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Oceans
Test Description: Oceans
Instructions: Answer all questions to get your test result.
1) Fish use their gills to get _____ from the water.
A
oxygen
B
plankton
C
carbon dioxide
D
salt
2) Which type of aquatic ecosystem is formed from the calcium carbonate shell secreted by animals?
A
lake
B
coral reef
C
seamount
D
estuary
3) Animals with gills live ________
A
in trees
B
on mountains
C
in water
D
in deserts
4) Which feature is needed in order for a pond animal to obtain oxygen from the water?
A
fins
B
lungs
C
scales
D
gills
5) The part of the ocean where the water is too deep for sunlight to penetrate to the bottom is called the _____zone.
A
benthic
B
aquatic
C
littoral
D
eutrophic
6) In an ocean ecosystem, the greatest diversity of organisms is found:
A
at the surface
B
in a coral reef
C
near the bottom
D
near a shoreline
7) Which of the following would be found at the bottom of an aquatic food chain
A
phytoplankton
B
minnows
C
coral
D
water
8) Aquatic ecosystems are classified based on the salinity of the water. These two ecosystems are:
A
brackish and marine
B
wetland and freshwater
C
freshwater and marine
D
marine and swamp
9) Which aquatic biome consists of a mix of fresh water and salt water?
A
a lake
B
a mountain stream
C
an estuary
D
the ocean
10) What marine ecosystem is built by tiny animals called polyps?
A
mangrove swamp
B
coral reef
C
ocean
D
estuary
*select an answer for all questions
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