Why does a plume of contamination spread out (become wider)away from the source of contamination?
A)Because the water flows faster and faster
B)Because of diffusion of the contamination and mixing of contaminated and uncontaminated water
C)Does not spread out away from the source
D)Will only spread out if it is close to a cone of depression

Question

Why does a plume of contamination spread out (become wider)away from the source of contamination? 
A)Because the water flows faster and faster 
B)Because of diffusion of the contamination and mixing of contaminated and uncontaminated water 
C)Does not spread out away from the source 
D)Will only spread out if it is close to a cone of depression

Quizplus · Accepted Answer

As water flows away from the source of contamination, there is diffusion of the contaminants into the surrounding water and mixing with uncontaminated water, causing the plume to become wider. The flow rate of the water may also play a role, but diffusion is the main reason for spreading.

Why Does a Plume of Contamination Spread Out (Become Wider)away