Biology
Grade-7
Easy

Question

Water is allowed to stand in huge tanks so that suspended impurities settle down. This process is called ___________. (Analyze)

  1. Aeration
  2. Distillation
  3. Sedimentation
  4. Filtration

hintHint:

The process is based on the effect of gravity.

The correct answer is: Sedimentation


    • Sedimentation is a part of waste water treatment process
    • During the process, the waste water is allowed to stand still for certain period of time so that the solids get deposited at the bottom of the tank
    • Sedimentation occurs due to effect of gravity
    • The deposited solids are called sediments

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