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Hydrosphere Part III Test Review
Test Description: Hydrosphere Part III Test Review
Instructions: Answer all questions to get your test result.
1) Which condition in the ocean is most responsible for an increase in the fish population near the surface?
A
density
B
salinity
C
buoyancy
D
upwelling
2) How is the deep ocean floor different from the shallow parts of the ocean near land?
A
it is not covered with mud
B
it receives more light
C
it is steeper
D
It is flatter
3) Which of these organisms is a producer in a marine ecosystem?
A
worm
B
gull
C
fish
D
algae
4) What is a possible effect of high nutrient levels in water systems?
A
hotter water
B
healthier fish
C
algai blooms
D
fewer algae
5) Which of the following are indicators of a healthy water source?
A
high nitrates, high pH, and low temperature
B
low temperature, high dissolved oxygen and neutral pH
C
high turbidity, high dissolved oxygen, and high temperature
D
low pH, high nitrates, and low dissolved oxygen
6) Which of the following water pH levels is best for marine organisms?
A
1.0
B
11.5
C
3.5
D
8.0
7) Which bes describes the characteristics of a river basin?
A
the land at mouth of a river where water flows into the ocean
B
the land formed when rivers create estuaries and marshes
C
the land formed as the result of a river flooding
D
the land drained by a river and its tributaries
8) Which of the following occurs when algae decompose in the ocean?
A
decomposers at the ocean's surface remove oxygen from the air
B
the ocean water releases excess oxygen into the air
C
decomposers remove oxygen from the ocean water
D
decomposers add oxygen to the ocean water
9) A drop in dissolved oxygen during the summer is most likely due to:
A
low salinity
B
high temperatures
C
low turbidity
D
high pH
10) An algai bloom in a water system is most likely caused by:
A
large amounts of nutrients in runoff
B
increased use of fossil fuels
C
high oxygen levels in the water
D
decreases in fish population
*select an answer for all questions
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