1. Identify the non Green - House Gas from the following?
[A]Carbon monoxide
[B]Methane
[C]Sulphur hexafluoride
[D]Nitrous oxide
2. In nitrogen cycle, soil nitrates are transformed into free nitrogen by _________________________.
[A]Denitrifying bacteria
[B]Nitrifying bacteria
[C]Ammonifying bacteria
[D]Denitrifying bacteria and Ammonifying bacteria
3. Which type of rock would you most likely find buried deep in the earth?
[A]Sedimentary rock
[B]Igneous rock
[C]Granite
[D]Metamorphic rock
4. The unit to measure electric power is _______________.
[A]Ampere
[B]Watts
[C]Ohms
[D]Decibels
5. Which one of the following is a useful biological indicator of sulphur-dioxide pollution?
[A]Algal blooms
[B]Lichens
[C]Bryophytes
[D]Pseudomonas
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