Multiple choice

Which of the following is classified under sedimentary cycles?

  1. Sulphur cycle

  2. Oxygen cycle

  3. Carbon cycle

  4. Nitrogen cycle

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A Correct answer
Explanation

In sedimentary cycles, the elements main reservoir pool, is lithosphere and the biogenetic materials involved in circulation, are non-gaseous. The sedimentary cycles are usually very slow, as the elements may get locked up in rocks, and go out of circulation, for long periods.Though sulphur occurs in gaseous form, as hydrogen sulphide (H2S) and sulphur dioxide (SO2), the residence time of sulphur in atmosphere is very small (about 4 x 1010 kg) and its main reservoir pool is the soil (contains about 4 x 1018 kg in the form of sulphates, sulphides and organic sulphur). So, sulphur cycle, is classified under sedimentary cycles.