Author Question: In terms of the total global supply of water, how much of it is in circulation at any one time? ... (Read 112 times)

ahriuashd · **on:** Jul 13, 2018

In terms of the total global supply of water, how much of it is in circulation at any one time?

A) None of it
B) A small percentage
C) Half of it
D) Most of it
E) Impossible to estimate

Question 2

Biological water (i.e., water in living organisms) constitutes what percentage of water in the Earth system?

A) Less than 1 percent
B) 10 percent
C) 20 percent
D) 30 percent
E) Impossible to estimate