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