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- 1. Multiple Choice
Estuaries are productive ecosystems because they constantly receive nutrients from
rivers and oceans
coral reefs
lakes and ponds
photosynthesis
- 2. Multiple Choice
Which of the following is the BEST list of the factor(s) that influence(s) where an organism lives in an aquatic ecosystem?
sunlight and sediment
temperature, sediment, and nutrient availability
sunlight, nutrient availability, and temperature
temperature
- 3. Multiple Choice
In which of the following aquatic ecosystems are both littoral and benthic zones most likely found?
coral reef
stream
shallow pond
lake
- 4. Multiple Choice
What is the source of most ocean pollution?
activities on land
climate changes
aquatic animals
aquatic plants
- 5. Multiple Choice
Estuaries
are always saltwater ecosystems
are always freshwater ecosystems
are ecosystems where both fresh water and salt water are present
prevent the development of salt marshes
- 6. Multiple Choice
One way in which wetlands control flooding is by
filtering out water pollutants
absorbing water from rivers
providing habitats for migratory wildlife
reducing the amount of carbon dioxide released into the air
- 7. Multiple Choice
Which of the following is an example of a marine (saltwater) ecosystem?
coral reef
pond
lake
stream
- 8. Multiple Choice
Bottom dwelling organisms are associated with which term?
plankton
nekton
phytoplankton
benthos
- 9. Multiple Choice
Free-swimming organisms are associated with which term?
phytoplankton
zoo plankton
nekton
benthos
- 10. Multiple Choice
Swamps are commonly found on
rocky hillsides
flat, poorly drained land
mountain peaks
bottoms of lakes or ponds
- 11. Multiple Choice
What are the two main types of freshwater wetlands?
lakes and ponds
rivers and streams
littoral zones and benthic zones
marshes and swamps
- 12. Multiple Choice
Which ecosystem has the highest level of salinity?
salt marsh
brackish marsh
river
pond
- 13. Multiple Choice
Which of the following is NOT one of the two types of aquatic ecosystems?
freshwater ecosystem
benthic ecosystem
marine ecosystem
- 14. Multiple Choice
Which of the following is NOT one of the characteristics used to classify freshwater ecosystems?
temperature
depth of water
speed of water flow
availability of minerals, sunlight, and oxygen
- 15. Multiple Choice
Which zone is nutrient-rich, near the shore, and has abundant and diverse aquatic life?
benthic
eutrophic
littoral
- 16. Multiple Choice
Areas of land, with special soils and plants, that are covered with fresh water for at least part of the year are known as
eutrophic zones
lakes
ponds
wetlands
- 17. Multiple Choice
Where are most wetlands found in the USA?
northwest
southwest
northeast
southeast
- 18. Multiple Choice
How are organisms in an aquatic ecosystem grouped?
size and shape
the food they eat
how they reproduce
location and adaptations
- 19. Multiple Choice
Eutrophic lakes are described as
lakes that are nutrient poor
lakes that are rich in nutrients and all types of life
lakes with excessive nutrients, large amounts of algae, and little oxygen
lakes that have a mixture of fresh and salt water
- 20. Multiple Choice
The mixture of saltwater and freshwater in an estuary is called __________________ water.
brackish
semi-salty
partially-salty
sorta-salty
- 21. Multiple Choice
All of the following are examples of freshwater ecosystems EXCEPT ________________.
ponds
Estuaries
lakes
rivers
- 22. Multiple ChoiceOrganisms in estuaries must be able to survivefrequent dry conditionshigh windschanging salt levels
- 23. Multiple Choice
Aquatic life is abundant, diverse, and full of sunlight at which zone?
littoral zone
benthic zone
limnetic zone
- 24. Multiple Choice
An increase in the amount of nutrients in an aquatic ecosystem so that algae is plentiful and takes over, bacteria feed on decomposing organisms, oxygen levels drop, and many organisms die
Eutrophication
Zootrophication
Overfishing
Swamping
- 25. Multiple ChoiceWhat are tiny organisms that float near the surface of the water?planktonorganismsabiotic factorinsects
- 26. Multiple ChoiceThe _________ zone is the ocean floor.intertidalneriticoceanicbenthic
- 27. Multiple ChoiceThe deepest parts of the benthic zone do not get any _________.sunlightfoodfishchemicals
- 28. Multiple ChoiceAn area where fresh water from streams and rivers spills into the ocean is called an _____________.planktonestuarysargassumscoral reefs
- 29. Multiple Choice
Where are coral reefs found?
Polar waters
temperate, mid-latitude waters
tropical waters
only near volcanos
- 30. Multiple Choice
Which of the following is not an environmental function of wetlands?
increasing runoff
absorbing and removing pollutants from water
trapping carbon that would otherwise be released into the air
controlling floods
- 31. Multiple Choice
Estuaries are very productive ecosystems because they receive fresh nutrients from
lakes and ponds
rivers and oceans
marshes and swamps
streams and springs
- 32. Multiple Choice
Estuaries
are always saltwater ecosystems
are always freshwater ecosystems
are ecosystems where both fresh water and salt water are present
prevent the development of salt marshes
- 33. Multiple Choice
The arrangement of organisms in the open ocean is determined by the
increase in salt content from shallow to deep waters
size of the benthic zone, where photosynthesis occurs
amount of nutrients and sunlight that are available
distribution of zooplankton
- 34. Multiple Choice
Coral reefs are intricately shaped rocklike structures that are formed as a result of
volcanic activity that is common in tropical marine environments
the gradual accumulation and fusion of skeletons of bony fish
the secretion of calcium carbonate by tiny marine animals
minerals that are washed from land ecosystems and build up
- 35. Multiple Choice
Which of the following is not characteristic of salt marshes and mangrove swamps?
Both provide habitats for wildlife
Both are dominated by marsh grasses
Both are found along coastal areas
Both are threatened by development
- 36. Multiple Choice
Why doesn’t photosynthesis occur in deep ocean water?
The water temperature is too cold
There is no sunlight
There are not enough nutrients
The salinity level of the water is too high
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