Earth Science Olympiad - Previous Questions 8

Earth Science Olympiad - Previous Questions 8

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1. When the scale height of a minor constituent (e.g., ozone, etc.) is equal to the atmospheric scale height then

the constituent is not well mixed and its mixing ratio is constant with altitude
the constituent is well mixed and its mixing ratio is constant with altitude
the constituent is not well mixed and its mixing ratio varies with altitude
the constituent is well mixed and its mixing ratio varies with altitude

2. The residence time of aerosols increases as a function of altitude. This statement

is true for all types of aerosols
is false for all types of aerosols
is true for sulfate aerosols only
is false for carbonaceous aerosols only

3. The heterosphere is so called because of

varying chemical composition of atmospheric gases in that region
constant chemical composition of atmospheric gases in that region
varying chemical composition of only atmospheric trace gases in that region
constant chemical composition of only atmospheric trace gases in that region

4. Almost all of the Earth’s atmosphere lies in a layer thinner than

10 percent of the radius of the Earth
5 percent of the radius of the Earth
1 percent of the radius of the Earth
25 percent of the radius of the Earth

5. Ozone in the troposphere is called as

good ozone as it absorbs harmful ultraviolet radiation
bad ozone as it causes harmful effects in the atmosphere
good ozone as it reduces pollution
good ozone as it reduces global warming

6. Geopotential height is

nearly identical to height in the heterosphere
nearly identical to height in the homosphere
nearly identical to height in homosphere and heterosphere
nearly identical to height in the tropics

7. The peak wavelength at which Sun radiates emission is

0.48 μm
0.68 μm
10.0 μm
1.0 μm

8. Mercury in a barometer should raise to what height to balance an atmospheric pressure of 1000 mbar (density of mercury is 13558 km m) ?

0.71 m
0.95 m
8 km
10 m

9. 50% of the atmosphere lies below an altitude of

100 km
48 km
18 km
5.5 km

10. The density of dry air at 300K and 1010 mbar is (R’, the gas constant, is 2.8704 mkgK)

1.5 kg m^-3
1.0 kg m^-3
1.2 kg m^-3
100 kg m^-3