps in respiration
(c). It is necessary for chlorophyll production in plants.
(d). It forms ozone in the stratosphere
8. Which gas acts as a lifeline for humans and animals through respiration?
(a). Carbon dioxide
(b). Nitrogen
(c). Oxygen
(d). Ozone
9. What percentage of Earth’s atmosphere is made up of carbon dioxide?
(a). 0.036%
(b). 0.93%
(c). 21%
(d). 78%
10. What is the primary function of ozone in the stratosphere?
(a). Greenhouse effect
(b). Ultraviolet radiation shield
(c). Photosynthesis
(d). Formation of aerosols
11. Which gas constitutes about 0.93% of the atmosphere and is considered an inert gas?
(a). Oxygen
(b). Argon
(c). Carbon dioxide
(d). Water vapor
12. Which human activity has caused the formation of ozone hole in the stratosphere?
(a). Deforestation
(b). Industrial pollution
(c). Release of chlorofluorocarbons (CFCs)
(d). Agricultural practices
13. The quantity of which gas fluctuates depending on geographical and climatic conditions?
(a). Argon
(b). Carbon dioxide
(c). Water vapor
(d). Ozone
14. What is the role of aerosols in the atmosphere?
(a). Absorbing solar radiation
(b). Increasing ozone levels
(c). Acting as nuclei for water vapor condensation
(d). Facilitate photosynthesis
15. What is the primary effect of carbon dioxide on Earth’s atmosphere?
(a). Ozone depletion
(b). Greenhouse effect
(c). Ultraviolet radiation shielding
(d). Formation of aerosols
16. Which global initiative aims to regulate and mitigate the effects of elevated carbon dioxide levels?
(a). Montreal Protocol and Kigali Agreement
(b).Paris Climate Conference and Kyoto Protocol
(c). Vienna Convention and Basel Convention
(d). Rio Earth Summit and Stockholm Convention
17. What is the primary source of aerosols in the atmosphere?
(a). Volcanic eruption
(b). Solar flares
(c). Meteorite
(d). Wind pattern
18. What is the primary function of water vapor in the atmosphere?
(a). Ozone production
(b). Ultraviolet radiation shielding
(c). Greenhouse effect
(d). Cloud formation and rain
19. Which atmospheric layer is closest to the Earth’s surface?
(a). Exosphere
(b). Troposphere
(c). Mesosphere
(d). Stratosphere
20. Which phenomenon results from the selective permeability of the atmosphere to solar radiation?
(a). Greenhouse effect
(b). Formation of ozone layer
(c). Aurora Borealis
(d). Photosynthesis
21. What is the main feature used to separate the layers of the atmosphere?
(a). Magnetic field strength
(b). Gaseous structure
(c). Temperature
(d). Humidity level
22. Which gas in the atmosphere is necessary for the production of chlorophyll in plants?
(a). Oxygen
(b). Nitrogen
(c). Carbon dioxide
(d). Argon
23. What is the primary consequence of the release of chlorofluorocarbons (CFCs) into the atmosphere?
(a). Formation of acid rain
(b). Ozone layer depletion
(c). Greenhouse gas reduction
(d). Aerosol increase
24. What is the role of water vapor in the greenhouse effect?
(a). Absorbing solar radiation
(b). Increasing ozone levels
(c). Trapping heat and warming the atmosphere
(d). Facilitate photosynthesis
25. Which gas is considered an inert gas which has no significant effect on Earth’s weather processes?
(a). Oxygen
(b). Carbon dioxide
(c). Argon
(d). Ozone