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Name:
Date:
Polluting the Water
Four Types of Pollutants
Introduction
• Pollutants enter the watershed ___________________________________
__________________ (__________________________________)
or __________________________________________________________
(________________________________).
• Regardless of the manner in which they enter the water, _____________
_______________________: ___________________________________
___________________________________________________________ .
Toxic Pollution
• Toxic pollution includes ______________________________________
___________________________________________________________.
• When a body of water has a high level of toxic pollution, fishing for the
purpose of human consumption is banned. ________________________
____________________________________________________________
____________________________________: ______________________.
• Examples of toxic pollution include pesticides and herbicides; gasoline, oil,
and other automotive products; household cleaning products; paints and
solvents; battery acid; industrial waste chemicals; and toxic substances in
car exhaust and solid waste incinerator smoke.
Sediment Pollution
• Sediment pollution _________________________________________
_____________________________. It comes from areas where _______
___________________________________________________________.
• Sediment causes ________________________ for aquatic organisms.
First, particles of sediment are ________________________________.
The resulting cloudiness________________________________________
___________________________________________________________.
• Second, as sediment particles settle, they _________________________
____________________________________________________________
___________________________________________________________.
• Sediment also __________________________ of fish, crabs, and other
underwater organisms. Sediment ________________________________,
preventing them from hatching, and when it covers an oyster bed, _____
_________________________________________.
Global Geography 12
Name:
Date:
Nutrient Pollution
• Nutrient pollution ___________________________________________
such as nitrogen and phosphorus. Living things cannot survive without
nutrients, but _______________________________________________.
An overabundance of nutrients leads to ___________________________,
particularly of algae and vascular plants.
• This causes two problems. First, water clouded with _________________
___________________________________________________________.
• Second, when those plants die, __________________________________
___________________________________. This deprives underwater
animals of ___________________________________________________,
creating ______________________.
• Sources of nutrient pollution include overflow from sewage treatment
plants, leakage from improperly maintained septic systems, discharge
from factories, and automobile exhaust. Examples of nutrient pollutants
include fertilizers, animal manure, discharge from boat toilets, and
household detergents.
Bacterial Pollution
• Bacterial pollution occurs when _______________________________.
There are many ______________________________________________.
• Even harmful bacteria in small amounts are safe. In larger concentrations,
however, ___________________________________________________
___________________________________________________________.
• Some sources of bacterial pollution include overflow from sewage
treatment plants, leakage from improperly maintained septic systems,
animal manure, and discharge from boat toilets.
Global Geography 12