LIS Test

Question 1

Order of Events leading to hypoxia

Answer 1

1. Spring rains cause combined sewer overflow and runoff of excess nitrogen.
2. Excess nitrogen in the water causes an algal bloom.
3. Bacteria consume the dead algae and the oxygen in the water.
4. Dissolved oxygen levels become low, fish leave, and less mobile animals weaken or die.

Question 2

Floatables

Answer 2

Can choke or tangle animals; Comes from blown over

garbage cans and illegally dumped garbage

Question 3

Heavy Metals

Answer 3

Harmful at low concentrations; Found in paint, gasoline and
plumbing; Can accumulate in animal flesh and sediments

Question 4

Pathogens

Answer 4

Virus, bacteria, or other microorganism that causes disease

Question 5

Pesticides

Answer 5

Chemical used to kill bothersome plants and animals

Question 6

Estuary

Answer 6

A partly enclosed body of water where fresh & salt water mix

Question 7

Low-Energy Shoreline

Answer 7

The force of wind & waves reduced by the presence of land

Question 8

Watershed

Answer 8

Area that drains into a stream, river, lake, estuary or ocean

Question 9

Hypoxia

Answer 9

Low dissolved oxygen levels

Question 10

A construction site causes…

Answer 10

Sediments muddy up the Sound

Question 11

Trash on land causes…

Answer 11

Floatables choke fish and birds

Question 12

Sewage spills cause…

Answer 12

Coliform and other pathogens are in the water

Question 13

Increased nutrients; from chemical fertilizers

Answer 13

Algal bloom and hypoxia

Question 14

Producer example

Answer 14

Green plant

Question 15

Consumer example

Answer 15

omnivore

Question 16

Decomposer example

Answer 16

Bacteria

Question 17

Plant Influent

Answer 17

The water comes from sanitary sewers & enters the plant

Question 18

Bar Screens

Answer 18

Removes items larger than .75 inches – so pipes don’t get clogged

Question 19

UV Disinfection

Answer 19

After this process pathogens can no longer reproduce

Question 20

Effluent Discharge

Answer 20

Cleaned water discharges into the East Branch of Stamford Harbor

Question 21

Flow

Answer 21

Measure of the water so plant can operate efficiently

Question 22

Biology Reactors

Answer 22

Bacteria are given oxygen

Question 23

Primary Clarifiers

Answer 23

Primary Sewage Treatment

Question 24

Solids Processing

Answer 24

Solids are dewatered

Question 25

Discharge from the Purdue Chicken East Coast processing plant

Answer 25

Example of Point Source Pollutants

Question 26

Runoff of nutrients from lawn fertilizers

Answer 26

Example of Non-Point Source Pollutants

Question 27

Picnic garbage in a park.

Answer 27

Example of Non-Point Source Pollutants

Question 28

Discharge from the local sewage treatment plant

Answer 28

Example of Point Source Pollutants

Question 29

Herbivores

Answer 29

only eat plants