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