Water Ecosystems Question Preview (ID: 12553)
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What is the largest ecosystem on the planet?
a) grassland
b) tundra
c) ocean
d) desert
Approximately how much of the planet is covered in water?
a) one half
b) two-thirds
c) one-fourth
d) three-fourths
What is the intertidal zone?
a) where the ocean meets fresh water.
b) where the ocean meets the land.
c) where the ocean meets a tide.
d) where the ocean meets a reef.
What is an estuary?
a) where a freshwater river runs into an extension of the ocean.
b) where a freshwater river runs into an extension of a lake
c) where a freshwater river runs into land
d) where a freshwater river runs into another rive
Protists are the primary producers in an ocean. This would be an example of what factor?
a) food production
b) abiotic
c) biotic
d) temperature
Where does most of the primary production occur in an ocean ecosystem?
a) first 50 feet
b) first 200 feet
c) first 300 feet
d) first 100 feet
What percentage of water of Earth is considered freshwater?
a) 2%
b) 3%
c) 4%
d) 5%
Where is most of the freshwater located on Earth?
a) glaciers and rivers
b) glaciers and lakes
c) glaciers and streams
d) glaciers and aquifers
What percentage of fish species live in freshwater ecosystems?
a) 30%
b) 40%
c) 45%
d) 35%
___________________ are freshwater ecosystems with high biodiversity that are also declining in numbers.
a) Lakes
b) Oceans
c) Wetlands
d) Rivers
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