Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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Section 2 - Marine Ecosystems
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1.
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Organisms that live in estuaries must adapt to changes in
a. | temperature and precipitation. | b. | sunlight and nutrients. | c. | oxygen and
pollutants. | d. | water level and salinity. |
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2.
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Why doesn’t photosynthesis occur in deep ocean water?
a. | The water temperature is too cold. | b. | There is no sunlight. | c. | There are not enough
nutrients. | d. | The salinity level of the water is too high. |
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3.
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In estuaries, fresh water and salt water mix, forming a(n)
a. | algal bloom. | b. | habitat for shellfish. | c. | coastal
boundary. | d. | nutrient trap. |
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4.
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Most of the nutrients in an arctic ecosystem come from
a. | melting ice. | b. | the ocean. | c. | sunlight. | d. | lakes. |
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5.
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The majority of marine organisms are found in
a. | deep ocean waters. | b. | shallow, coastal waters. | c. | hydrothermal
vents. | d. | salt marshes. |
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Matching
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Section 2 - Marine Ecosystems
Choose the letter of the
term or phrase that best matches the description.
a. | barnacle | d. | runoff | b. | plankton | e. | coral reef | c. | open
ocean |
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6.
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potential threat to an estuary
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7.
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ecosystem found in shallow, tropical seas
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8.
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marine ecosystem considered not productive
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9.
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organism that anchors itself to grasses or rocks
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10.
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base of marine food web
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