This set of Environmental Science Multiple Choice Questions & Answers (MCQs) focuses on “Climate Model”.
1. What would have been the average temperature of Earth without greenhouse gases?
a) 0oC
b) -7oC
c) -9oC
d) -19oC
View Answer
Explanation: Without greenhouse gases, the Earth’s average temperature (currently about 14oC), would have been 33oC less.
2. Ever since the industrial revolution, by how much has the average temperature of the Earth increased?
a) 0.24oC
b) 0.6oC
c) 1.2oC
d) 1.8oC
View Answer
Explanation: Since the industrial revolution, the average temperature of earth has increased by 0.6oC due to consumption of fossil fuels.
3. How much of the sun’s radiation energy is absorbed by the greenhouse gases to warm the planet?
a) 75PW
b) 1750GW
c) 1500MW
d) 150TW
View Answer
Explanation: The greenhouses gases, mainly carbon dioxide and water vapour absorb nearly 75 peta-watts of the infrared radiations from the sun.
4. What is the emissivity of the Earth’s surface?
a) 0.457
b) 0.578
c) 0.135
d) 1.42
View Answer
Explanation: Earth has an emissivity of 0.457.
5. The Earth is still said to be in the “ice age” period.
a) True
b) False
View Answer
Explanation: As per definition, ice age refers to the period when there are large ice sheets in both the hemispheres. Antarctica, Greenland and Arctic ice sheets are the reason we are still in Holocene of the ice age.
6. In which layer of the ionosphere does the International Space Station orbit?
a) D
b) E
c) F
d) G
View Answer
Explanation: The F-layer of the ionosphere has enough atmospheric resistance for the orbiting of International Space station and space shuttle.
7. Which type of clouds is found in the highest altitude of the Earth’s atmosphere?
a) Noctilucent
b) Cirrostratus
c) Stratus
d) Cirrus
View Answer
Explanation: The noctilucent clouds or night clouds are found in the mesosphere at an altitude of approximately 80km.
8. What is the significance of the ionosphere?
a) Aviation movements
b) High frequency radio transmission
c) Regulates weather
d) All of the mentioned
View Answer
Explanation: Ionosphere contains ionized atmospheric particles due to solar radiation and is useful in the propagation of radio waves.
9. Troposphere contains nearly 80% of the atmosphere by mass.
a) True
b) False
View Answer
Explanation: Tropospheric layer extends up to 17km in altitude at the equator and is known to contain 80% of the mass of the atmosphere.
10. What does the term “overcast” define?
a) Phenomenon of indirect radiation exposure due to scattering
b) Weather when cloud cover is equal to 8 oktas
c) Phenomenon of indirect radiation exposure due to scattering & Weather when cloud cover is equal to 8 oktas
d) None of the mentioned
View Answer
Explanation: Overcast is a phenomenon where cloud cover is equal to 8 oktas (unit of measurement) and shadow cannot be seen due to indirect radiation caused by scattering.
11. Twinkling of stars is otherwise known as scintillation.
a) True
b) False
View Answer
Explanation: Scintillation or twinkling is the effect of apparent position or brightness of a distant light emitting body (like stars), observed through various layers of the atmosphere.
12. What does ITCZ stand for corresponding to global wind patterns?
a) Inner Tropospheric Convergence Zone
b) Inter Tropical Convergence Zone
c) Inner Tropical Continental Zone
d) Inter Tropical Continental Zone
View Answer
Explanation: Inter Tropical Convergence Zone is the region around the equator where southeast and northeast trade winds meet.
Sanfoundry Global Education & Learning Series – Environmental Science.
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