Author Question: Identify kinds of contaminants that we normally find in the water of our lakes and rivers. What ... (Read 328 times)

viki · **on:** Jul 21, 2018

Identify kinds of contaminants that we normally find in the water of our lakes and rivers.

What will be an ideal response?

Question 2

Describe the relationship between the natural water (hydrologic) cycle and the human water cycle.

What will be an ideal response?

stillxalice · **Reply #1 on:** Jul 21, 2018

Answer to Question 1

Three kinds of contaminants are normally found in almost all naturally occurring water: chemical impurities,
biological impurities, and turbidity

Answer to Question 2

Each year about 119,000 cubic miles of water enters the water cycle through evaporation and falls to the earth in
the form of precipitation. Of that amount, humans use about 700 cubic miles of water annually. The movement
of water through most of this process occurs without human intervention. That is the natural water cycle. When
humans divert part of the water for their own use, the diverted water enters the human water cycle. Even though we
say that humans use 700 cubic miles of water annually, practically none of the water is used up because most of it is
returned to the natural water cycle immediately and almost all of the rest eventually moves back into the water cycle.