9. These are chemicals that are detected at low levels but now having an effect on aquatic life a. Chemicals of Emerging Concern c. Hormones b. Antibiotics d. None of these 10.A very low BOD indicates that: a. Contamination is present c. Microorganism actively consumes d. None of these 12. Process whereby coarse matter (floating or out of flowing water with the aid of bars, a. Screening c. Grit chamber b. Microorganisms are dying oxygen 11. Oxygen depletion are caused by all of the following factors except: a. Carbonaceous and nitrogenous waste b. DO in the waste discharge is less discharge c. Photosynthesis of aquatic plants d. Respiration of organisms living in the sediments suspended) of a certain size can be strained fine wars or rocks. b. Communitor d. Clarifier

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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9. These are chemicals that are detected at low levels but now having an effect on aquatic
life
a. Chemicals of Emerging Concern
c. Hormones
10.A very low BOD indicates that:
a. Contamination is present
c. Microorganism actively consumes
b. Antibiotics
d. None of these
b. Microorganisms are dying
d. None of these
oxygen
11. Oxygen depletion are caused by all of the following factors except:
a. Carbonaceous and nitrogenous waste
discharge
c. Photosynthesis of aquatic plants
a. Screening
c. Grit chamber
b. DO in the waste discharge is less
d. Respiration of organisms living in
the sediments
suspended) of a certain size can be strained
12. Process whereby coarse matter (floating or
out of flowing water with the aid of bars, fine wars or rocks.
b. Communitor
d. Clarifier
Transcribed Image Text:9. These are chemicals that are detected at low levels but now having an effect on aquatic life a. Chemicals of Emerging Concern c. Hormones 10.A very low BOD indicates that: a. Contamination is present c. Microorganism actively consumes b. Antibiotics d. None of these b. Microorganisms are dying d. None of these oxygen 11. Oxygen depletion are caused by all of the following factors except: a. Carbonaceous and nitrogenous waste discharge c. Photosynthesis of aquatic plants a. Screening c. Grit chamber b. DO in the waste discharge is less d. Respiration of organisms living in the sediments suspended) of a certain size can be strained 12. Process whereby coarse matter (floating or out of flowing water with the aid of bars, fine wars or rocks. b. Communitor d. Clarifier
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