Multiple Choice
A "clean zone" of water has
A) a high BOD (Biochemical Oxygen Demand) and a high DO (Dissolved Oxygen Level)
B) a low BOD (Biochemical Oxygen Demand) and a high DO (Dissolved Oxygen Level)
C) a low BOD (Biochemical Oxygen Demand) and a low DO (Dissolved Oxygen Level)
D) a high BOD (Biochemical Oxygen Demand) and a low DO (Dissolved Oxygen Level)
Correct Answer:
Verified
Correct Answer:
Verified
Q8: The recovery zone of polluted natural waters
Q9: Acids can enter natural waters due to<br>A)industry,
Q10: Lakes generally evolve naturally over time in
Q11: Cold, clear lakes or streams with few
Q12: Water pollution can be<br>A)biological<br>B)chemical<br>C)biological or chemical<br>D)visible but
Q14: Anaerobes are forms of life which<br>A)can live
Q15: Sediment (soil particles) in natural waters can<br>A)
Q16: The zone of the open sea having
Q17: At very low dissolved oxygen (DO) levels
Q18: The amount of oxygen required to decompose