Which of the following statements is not true?

Rivers move faster, and their oxygen levels inc., as they near the ocean.

Artic ecosystems are considered marine because

phytoplankton form the basis of the food web

organisms that are able to swim and move independently of water currents.

are ecosystems where both fresh water and salt water are present

Most pollutants that enter estuaries break down over time, yet they are still considered a problem because

the volume of the pollutants more than the time factor that harms estuaries

What is the benthic zone?

The lowest level of a large body of water

Which of the following is not characteristic of salt marshes and mangrove swamps?

Both are dominated by marsh grasses.

Coral reefs are intricately shaped rocklike structures that are formed as a result of

the secretion of calcium carbonate by tiny marine animals

What are eutrophic lakes?

Lakes that are shallow,murky,warm and nutrient-rich

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Environmental Science Chp. 7 2024

30 termsStudBud Administration365 plays

Aquatic Ecosystems Review

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Questions 30

Answers

1
The types of organisms found in a pond or lake depend on...
temperature of the water
all of the above
presence of nutrients
amount of sunlight
2
Which organism produces most of the food in an aquatic ecosystem?
fish
zooplankton
bacteria
phytoplankton
3
What are the two main types of freshwater wetlands?
marshes and swamps
littoral and benthic zones
lakes and ponds
rivers and streams
4
Which of the following statements is not true?
Rivers move faster, and their oxygen levels inc., as they near the ocean.
Lakes may contain a region that receives little sunlight.
Swamps are dominated by woody shrubs and water-loving trees.
Wetlands help remove pollutants from water.
5
What causes the most coastal pollution in the US?
temperature changes
industrial waste and sewage
lakes and ponds
overfishing
6
The majority of marine organisms are found in
shallow, coastal waters
hydrothermal vents.
deep ocean waters.
salt marshes.
7
In which of these following can we find Brackish water ecosystems?
Coastal shallows
Deltas
Wetlands
Streams
8
Which of the following is a threat to coral reefs?
oil spills
pesticides
sewage
all of the above
9
Artic ecosystems are considered marine because
sunlight is limited
phytoplankton form the basis of the food web
they contain enormous amount of frozen sea water
they are inhabited by few organisms
10
Which of the following are threats to Ocean ecosystems
All of the above
Nutrient runoff and Industrial waste discharges
sewage and algal Blooms
overfishing and entanglement of marine mammels in trawl nets
11
The Florida Everglades
is the largest freshwater marsh in the United States
protects threatened and endangered wildlife
All of the above
provides habitat for migratory birds
12
In the ___ zone, life is diverse and abundant.
Benthic
Littoral
Plankton
Eutrophic
13
As they flow down the mountain to flatter ground, rivers generally become....
all of the above
slower
wider
warmer
14
In the _______ zone, the water is cool and dark.
plankton
eutrophic
benthic
littoral
15
Nekton are...
nitrogen fixating plankton
off brand plankton
organisms that are able to swim and move independently of water currents.
Bacteria that grows on coral
16
Which of the following actions is an example of how humans affect wetlands?
draining a wetland to create farmland
clearing a wetland to build a housing development
using a wetland as a landfill
all the above
17
Estuaries:
are always saltwater ecosystems
prevent the development of salt marshes
are ecosystems where both fresh water and salt water are present
are always freshwater ecosystems
18
Most pollutants that enter estuaries break down over time, yet they are still considered a problem because
the pollutants eventually concentrate in the ocean.
the pollutants break down into still more dangerous toxins.
the volume of the pollutants more than the time factor that harms estuaries
None of the above
19
What is the mouth of a river?
Where a river empties or ends
The water
Where it begins- it's source
The sandy bottom of the river
20
What other plankton do zooplankton feed on?
Diatoms
Copepods
Phytoplankton
Krill
21
What is the benthic zone?
A brightly lit area
The lowest level of a large body of water
The part of a large body of water that has abundant life
The highest level of a large body of water
22
Which of the following correctly lists types of organisms in aquatic ecosystems from shallowest to deepest?
plankton, nekton, benthos
benthos, plankton, nekton
plankton, benthos, nekton
benthos, nekton, plankton
23
Estuaries are very productive ecosystems because they receive fresh nutrients from
streams and springs
rivers and oceans
marshes and swamps
lakes and ponds
24
Which of the following is not characteristic of salt marshes and mangrove swamps?
Both are found along coastal areas.
Both are threatened by development.
Both are dominated by marsh grasses.
Both provide habitats for wildlife.
25
Which ecosystem has the highest level of salinity
brackish marsh
pond
salt marsh
river
26
What is a river source?
the journey it goes on
the end
where it sheds sand, stones etc.
the headwaters
27
Coral reefs are intricately shaped rocklike structures that are formed as a result of
the gradual accumulation and fusion of skeletons of fish
minerals that are washed from land ecosystems and build up
the secretion of calcium carbonate by tiny marine animals
volcanic activity that is common in tropical marine eco.
28
Which aquatic ecosystem is adversely affected by runoff?
rivers
estuaries
all of these
oceans
29
Which of the following is not an environmental function of wetlands?
trapping carbon that would be released into the air
controlling floods
absorbing and removing pollutants from water
increasing runoff
30
What are eutrophic lakes?
Deep sewage into streams and lakes
Clear,cold, nutrient-poor lakes
Lakes that are shallow,murky,warm and nutrient-rich
All the above

Environmental Science Chp. 7 2024 Flashcards | StudBud