Environmental Science Water +

Question 1

The approach to estimating marine fish populations most beneficial to fish populations

Accepted Answer

optimum sustained yield

Question 2

All of the following threaten the survival of coral reefs except

Accepted Answer

predation by sharks.

Question 3

Rooted freshwater plants cannot live below

Accepted Answer

B, the limnetic zone

Question 4

All of the following organisms would be considered part of the benthos except

Accepted Answer

cod.

Question 5

Which of the following is an economic approach to reducing overfishing?

Accepted Answer

eliminating fishing subsidies

Question 6

Most of the wetlands that are lost are used for

Accepted Answer

agriculture.

Question 7

The ecosystems with the world's highest net primary productivities per unit area are found in

Accepted Answer

the coastal zone

Question 8

Major water problems of the western United States include

Accepted Answer

chronic drought and insufficient runoff.

Question 9

The world's largest hydroelectric power system is found on the

Accepted Answer

Columbia River

Question 10

Lake overturns bring

Accepted Answer

oxygen to the lake bottom and nutrients to the surface.

Question 11

The United States has lost more than ____ of its coastal and inland wetlands since 1900.

Accepted Answer

50%

Question 12

Which of the following countries has a significant whaling industry and whale meat market?

Accepted Answer

Japan

Question 13

What are cetaceans?

Accepted Answer

whales and porpoises

Question 14

What are the high seas?

Accepted Answer

ocean areas beyond any country's legal jurisdiction

Question 15

"Mitigation banking" refers to

Accepted Answer

creating or restoring as much wetlands as are destroyed.

Question 16

In the US, over half of the fish extinctions in the last century were driven to extinction by

Accepted Answer

alien species

Question 17

Salmon ranching results in all of the following except

Accepted Answer

increasing ladders and bypasses for migrating salmon

Question 18

What % of fish spawn in the world's coral reefs, mangrove swamps, coastal wetlands, or rivers?

Accepted Answer

90

Question 19

Potential for conflict over water resources among the following pairs of countries except

Accepted Answer

Turkey and Egypt.

Question 20

The Columbia River is located in the

Accepted Answer

Pacific Northwest

Question 21

Which of the following allows polluters to buy and sell the right to pollute?

Accepted Answer

Cap and trade programs

Question 22

Thriving coral reefs require

Accepted Answer

dissolved oxygen and nutrients.

Question 23

The ocean zone that covers the continental shelf is the

Accepted Answer

coastal zone

Question 24

When it is no longer profitable to fish for an affected species, ___ is said to have occurred

Accepted Answer

commercial depletion

Question 25

In temperate and tropical regions, water temperature becomes rapidly colder as a function of

Accepted Answer

depth in the surface zone.

Question 26

A frog's (tadpoles/ adults) life would be least likely to be disrupted by a change in the

Accepted Answer

D, the benthic zone

Question 27

Which is not a direct threat to six of the world's seven major sea turtle species?

Accepted Answer

invasive species introduction into habitat

Question 28

Estuaries and coastal wetlands are important for all of the following reasons except

Accepted Answer

providing coral for limestone production & the tourist trade

Question 29

Which of the following trees is characteristic of tropical coastal wetlands?

Accepted Answer

mangrove

Question 30

Which of the following uses tends to consume the smallest amount of water?

Accepted Answer

public use

Question 31

Throughout the world, the most water is used for

Accepted Answer

irrigation.

Question 32

ecosystem rehabilitation and salmon restoration on the Columbia River includes all except

Accepted Answer

releasing juvenile salmon at mouth of the Columbia River.

Question 33

Why does eating tuna put you at risk?

Accepted Answer

toxins may bioaccumulate in their tissue, making you sick

Question 34

Freshwater systems are mostly threatened by

Accepted Answer

people seeking homes/recreation places near lakes & streams

Question 35

Aquatic ecosystems provide all of the following ecological services except

Accepted Answer

pharmaceuticals

Question 36

Populations of organisms living in aquatic life zones may be limited by

Accepted Answer

all of the other answers

Question 37

Which of the following statements is false?

Accepted Answer

Groundwater is stationary and does not move.

Question 38

Porous water-saturated layers of underground rock are known as

Accepted Answer

aquifers

Question 39

Which is not one of the reasons that protecting aquatic biodiversity especially difficult?

Accepted Answer

Lack of public support for protection

Question 40

On a fishing boat, someone catches a swordfish. This species is member of the

Accepted Answer

nekton.

Question 41

Agency responsible for undoing the development they have done to the Everglades since the 1940s

Accepted Answer

U.S. Army Corps of Engineers

Question 42

What is the largest wetlands restoration project?

Accepted Answer

the Everglades

Question 43

Which of the following is true?

Accepted Answer

Polar areas lack a pycnocline.

Question 44

In which zone of a river would you most expect to find plants adapted to attach to rocks?

Accepted Answer

first

Question 45

Which of the following is a commonly cultivated aquaculture crop?

Accepted Answer

oysters

Question 46

Aquatic ecosystems provide all of the following ecological services except

Accepted Answer

pharmaceuticals

Question 47

All of the following are considered benthos except

Accepted Answer

cod

Question 48

The pair of mallard ducks would be most likely to be disrupted by a change in the

Accepted Answer

A and B, littoral or limnetic zones

Question 49

Activities allowed in the national Wild and Scenic Rivers System include all except

Accepted Answer

motor boating

Question 50

How would you classify a new species of algae found on the surface of a coastal zone?

Accepted Answer

phytoplankton

Question 51

How would you classify a swordfish?

Accepted Answer

nekton

Question 52

The major types of flora and fauna found in aquatic ecosystems are determined primarily by

Accepted Answer

light

Question 53

A new diatom is classified as phytoplankton. Evidence is because the diatom was found in the

Accepted Answer

bathyl zone

Question 54

The dams on the Columbia River did all of the following except

Accepted Answer

increase the salmon populations

Question 55

What happened at Love Canal, NY?

Accepted Answer

Buried chemical waste led to birth defects and cancer

Question 56

The largest use of water in the western United States is

Accepted Answer

irrigation.

Question 57

Approximately ____% of earth's water supply is available to us as liquid freshwater.

Accepted Answer

0.02

Question 58

Oceans cover about ___ of the earth's surface.

Accepted Answer

70%

Question 59

Estuaries exhibit

Accepted Answer

variable temperature and salinity

Question 60

Under the International Whaling Commission's ban, who is still allowed to harvest whales?

Accepted Answer

Eskimos

Question 61

Where is most of the marine biodiversity found?

Accepted Answer

coral reefs

Question 62

Which of the following illustrations does not match the accompanying ecological concept.

Accepted Answer

Dissolved O2 is limiting factor in upper layer of a lake.

Environmental Science Water +

Questions 62

Environmental Science Water +

Questions 62