Q. No.Greenhouse gases
(1) Absorb long wave or infrared radiation from the Earth
(2) Emit the long wave or infrared radiation towards the Earth
(3) Can neither absorb nor emit
(4) Both A and B
(1) Absorb long wave or infrared radiation from the Earth
(2) Emit the long wave or infrared radiation towards the Earth
(3) Can neither absorb nor emit
(4) Both A and B
Which of the following is wrong?
A.Emission of infrared by Earth's Surface
B.Clouds and gases reflect one fourth of incoming solar radiation
C. Carbon dioxide and methane absorb a major fraction of infrared radiation emitted by Earth
D. During the past century, the temperature of Earth has increased by 0.6℃, most of it during the last five decades
What does El Nino effect mean?
(1) Rise in temperature due to global warming going to result in odd climatic changes
(2) Rise in use of chemical fertiliser going to cause metabolic disorder
(3) Rise in use of CFCs going to cause ozone depletion
(4) Rise in use of Plastic going to destroy sea animals
Relative contribution of various greenhouse gases to total global warming will not be
(1) Carbon dioxide-60%
(2) Methane-20%
(3) CFCs-14%
(4) N2O-12%
Ozone
(1) Ozone hole is the area above Antarctica
(2) Ozone layer is the thinnest above Antartica
(3) Ozone thickness is measured in Dobson unit
(4) All of these
Ozone hole over Antarctica develops each year between
(1) Early October and Late December
(2) Late August and Early October
(3) Early August and Late October
(4) Late October and Early December
Bad Ozone
(1) Formed in lower atmosphere
(2) Formed in Troposphere
(3) Harms plants and animals but is not lethal
(4) All of these
Good ozone is
(1) Found in the upper strata of the atmosphere
(2) Found in Stratosphere
(3) Acts as a shield to UV light
(4) All of these
The thickness of ozone is measured in
(1) Dobson units
(2) Decibel
(3) Centi Morgan
(4) Centi meter
UV rays are highly injurious to living organisms
(1) Because DNA and Protein preferentially refract UV light
(2) Because DNA and Protein preferentially radiate UV light in the form of heat energy
(3) Because DNA and Protein preferentially absorb UV light and as a result chemical bonds are broken
(4) Both B and C
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