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Environmental Science

Environmental Science
Which of the following zones in a lake suffers from lack of light and therefore limited photosynthesis is able to take place?

Profundal
Euphotic
Pelagic
Littoral

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Environmental Science
The ratio of the mass of water vapour in a given volume (parcel) of air to the mass of the remaining dry air describes the:

Absolute humidity
Relative humidity
Dew point
Mixing ratio

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Environmental Science
The pyramid of numbers in a single tree is

None of these
Spindle shaped
Upright
Inverted

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Environmental Science
The planet with a strong greenhouse effect, whose surface temperature averages 480oC (900oF) is:

Mars
Earth
Pluto
None of these
Venus

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Environmental Science
A river with high BOD value is

none of these
highly clean
highly polluted
highly productive

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Environmental Science
Which of the following group of gases cause photochemical smog?

Ozone, PAN and CO
HC, NO and PAN
O2, PAN, and NO2
O3, PAN and NO2

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