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8.2 Estuaries Concept Check

Last updated almost 2 years ago

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How do estuaries act as natural filters for water?

Trap pollutants

Increase pollution

Delay water flow

Allow toxins to spread

Why are estuaries crucial for coastal ecosystems?

Biodiversity support

Habitat destruction

Population control

Reducing species variety

Which common estuary type is associated with the Hudson River?

Outer Banks

Bar Built

Fjord

Drowned River Valley

What physical characteristics fluctuate in estuaries?

Temperature

Tide

Shape

Salinity

Oxygen

What type of substrate is commonly found in estuaries?

Rocks

Clay

Silt

Sand

Gravel

What stays on top in estuaries due to density?

Plastics

Trash

Freshwater

Oil

What happens to salinity as you move up a river?

Remains constant

Increases

Decreases

Fluctuates

What extreme condition do organisms in estuaries need to adapt to?

Temperature

Pressure

Salinity

Humidity

Which animals migrate in estuaries for salinity adaptation? Select all that apply.

Salmon

Molluscs

Eels

Polychaetes

Where do organisms in estuaries find stability and protection?

In the air above ground

Inside large floating objects

Exposed on the water surface

Under the surface

Which estuarine community is primarily affected by pollution and overharvesting?

Oyster reefs

Mud flats

Open water

Intertidal zone organisms

Why does an estuary with lots of suspended sediment have poor light?

Water is too deep

Sediment is colorful

Algae absorb all light

Suspended sediment blocks sunlight

What is a characteristic of estuaries used by commercially important fish?

Lack of predators

High salinity

Deep waters

Acting as nurseries

What role do estuaries play in water quality management? Select all that apply.

Accelerate erosion

Maintain water quality

Increase sedimentation

Protection against storms and erosion

How does urban development impact estuarine communities?

Diversifies species

Increases pollution

Enhances oxygen levels

Promotes biodiversity