1.
How can gasoline enter into the water supply?: Underground gas tanks that leak
2.
List examples of nonpoint source pollution.: Lawns, construction sites, roads, rain, and snow
3.
List examples of point source pollution.: Drainpipes and ditches
4.
List sources of sediment that enter the water.: Farm fields, construction sites, cleared forests, and grazing land for livestock.
5.
List the elements in fertilizers that help plants grow.: Nitrogen and phosphorous
6.
List the three phases of sewage treatment.: Primary, secondary, and tertiary
7.
List two categories of chemicals from agriculture and lawn care that contribute to water pollution.: Pesticides and fertilizers
8.
Name the metals that can be poisonous in even small amounts.: Mercury, lead, nickel, and camium
9.
What are products that would contain metals.: Paints and stereos and sometimes batteries
10.
What are the affects of heavy metals in drinking water?: Nervous system damage
11.
What are the health affects of gasoline in drinking water?: Can cause cancer
12.
What are the major environmental issues related to fertilizer use?: Algal bloom
13.
What is another name for a sewage treatment plant?: Waste water treatment plant
14.
What is the largest category source of pollution in the United States.: Sediment
15.
What is the major contributor to metal pollution in the environment?: Mining
16.
What is the purpose of a fertilizer?: Help plants grow
17.
Which general source can be controlled or treated before the water is released?: Point source pollution
18.
Which general source of pollution enters water from a large area.: Nonpoint source pollution
19.
Which general source of pollution enters water from a specific location?: Point source pollution
20.
Which of the two general sources is the largest source of water problems in the United States.: Nonpoint source pollution
21.
Which stage or step of sewage treatment adds bacteria?: Secondary
22.
Which stage or step of sewage treatment are large solids removed with a metal screen?: Primary
23.
Which stage or step of sewage treatment are the smallest solids removed?: Secondary
24.
Which stage or step of sewage treatment disease causing organisms are removed?: Tertiary
25.
Which stage or step of sewage treatment removes nitrogen and phosphorous?: Tertiary
26.
Why is heat considered a water pollutant?: Warm water contains less oxygen than cooler water, and organisms that live in the water are sensitive to temperature changes
