Hydrosphere Part III Test Review: Question Preview (ID: 11481)

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Which condition in the ocean is most responsible for an increase in the fish population near the surface?
a) buoyancy
b) density
c) salinity
d) upwelling

How is the deep ocean floor different from the shallow parts of the ocean near land?
a) It is flatter
b) it is steeper
c) it receives more light
d) it is not covered with mud

Which of these organisms is a producer in a marine ecosystem?
a) fish
b) gull
c) algae
d) worm

What is a possible effect of high nutrient levels in water systems?
a) algai blooms
b) fewer algae
c) healthier fish
d) hotter water

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) low pH, high nitrates, and low dissolved oxygen
d) high turbidity, high dissolved oxygen, and high temperature

Which of the following water pH levels is best for marine organisms?
a) 1.0
b) 3.5
c) 8.0
d) 11.5

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 at mouth of a river where water flows into the ocean
d) the land formed as the result of a river flooding

Which of the following occurs when algae decompose in the ocean?
a) decomposers at the ocean's surface remove oxygen from the air
b) decomposers add oxygen to the ocean water
c) the ocean water releases excess oxygen into the air
d) decomposers remove oxygen from the ocean water

A drop in dissolved oxygen during the summer is most likely due to:
a) high pH
b) low turbidity
c) high temperatures
d) low salinity

An algai bloom in a water system is most likely caused by:
a) large amounts of nutrients in runoff
b) high oxygen levels in the water
c) increased use of fossil fuels
d) decreases in fish population

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