Question 1

PCBs (polychlorinated biphenyls) were

Accepted Answer

A)  in greatest use in the early 1960s. 
B)  are no longer manufactured or used in the U.S. 
C)  are still entering the environment from previous use. 
D)  remain in the sediments for unknown periods of time. 
E)  All of these are correct. 
A)  in greatest use in the early 1960s. 
B)  are no longer manufactured or used in the U.S. 
C)  are still entering the environment from previous use. 
D)  remain in the sediments for unknown periods of time. 
E)  All of these are correct.

Question 2

Oil spill cleanup techniques are able to recover and remove the majority of spilled oil from the marine environment.

Accepted Answer

A) True 
 B)False

Question 3

Addition of harmful substances to the environment is called eutrophication.

Accepted Answer

A) True 
 B)False

Question 4

High concentrations of toxic heavy metals in estuaries are most likely to be found in

Accepted Answer

A)  the water of the estuary. 
B)  air above the estuary. 
C)  the sediments. 
D)  the water of the adjacent ocean. 
E)  the air above the adjacent land. 
A)  the water of the estuary. 
B)  air above the estuary. 
C)  the sediments. 
D)  the water of the adjacent ocean. 
E)  the air above the adjacent land.

Question 5

The ecology of San Francisco Bay is being disrupted by

Accepted Answer

A)  Asian clams. 
B)  comb jellies. 
C)  European green crabs. 
D)  Asian clams and European green crabs. 
E)  Asian clams, comb jellies, and European green crabs. 
A)  Asian clams. 
B)  comb jellies. 
C)  European green crabs. 
D)  Asian clams and European green crabs. 
E)  Asian clams, comb jellies, and European green crabs.

Question 6

Over 50% of the world's coastal mangroves forests have been destroyed.

Accepted Answer

A) True 
 B)False

Question 7

The number of large oil spills in the marine environment has decreased over the last 45 years.

Accepted Answer

A) True 
 B)False

Question 8

Plastics in the sea are a hazard to marine life because

Accepted Answer

A)  they ensnare animals. 
B)  they are eaten by animals. 
C)  their colors confuse animals. 
D)  they ensnare animals and they are eaten by animals. 
E)  they ensnare animals, they are eaten by animals, and their colors confuse animals. 
A)  they ensnare animals. 
B)  they are eaten by animals. 
C)  their colors confuse animals. 
D)  they ensnare animals and they are eaten by animals. 
E)  they ensnare animals, they are eaten by animals, and their colors confuse animals.

Question 9

The number of human-caused oil spills in the ocean have decreased since the 1970s.

Accepted Answer

A) True 
 B)False

Question 10

An example of fishing through the foodweb is

Accepted Answer

A)  successively removing apex predators. 
B)  simultaneously fishing at multiple trophic levels. 
C)  fishing with trawl nets. 
D)  using fish pens for mariculture. 
A)  successively removing apex predators. 
B)  simultaneously fishing at multiple trophic levels. 
C)  fishing with trawl nets. 
D)  using fish pens for mariculture.

Question 11

Ecosystem-based management allows for diverse societal use of fish stocks including all of the following except

Accepted Answer

A)  tourism. 
B)  ecosystem health. 
C)  fishing down the food chain. 
D)  fishing. 
E)  recreation. 
A)  tourism. 
B)  ecosystem health. 
C)  fishing down the food chain. 
D)  fishing. 
E)  recreation.

Question 12

The term "bycatch" refers to

Accepted Answer

A)  all fish caught in nets. 
B)  animals other than fish caught in nets. 
C)  fish that are processed on board the fishing vessel. 
D)  fish other than the targeted species, often thrown away. 
E)  None of these are correct. 
A)  all fish caught in nets. 
B)  animals other than fish caught in nets. 
C)  fish that are processed on board the fishing vessel. 
D)  fish other than the targeted species, often thrown away. 
E)  None of these are correct.

Question 13

Human expansion can lead to altered marine ecosystems by

Accepted Answer

A)  introducing new species. 
B)  conserving biodiversity. 
C)  surveying marine species. 
D)  reducing incidental bycatch. 
A)  introducing new species. 
B)  conserving biodiversity. 
C)  surveying marine species. 
D)  reducing incidental bycatch.

Question 14

There are more than 6,000 marine protected areas (MPAs) worldwide accounting for approximately ______ percent of the world's surface ocean.

Accepted Answer

A)  1 
B)  2 
C)  5 
D)  10 
E)  20 
A)  1 
B)  2 
C)  5 
D)  10 
E)  20

Question 15

A toxicant is a substance that is not normally found in the environment.

Accepted Answer

A) True 
 B)False

Question 16

A toxicant is a substance that is not normally found in the environment.

Accepted Answer

A) True 
 B)False

Question 17

Overfishing did not become an issue until about 100 years ago.

Accepted Answer

A) True 
 B)False

Question 18

Only animals are considered invasive species.

Accepted Answer

A) True 
 B)False

Question 19

Natural mangrove stands provide a coast with

Accepted Answer

A)  protection from waves. 
B)  protection from storms. 
C)  habitats for fish and shellfish. 
D)  protection from waves and protection from storms. 
E)  protection from waves, protection from storms, and habitats for fish and shellfish. 
A)  protection from waves. 
B)  protection from storms. 
C)  habitats for fish and shellfish. 
D)  protection from waves and protection from storms. 
E)  protection from waves, protection from storms, and habitats for fish and shellfish.

Question 20

Hypoxia, or low-oxygen conditions, is generally considered to occur when oxygen in the water drops to ________ ppm.

Accepted Answer

A)  15 
B)  10 
C)  5 
D)  2 
E)  0 
A)  15 
B)  10 
C)  5 
D)  2 
E)  0

PCBs (polychlorinated biphenyls) were

Oil spill cleanup techniques are able to recover and remove the majority of spilled oil from the marine environment.

Addition of harmful substances to the environment is called eutrophication.

High concentrations of toxic heavy metals in estuaries are most likely to be found in

The ecology of San Francisco Bay is being disrupted by

Over 50% of the world's coastal mangroves forests have been destroyed.

The number of large oil spills in the marine environment has decreased over the last 45 years.

Plastics in the sea are a hazard to marine life because

The number of human-caused oil spills in the ocean have decreased since the 1970s.

An example of fishing through the foodweb is

Ecosystem-based management allows for diverse societal use of fish stocks including all of the following except

The term "bycatch" refers to

Human expansion can lead to altered marine ecosystems by

There are more than 6,000 marine protected areas (MPAs) worldwide accounting for approximately ______ percent of the world's surface ocean.

A toxicant is a substance that is not normally found in the environment.

A toxicant is a substance that is not normally found in the environment.

Overfishing did not become an issue until about 100 years ago.

Only animals are considered invasive species.

Natural mangrove stands provide a coast with

Hypoxia, or low-oxygen conditions, is generally considered to occur when oxygen in the water drops to ________ ppm.

The Water Planet

Earth Structure and Plate Tectonics

The Sea Floor and Its Sediments

The Physical Properties of Water

Seawater

The Atmosphere and the Oceans

Ocean Structure and Circulation

The Waves

The Tides

Coasts, Beaches, and Estuaries

The Living Ocean

The Plankton, Energy, and Food Webs

The Nekton: Swimmers of the Sea

The Benthos: Living on the Sea Floor

The Oceans and Climate Disruption

Prologue: The History of Oceanography

Filters

Exam 15: Environmental Issues

PCBs (polychlorinated biphenyls) were

Oil spill cleanup techniques are able to recover and remove the majority of spilled oil from the marine environment.

Addition of harmful substances to the environment is called eutrophication.

High concentrations of toxic heavy metals in estuaries are most likely to be found in

The ecology of San Francisco Bay is being disrupted by

Over 50% of the world's coastal mangroves forests have been destroyed.

The number of large oil spills in the marine environment has decreased over the last 45 years.

Plastics in the sea are a hazard to marine life because

The number of human-caused oil spills in the ocean have decreased since the 1970s.

An example of fishing through the foodweb is

Ecosystem-based management allows for diverse societal use of fish stocks including all of the following except

The term "bycatch" refers to

Human expansion can lead to altered marine ecosystems by

There are more than 6,000 marine protected areas (MPAs) worldwide accounting for approximately ______ percent of the world's surface ocean.

A toxicant is a substance that is not normally found in the environment.

A toxicant is a substance that is not normally found in the environment.

Overfishing did not become an issue until about 100 years ago.

Only animals are considered invasive species.

Natural mangrove stands provide a coast with

Hypoxia, or low-oxygen conditions, is generally considered to occur when oxygen in the water drops to ________ ppm.

The Water Planet

Earth Structure and Plate Tectonics

The Sea Floor and Its Sediments

The Physical Properties of Water

Seawater

The Atmosphere and the Oceans

Ocean Structure and Circulation

The Waves

The Tides

Coasts, Beaches, and Estuaries

The Living Ocean

The Plankton, Energy, and Food Webs

The Nekton: Swimmers of the Sea

The Benthos: Living on the Sea Floor

The Oceans and Climate Disruption

Prologue: The History of Oceanography

Filters