Environmental Science

61.	Global warming is caused by-
a.	GHGs
b.	CFCs
c.	CH₄
d.	NO₂ Option”A” is correct Global warming is caused by GHGs(Green house gases).

62.	Warming in the stratosphere is mainly caused by:
a.	Absorption of ultraviolet radiation by ozone
b.	Release of latent heat energy during condensation
c.	Chemical reactions between ozone and chlorofluorocarbons
d.	Frictional heating caused by meteorites Option”A” is correct The Primary Cause of Global Warming is Ozone Depletion. Atmospheric temperature decreases with altitude in the troposphere and increases with altitude in the stratosphere.

63.	Major consumer of wood from forest is ___________
a.	Thermal Power Plant
b.	Paper Industry
c.	Chemistry Industry
d.	none Option”B” is correct

64.	_________ is the 12th Mega Biodiverse Country in the world.
a.	India
b.	America
c.	China
d.	Sri Lanka Option”A” is correct India is one of the 12 mega biodiversity countries in the world.

65.	Which plants die after flowering?
a.	Lotus
b.	Bamboo
c.	Chrysanthemum
d.	Butea Option”B” is correct Bamboo die after flowering.

66.	This holds a planet’s atmosphere close to its surface:
a.	Radiation
b.	Gravity
c.	Cloud cover
d.	Moisture Option”B” is correct Our atmosphere is a mixture of gases that surround Earth. It is kept in place by the pull of Earth’s gravity. If Earth was a much smaller planet, like Mercury or Pluto, its gravity would be to weak to hold a large atmosphere.

67.	During the afternoon the greatest temperature difference between the surface air and the air several meters above occurs on a:
a.	Clear, calm afternoon
b.	Clear, windy afternoon
c.	Cloudy, calm afternoon
d.	Cloudy, windy afternoon Option”A” is correct During the afternoon, the greatest temperature difference between the surface air and the air several meters above the ground occurs on a: clear, calm day.

68.	Ideal conditions for a strong radiation inversion:
a.	Clear, calm, dry, winter night
b.	Clear, calm, moist, summer night
c.	Cloudy, calm, moist, winter night
d.	Cloudy, windy, moist, summer night Option”A” is correct Ideal conditions for a strong radiation inversion: Clear, calm, dry, winter night.

69.	Example of primary pollutant-
a.	SO₂
b.	NO₂
c.	CO
d.	hydrocarbons Option”D” is correct

70.	In a photochemical smog, which gas is an eye and mucous membrane irritant?
a.	SO₂
b.	O₃
c.	CO₂
d.	N₂O Option”D” is correct

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