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WAEC Biology 1999 Question 39

Question 39

Ecosystem and Ecological Factors

The secchi disc is used to measure

  1. A.speed of flow of water
  2. B.specific gravity of water
  3. C.turbidity of water
  4. D.depth of water
Show the answer and explanation

Answer: C (turbidity of water)

Explanation

The depth at which the black-and-white Secchi disc disappears shows how cloudy (turbid) the water is.