Water Pollution Can Be

Q7: Lead enters drinking water primarily from<br>A)improperly discarded

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

Q13: A "clean zone" of water has<br>A)a high

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