Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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Section 1 - Freshwater Ecosystems
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1.
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Swamps are commonly found on
a. | rocky hillsides. | b. | flat, poorly drained land. | c. | mountain
peaks. | d. | bottoms of ponds or lakes. |
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2.
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The type of plankton that produces most of the food in an aquatic ecosystem is
called
a. | nekton. | b. | benthos. | c. | phytoplankton. | d. | zooplankton. |
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3.
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In which aquatic zone would you be likely to find cattails and reeds?
a. | littoral | b. | eutrophic | c. | benthic | d. | none of the
above |
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4.
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What are the two main types of freshwater wetlands?
a. | lakes and ponds | b. | rivers and streams | c. | littoral zones and
benthic zones | d. | marshes and swamps |
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5.
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Which ecosystem has the highest level of salinity?
a. | salt marsh | b. | brackish marsh | c. | river | d. | pond |
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Section 2 - Marine Ecosystems
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6.
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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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7.
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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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8.
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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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9.
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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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10.
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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 1 - Freshwater Ecosystems
Choose the letter of
the term or phrase that best matches the description.
a. | temperature | d. | benthos | b. | coral reef | e. | nekton | c. | pond |
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11.
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marine ecosystem
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12.
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bottom-dwelling organisms
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13.
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factor that determines where aquatic organisms live
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14.
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free-swimming organisms
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15.
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freshwater ecosystem
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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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16.
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potential threat to an estuary
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17.
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ecosystem found in shallow, tropical seas
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18.
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marine ecosystem considered not productive
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19.
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organism that anchors itself to grasses or rocks
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20.
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base of marine food web
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